Renewable Raw Materials For Industry And Energy

Download Renewable Raw Materials For Industry And Energy full books in PDF, epub, and Kindle. Read online Renewable Raw Materials For Industry And Energy ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Biomass as Renewable Raw Material to Obtain Bioproducts of High-Tech Value

Author : Valentin I. Popa
Publisher : Elsevier
ISBN 13 : 0444637974
Total Pages : 494 pages
Book Rating : 4.4/5 (446 download)

DOWNLOAD NOW!

Book Synopsis Biomass as Renewable Raw Material to Obtain Bioproducts of High-Tech Value by : Valentin I. Popa

Download or read book Biomass as Renewable Raw Material to Obtain Bioproducts of High-Tech Value written by Valentin I. Popa and published by Elsevier. This book was released on 2018-02-15 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomass as Renewable Raw Material to Obtain Bioproducts of High-tech Value examines the use of biomass as a raw material, including terrestrial and aquatic sources to obtain extracts (e.g. polyphenols), biofuels, and/or intermediates (furfural, levulinates) through chemical and biochemical processes. The book also covers the production of natural polymers using biomass and the biosynthetic process, cellulose modified by biochemical and chemical methods, and other biochemicals that can be used in the synthesis of various pharmaceuticals. Featuring case studies, discussions of sustainability, and nanomedical, biomedical, and pharmaceutical applications, Biomass as Renewable Raw Material to Obtain Bioproducts of High-tech Value is a crucial resource for biotechnologists, biochemical engineers, biochemists, microbiologists, and research students in these areas, as well as entrepreneurs, policy makers, stakeholders, and politicians. - Reviews biomass resources and compounds with bioactive properties - Describes chemical and biochemical processes for creating biofuels from biomass - Outlines production of polysaccharides and cellulose derivatives - Features applications in the fields of medicine and pharmacy

Raw Materials for Future Energy Supply

Author : Friedrich-W. Wellmer
Publisher : Springer
ISBN 13 : 3319912291
Total Pages : 248 pages
Book Rating : 4.3/5 (199 download)

DOWNLOAD NOW!

Book Synopsis Raw Materials for Future Energy Supply by : Friedrich-W. Wellmer

Download or read book Raw Materials for Future Energy Supply written by Friedrich-W. Wellmer and published by Springer. This book was released on 2018-06-25 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book that analyses the future raw materials supply from the demand side of a society that chiefly relies on renewable energies, which is of great significance for us all. It addresses primary and secondary resources and substitution, not only from technical but also socioeconomic and ethical points of view. The “Energiewende” (Energy Transition) will change our consumption of natural resources significantly. When in future our energy requirements will be covered mostly by wind, solar power and biomass, we will need less coal, oil and natural gas. However, the consumption of minerals, especially metallic resources, will increase to build wind generators, solar panels or energy storage facilities. Besides e.g. copper, nickel or cobalt, rare earth elements and other high-tech elements will be increasingly used. With regard to primary metals, Germany is 100 % import dependent; only secondary material is produced within Germany. Though sufficient geological primary resources exist worldwide, their availability on the market is crucial. The future supply of the market is dependent on the development of prices, the transparency of the market and the question of social and ethical standards in the raw materials industry, as well as the social license to operate, which especially applies to mining. The book offers a valuable resource for everyone interested in the future raw material supply of our way of life, which will involve more and more renewable energies.

Renewable Raw Materials

Author : Roland Ulber
Publisher : John Wiley & Sons
ISBN 13 : 3527634207
Total Pages : 325 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!

Book Synopsis Renewable Raw Materials by : Roland Ulber

Download or read book Renewable Raw Materials written by Roland Ulber and published by John Wiley & Sons. This book was released on 2011-04-27 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the main challenges facing the chemical industry is the transition to sustainable operations. Industries are taking initiatives to reduce resource intensities or footprints, and by adopting safer materials and processes. Such efforts need to be supported by techniques that can quantify the broad economic and environmental implications of industrial operations, retrofi t options and provide new design alternatives. This contemporary overview focuses on cradle-to-grave life cycle assessments of existing or conceptual processes for producing valueadded fuels, chemicals, and/or materials from renewable agricultural residues, plant-derived starches and oils, lignocellulosic biomass, and plant-based industrial processing wastes. It presents the key concepts, systems, and technologies, with an emphasis on new feedstocks for the chemical industry. Each chapter uses common themes of specifi c raw materials, thus forming a natural progression throughout the book. The result is coverage from a wide range of perspectives, emphasizing not only the technical issues but also considering the market place and socio-economic aspects.

Biobased Industrial Products

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309175402
Total Pages : 162 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!

Book Synopsis Biobased Industrial Products by : National Research Council

Download or read book Biobased Industrial Products written by National Research Council and published by National Academies Press. This book was released on 2000-02-16 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Petroleum-based industrial products have gradually replaced products derived from biological materials. However, biologically based products are making a comebackâ€"because of a threefold increase in farm productivity and new technologies. Biobased Industrial Products envisions a biobased industrial future, where starch will be used to make biopolymers and vegetable oils will become a routine component in lubricants and detergents. Biobased Industrial Products overviews the U.S. land resources available for agricultural production, summarizes plant materials currently produced, and describes prospects for increasing varieties and yields. The committee discusses the concept of the biorefinery and outlines proven and potential thermal, mechanical, and chemical technologies for conversion of natural resources to industrial applications. The committee also illustrates the developmental dynamics of biobased products through existing examples, as well as products still on the drawing board, and it identifies priorities for research and development.

The Material Basis of Energy Transitions

Author : Alena Bleicher
Publisher : Academic Press
ISBN 13 : 0128235543
Total Pages : 258 pages
Book Rating : 4.1/5 (282 download)

DOWNLOAD NOW!

Book Synopsis The Material Basis of Energy Transitions by : Alena Bleicher

Download or read book The Material Basis of Energy Transitions written by Alena Bleicher and published by Academic Press. This book was released on 2020-08-05 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Material Basis of Energy Transitions explores the intersection between critical raw material provision and the energy system. Chapters draw on examples and case studies involving energy technologies (e.g., electric power, transport) and raw material provision (e.g., mining, recycling), and consider these in their regional and global contexts. The book critically discusses issues such as the notion of criticality in the context of a circular economy, approaches for estimating the need for raw materials, certification schemes for raw materials, the role of consumers, and the impact of renewable energy development on resource conflicts. Each chapter deals with a specific issue that characterizes the interdependency between critical raw materials and renewable energies by examining case studies from a particular conceptual perspective. The book is a resource for students and researchers from the social sciences, natural sciences, and engineering, as well as interdisciplinary scholars interested in the field of renewable energies, the circular economy, recycling, transport, and mining. The book is also of interest to policymakers in the fields of renewable energy, recycling, and mining, professionals from the energy and resource industries, as well as energy experts and consultants looking for an interdisciplinary assessment of critical materials. - Provides a comprehensive overview of key issues related to the nexus between renewable energy and critical raw materials - Explores interdisciplinary perspectives from the natural sciences, engineering, and social sciences - Discusses critical strategies to address the nexus from a practitioner's perspective

Biodiesel Science and Technology

Author : Jan C.J. Bart
Publisher : Elsevier
ISBN 13 : 1845697766
Total Pages : 859 pages
Book Rating : 4.8/5 (456 download)

DOWNLOAD NOW!

Book Synopsis Biodiesel Science and Technology by : Jan C.J. Bart

Download or read book Biodiesel Science and Technology written by Jan C.J. Bart and published by Elsevier. This book was released on 2010-02-19 with total page 859 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiesel production is a rapidly advancing field worldwide, with biodiesel fuel increasingly being used in compression ignition (diesel) engines. Biodiesel has been extensively studied and utilised in developed countries, and it is increasingly being introduced in developing countries, especially in regions with high potential for sustainable biodiesel production.Initial sections systematically review feedstock resources and vegetable oil formulations, including the economics of vegetable oil conversion to diesel fuel, with additional coverage of emerging energy crops for biodiesel production. Further sections review the transesterification process, including chemical (catalysis) and biochemical (biocatalysis) processes, with extended coverage of industrial process technology and control methods, and standards for biodiesel fuel quality assurance. Final chapters cover the sustainability, performance and environmental issues of biodiesel production, as well as routes to improve glycerol by-product usage and the development of next-generation products.Biodiesel science and technology: From soil to oil provides a comprehensive reference to fuel engineers, researchers and academics on the technological developments involved in improving biodiesel quality and production capacity that are crucial to the future of the industry. - Evaluates biodiesel as a renewable energy source and documents global biodiesel development - The outlook for biodiesel science and technology is presented exploring the challenges faced by the global diesel industry - Reviews feedstock resources and vegetable oil formation including emerging crops and the agronomic potential of underexploited oil crops

Lignin and Lignans as Renewable Raw Materials

Author : Francisco G. Calvo-Flores
Publisher : John Wiley & Sons
ISBN 13 : 1118682955
Total Pages : 512 pages
Book Rating : 4.1/5 (186 download)

DOWNLOAD NOW!

Book Synopsis Lignin and Lignans as Renewable Raw Materials by : Francisco G. Calvo-Flores

Download or read book Lignin and Lignans as Renewable Raw Materials written by Francisco G. Calvo-Flores and published by John Wiley & Sons. This book was released on 2015-08-11 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: As naturally occurring and abundant sources of non-fossil carbon, lignin and lignans offer exciting possibilities as a source of commercially valuable products, moving away from petrochemical-based feedstocks in favour of renewable raw materials. Lignin can be used directly in fields such as agriculture, livestock, soil rehabilitation, bioremediation and the polymer industry, or it can be chemically modified for the fabrication of specialty and high-value chemicals such as resins, adhesives, fuels and greases. Lignin and Lignans as Renewable Raw Materials presents a multidisciplinary overview of the state-of-the-art and future prospects of lignin and lignans. The book discusses the origin, structure, function and applications of both types of compounds, describing the main resources and values of these products as carbon raw materials. Topics covered include: • Structure and physicochemical properties • Lignin detection methods • Biosynthesis of lignin • Isolation methods • Characterization and modification of lignins • Applications of modified and unmodified lignins • Lignans: structure, chemical and biological properties • Future perspectives This book is a comprehensive resource for researchers, scientists and engineers in academia and industry working on new possibilities for the application of renewable raw materials. For more information on the Wiley Series in Renewable Resources, visit www.wiley.com/go/rrs

Advances in raw material industries for sustainable development goals

Author : Vladimir Litvinenko
Publisher : CRC Press
ISBN 13 : 1000376435
Total Pages : 516 pages
Book Rating : 4.0/5 (3 download)

DOWNLOAD NOW!

Book Synopsis Advances in raw material industries for sustainable development goals by : Vladimir Litvinenko

Download or read book Advances in raw material industries for sustainable development goals written by Vladimir Litvinenko and published by CRC Press. This book was released on 2020-12-29 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Advances in Raw Material Industries for Sustainable Development Goals" presents the results of joint scientific research conducted in the context of the Russian-German Raw Materials Forum. Today Russia and Germany are exploring various forms of cooperation in the field of mining, geology, mineralogy, mechanical engineering and energy. Russia and Germany are equally interested in expanding cooperation and modernizing the economy in terms of sustainable development. The main theme of this article collection is connected with existing business ventures and ideas from both Russia and Germany. In this book the authors regard complex processes in mining industry from various points of view, including: - modern technologies in prospecting, exploration and development of mineral resources - progressive methods of natural and industrial mineral raw materials processing - energy technologies and digital technologies for sustainable development - cutting-edge technologies and innovations in the oil and gas industry. Working with young researchers, supporting their individual professional development and creating conditions for their mobility and scientific cooperation are essential parts of Russian-German Raw Materials Forum founded in Dresden 13 years ago. This collection represents both willingness of young researchers to be involved in large-scale international projects like Russian-German Raw Material Forum and the results of their long and thorough work in the promising areas of cooperation between Russia and Germany.

Renewables-Based Technology

Author : Jo Dewulf
Publisher : John Wiley & Sons
ISBN 13 : 0470022434
Total Pages : 384 pages
Book Rating : 4.4/5 (7 download)

DOWNLOAD NOW!

Book Synopsis Renewables-Based Technology by : Jo Dewulf

Download or read book Renewables-Based Technology written by Jo Dewulf and published by John Wiley & Sons. This book was released on 2006-06-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainability is a key driving force for industries in the chemical, food, packaging, agricultural and pharmaceutical sectors, and quantitative sustainability indicators are being incorporated into company reports. This is driving the uptake of renewable resources and the adoption of renewables. Renewables' can either be the substituted raw materials that are used in a given industry, (e.g. the use of biomass for fuel); the use and/or modification of a crop for use in a new industry (e.g. plant cellulose), or the reuse of a waste product (e.g. organic waste for energy production). This is the first book in the Wiley Renewable Resources series that brings together the range of sustainability assessment methods and their uses. Ensuing books in the series will look at individual renewable materials and applications.

Chemistry of Renewables

Author : Arno Behr
Publisher : Springer Nature
ISBN 13 : 3662614308
Total Pages : 391 pages
Book Rating : 4.6/5 (626 download)

DOWNLOAD NOW!

Book Synopsis Chemistry of Renewables by : Arno Behr

Download or read book Chemistry of Renewables written by Arno Behr and published by Springer Nature. This book was released on 2020-10-29 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook introduces the industrial production and processing of natural resources. It is divided into six major topics (fats and oils, carbohydrates, lignin, terpenoids, other natural products, biorefinery), which are divided into a total of 20 chapters. Each chapter is self-contained and therefore a compact learning unit, which can be worked on by students in self-study or presented by lecturers. Clear illustrations, flow diagrams, apparatus drawings and photos facilitate the understanding of the subject matter. All chapters end with a succinct summary, the "Take Home Messages". Each chapter is supplemented by ten short test questions, which can be solved quickly after working through the chapter; the answers are at the end of the book. All chapters contain bibliographical references that focus on essential textbooks and reference works. As a prior knowledge, only basic knowledge of chemistry is required.

Alternative Energy Sources and Technologies

Author : Mariano Martín
Publisher : Springer
ISBN 13 : 3319287524
Total Pages : 511 pages
Book Rating : 4.3/5 (192 download)

DOWNLOAD NOW!

Book Synopsis Alternative Energy Sources and Technologies by : Mariano Martín

Download or read book Alternative Energy Sources and Technologies written by Mariano Martín and published by Springer. This book was released on 2016-03-22 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a comprehensive analysis of the use of alternative sources of energy and technologies to produce fuels and power, this book describes the energy value chain from harvesting the raw material, (i.e solar, wind, biomass or shale gas) followed by analysis of the processing steps into power, fuels and/or chemicals and finally the distribution of the products. Featuring an examination of the techno-economic processes and integration opportunities which can add value to by-products or promote the use of different sources of energy within the same facility, this book looks at the tools that can make this integration possible as well as utilising a real world case study. The case study of the operation of “El hierro” island is used as an example of the current effort towards more efficient use of the resources available. Tackling head on the open challenges of the supply, the variability of the source and its prediction, the description of novel processes that are being developed and evaluated for their transformation as well as how we can distribute them to the consumer and how we can integrate the new chemicals, fuels and power within the current system and infrastructure, the book takes a process based perspective with such an approach able to help us in the use and integration of these sources of energy and novel technologies.

1st World Conference on Biomass for Energy and Industry

Author : Spyros Kyritsis
Publisher : Earthscan
ISBN 13 : 9781902916156
Total Pages : 1170 pages
Book Rating : 4.9/5 (161 download)

DOWNLOAD NOW!

Book Synopsis 1st World Conference on Biomass for Energy and Industry by : Spyros Kyritsis

Download or read book 1st World Conference on Biomass for Energy and Industry written by Spyros Kyritsis and published by Earthscan. This book was released on 2001 with total page 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1st World Conference and Technology Exhibition on Biomass for Energy and Industry, held in Sevilla in June 2000, brought together for the first time the traditional European Conference on Biomass for Energy and Industry and the Biomass Conference of the Americas, thus creating the largest and most outstanding event in the worldwide biomass sector. The conference elaborated innovative global strategies, projects and efficient practice rules for energy and the environment at a key stage in the industry's development. New concepts and projects were highlighted to increase the social and political awareness for a change in worldwide resource consumption and to promote economically, socially and environmentally sustainable development for the next millennium. In 2 volumes, the Proceedings include some 470 papers essential to an understanding of current thinking, practice, research and global developments in the biomass sector - a vital reference source for researchers, manufacturers, and policy makers involved or interested in the use of biomass for energy and industry.

Materials for Sustainable Energy

Author : Vincent Dusastre
Publisher : World Scientific
ISBN 13 : 9814317640
Total Pages : 360 pages
Book Rating : 4.8/5 (143 download)

DOWNLOAD NOW!

Book Synopsis Materials for Sustainable Energy by : Vincent Dusastre

Download or read book Materials for Sustainable Energy written by Vincent Dusastre and published by World Scientific. This book was released on 2011 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: The search for cleaner, cheaper, smaller and more efficient energy technologies has to a large extent been motivated by the development of new materials. The aim of this collection of articles is therefore to focus on what materials-based solutions can offer and show how the rationale design and improvement of their physical and chemical properties can lead to energy-production alternatives that have the potential to compete with existing technologies. In terms of alternative means to generate electricity that utilize renewable energy sources, the most dramatic breakthroughs for both mobile (i.e., transportation) and stationary applications are taking place in the fields of solar and fuel cells. And from an energy-storage perspective, exciting developments can be seen emerging from the fields of rechargeable batteries and hydrogen storage.

A Practical Guide to Plastics Sustainability

Author : Michel Biron
Publisher : William Andrew
ISBN 13 : 0128215402
Total Pages : 691 pages
Book Rating : 4.1/5 (282 download)

DOWNLOAD NOW!

Book Synopsis A Practical Guide to Plastics Sustainability by : Michel Biron

Download or read book A Practical Guide to Plastics Sustainability written by Michel Biron and published by William Andrew. This book was released on 2020-04-18 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Practical Guide to Plastics Sustainability: Concept, Solutions, and Implementation is a groundbreaking reference work offering a broad, detailed and highly practical vision of the complex concept of sustainability in plastics. The book's aim is to present a range of potential pathways towards more sustainable plastics parts and products, enabling the reader to further integrate the idea of sustainability into their design process. It begins by introducing the context and concept of sustainability, discussing perceptions, drivers of change, key factors, and environmental issues, before presenting a detailed outline of the current situation with types of plastics, processing, and opportunities for improved sustainability. Subsequent chapters focus on the different possibilities for improved sustainability, offering a step-by-step technical approach to areas including design, properties, renewable plastics, and recycling and re-use. Each of these pillars are supported by data, examples, analysis and best practice guidance. Finally, the latest developments and future possibilities are considered. - Approaches the idea of sustainability from numerous angles, offering practical solutions to improve sustainability in the development of plastic components and products - Explains how sustainability can be applied across plastics design, materials selection, processing, and end of life, all set alongside socioeconomic factors - Considers key areas of innovation, such as eco-design, novel opportunities for recycling or re-use, bio-based polymers and new technologies

Biolubricants

Author : Jan C.J. Bart
Publisher : Elsevier
ISBN 13 : 085709632X
Total Pages : 944 pages
Book Rating : 4.8/5 (57 download)

DOWNLOAD NOW!

Book Synopsis Biolubricants by : Jan C.J. Bart

Download or read book Biolubricants written by Jan C.J. Bart and published by Elsevier. This book was released on 2012-12-18 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lubricants are essential in engineering, however more sustainable formulations are needed to avoid adverse effects on the ecosystem. Bio-based lubricant formulations present a promising solution. Biolubricants: Science and technology is a comprehensive, interdisciplinary and timely review of this important subject.Initial chapters address the principles of lubrication, before systematically reviewing fossil and bio-based feedstock resources for biodegradable lubricants. Further chapters describe catalytic, (bio) chemical functionalisation processes for transformation of feedstocks into commercial products, product development, relevant legislation, life cycle assessment, major product groups and specific performance criteria in all major applications. Final chapters consider markets for biolubricants, issues to consider when selecting and using a lubricant, lubricant disposal and future trends.With its distinguished authors, Biolubricants: Science and technology is a comprehensive reference for an industrial audience of oil formulators and lubrication engineers, as well as researchers and academics with an interest in the subject. It provides an essential overview of scientific and technological developments enabling the cost-effective improvement of biolubricants, something that is crucial for the green future of the lubricant industry. - A comprehensive, interdisciplinary and timely review of bio-based lubricant formulations - Addresses the principles of lubrication - Reviews fossil and bio-based feedstock resources for biodegradable lubricants

Biorefinery Production Technologies for Chemicals and Energy

Author : Arindam Kuila
Publisher : John Wiley & Sons
ISBN 13 : 1119591422
Total Pages : 416 pages
Book Rating : 4.1/5 (195 download)

DOWNLOAD NOW!

Book Synopsis Biorefinery Production Technologies for Chemicals and Energy by : Arindam Kuila

Download or read book Biorefinery Production Technologies for Chemicals and Energy written by Arindam Kuila and published by John Wiley & Sons. This book was released on 2020-10-20 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers almost all of the diverse aspects of utilizing lignocellulosic biomass for valuable biorefinery product development of chemicals, alternative fuels and energy. The world has shifted towards sustainable development for the generation of energy and industrially valuable chemicals. Biorefinery plays an important role in the integration of conversion process with high-end equipment facilities for the generation of energy, fuels and chemicals. The book is divided into four parts. The first part, "Basic Principles of Biorefinery," covers the concept of biorefinery, its application in industrial bioprocessing, the utilization of biomass for biorefinery application, and its future prospects and economic performance. The second part, "Biorefinery for Production of Chemicals," covers the production of bioactive compounds, gallic acid, C4, C5, and C6 compounds, etc., from a variety of substrates. The third part, "Biorefinery for Production of Alternative Fuel and Energy," covers sustainable production of bioethanol, biodiesel, and biogas from different types of substrates. The last part of this book discusses sequential utilization of wheat straw, material balance, and biorefinery approach. The approaches presented in this book will help readers/users from different areas like process engineering and biochemistry to plan integrated and inventive methods to trim down the expenditure of the industrial manufacture process to accomplish cost-effective feasible products in biorefinery.

Renewable Energy

Author : Martin Kaltschmitt
Publisher : Springer Science & Business Media
ISBN 13 : 3540709495
Total Pages : 590 pages
Book Rating : 4.5/5 (47 download)

DOWNLOAD NOW!

Book Synopsis Renewable Energy by : Martin Kaltschmitt

Download or read book Renewable Energy written by Martin Kaltschmitt and published by Springer Science & Business Media. This book was released on 2007-06-03 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: The utilisation of renewable energies is not at all new; in the history of mankind renewable energies have for a long time been the primary possibility of generating energy. This only changed with industrial revolution when lignite and hard coal became increasingly more important. Later on, also crude oil gained importance. Offering the advantages of easy transportation and processing also as a raw material, crude oil has become one of the prime energy carriers applied today. Moreover, natural gas used for space heating and power provision as well as a transportation fuel has become increasingly important, as it is abundantly available and only requires low investments in terms of energy conversion facilities. As fossil energy carriers were increasingly used for energy generation, at least by the industrialised countries, the application of renewable energies decreased in absolute and relative terms; besides a few exceptions, renewable energies are of secondary importance with regard to overall energy generation.