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Contribution A La Valorisation Chimique Directe Du Gaz Naturel
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Book Synopsis CONTRIBUTION A LA VALORISATION CHIMIQUE DIRECTE DU GAZ NATUREL by : PATRICE.. FRANCO
Download or read book CONTRIBUTION A LA VALORISATION CHIMIQUE DIRECTE DU GAZ NATUREL written by PATRICE.. FRANCO and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: INJECTE DANS DES GAZ DE COMBUSTION CHAUDS, LE METHANE REAGIT SELON DEUX VOIES PRINCIPALES: FORMATION D'HYDROCARBURES SUPERIEURS (PRINCIPALEMENT DE L'ACETYLENE) ET REFORMAGE (FORMATION PRINCIPALEMENT D'OXYDE DE CARBONE). DES SUIES ET DES HYDROCARBURES AROMATIQUES POLYCYCLIQUES SONT EGALEMENT OBSERVES EN FAIBLES PROPORTIONS. LA MISE AU POINT D'UN MODELE DE CINETIQUE CHIMIQUE DETAILLE VIENT COMPLETER L'ETUDE EXPERIMENTALE. LE MODELE DECRIT L'OXYDATION ET LA PYROLYSE DU METHANE PAR UN ENSEMBLE DE 461 REACTIONS ELEMENTAIRES. LA FORMATION DES SUIES EST REPRESENTEE PAR UN INDICE DE SUIE EGAL A LA FRACTION DE CARBONE PRESENT SOUS FORME DE BENZENE ET DE CYCLOPENTADIENE. LA VALIDATION DU MODELE A ETE FAITE PAR COMPARAISON AVEC DES RESULTATS EXPERIMENTAUX PUBLIES. CE MODELE CONFIRME LES RESULTATS OBTENUS AU PLAN EXPERIMENTAL ET PERMET DE SIMULER DES CONFIGURATIONS IMPOSSIBLES A ATTEINDRE SUR UNE INSTALLATION DE LABORATOIRE. IL PERMET EGALEMENT DE COMPARER DIVERS MODES DE PYROLYSE ET, EN PARTICULIER, DE CONFIRMER L'INTERET DE L'INJECTION DANS DES GAZ CHAUDS PAR RAPPORT A L'ECHANGE DE CHALEUR A TRAVERS UNE PAROI POUR REALISER LA CONVERSION DIRECTE DU METHANE. LE RENDEMENT EN ACETYLENE AUGMENTE AVEC LA TENEUR EN HYDROGENE DES GAZ CHAUDS. L'INDICE DE SUIE PEUT ETRE REDUIT EN CONTROLANT LE TEMPS DE SEJOUR ET EN AUGMENTANT LA TENEUR EN HYDROGENE DES GAZ CHAUDS
Book Synopsis VALORISATION CHIMIQUE DU METHANE PAR OXYDATION CATALYTIQUE SELECTIVE by : Nicolas Gueritey
Download or read book VALORISATION CHIMIQUE DU METHANE PAR OXYDATION CATALYTIQUE SELECTIVE written by Nicolas Gueritey and published by . This book was released on 1996 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA CONVERSION DU METHANE, PRINCIPAL CONSTITUTANT DU GAZ NATUREL, EN PRODUITS VALORISABLES ET FACILEMENT TRANSPORTABLES CONSTITUE UN ENJEU ECONOMIQUE IMPORTANT. LA REACTION DE COUPLAGE OXYDANT DU METHANE EST UNE DES VOIES LES PLUS ETUDIEES POUR SA TRANSFORMATION DIRECTE EN HYDROCARBURES SUPERIEURS. LE RENDEMENT OBTENU ETANT TROP FAIBLE POUR ENVISAGER UNE EXPLOITATION INDUSTRIELLE, IL EST NECESSAIRE DE MIEUX COMPRENDRE LA REACTION AFIN DE POUVOIR OPTIMISER LES PARAMETRES PHYSIQUES ET CINETIQUES. CETTE REACTION EST EN EFFET COMPLEXE CAR ELLE COMPORTE DES REACTIONS CATALYTIQUES ET DES REACTIONS RADICALAIRES EN PHASE GAZEUSE. C'EST POURQUOI NOTRE OBJECTIF ETAIT DE PROGRESSER DANS LA CONNAISSANCE DU MECANISME PAR UNE ETUDE EXPERIMENTALE METTANT EN JEU TROIS REACTEURS DIFFERENTS PERMETTANT DE FAIRE VARIER SEPAREMENT LES PARAMETRES LIES AU CATALYSEUR OU A LA PHASE GAZEUSE. NOUS AVONS PAR AILLEURS FAIT UNE ETUDE DES PHENOMENES DE DIFFUSION INTERVENANT DANS CES REACTEURS. LA COMPARAISON DES RESULTATS OBTENUS AVEC CES DIFFERENTS REACTEURS A FOURNI DES INFORMATIONS ORIGINALES. NOUS AVONS ALORS PROPOSE UN MECANISME SUSCEPTIBLE DE RENDRE COMPTE DE CETTE REACTION, CE QUI PERMET D'ADAPTER LES PARAMETRES ET LE REACTEUR A LA REACTION ET D'ENVISAGER UNE MODELISATION. NOUS AVONS AINSI MIS AU POINT UN REACTEUR CAPABLE DE DONNER DE BONS RENDEMENT EN COUPLAGE OXYDANT COMME EN GAZ DE SYNTHESE
Book Synopsis Valorisation chimique du gaz naturel par chloropyrolyse du chlorure de méthyle by : Christophe Lombard
Download or read book Valorisation chimique du gaz naturel par chloropyrolyse du chlorure de méthyle written by Christophe Lombard and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail concerne la valorisation chimique du méthane, principal constituant du gaz naturel. Son but est d'obtenir, à partir de ce dernier, des composés C2 comme le chlorure de vinyle, l'éthylène ou encore l'acétylène. Le méthane est d'abord transformé en un composé plus réactif, le chlorure de méthyle selon des procédés parfaitement définis et maîtrisés. Le chlorure de méthyle est ensuite pyrolysé en présence de dichlore ("chloropyrolyse ") sous la pression atmosphérique, à une température proche de 1 000ʿC, un temps de passage de l'ordre de la dizaine de millisecondes et un rapport initial [CI2]/[CH3CI] inférieur à 0,2. Le réacteur utilisé est de géométrie annulaire et est suivi d'une trempe indirecte de même géométrie. Il présente un grand rapport surface / volume favorisant les échanges de chaleur. Dans ces conditions, il est possible d'obtenir une conversion proche de 30 % accompagnée d'une sélectivité en dérivés C2 valorisables (C2H3CI + C2H4+ C2H2) de l'ordre de 40 %. Le dichlore se révèle être un inducteur efficace de la réaction et il n'ajoute pas de nouvel élément chimique au système réactionnel C/H/CI. En revanche, sa présence entraîne la formation d'un composé parasite, le chlorure de méthylène et des produits dérivés de ce dernier. A partir de l'analyse théorique de la réaction et de la revue détaillée de la littérature, un mécanisme comportant 504 processus élémentaires impliquant 99 espèces a été élaboré. Ce dernier a été confronté aux résultats , expérimentaux sur de larges domaines opératoires et validé. Les simulations nous permettent d'établir les principales voies de formation et de disparition des réactifs et des produits suivis expérimentalement
Book Synopsis Frontline and Factory by : Roy MacLeod
Download or read book Frontline and Factory written by Roy MacLeod and published by Springer Science & Business Media. This book was released on 2007-05-06 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a first considered attempt to study the factors that conditioned industrial chemistry for war in 1914-18. Taking a comparative perspective, it reflects on the experience of France, Germany, Austria, Russia, Britain, Italy and Russia, and points to significant similarities and differences. It looks at changing patterns in the organisation of industry, and at the emerging symbiosis between science, industry and the military.
Book Synopsis Recent Advances in Computational Terminology by : Didier Bourigault
Download or read book Recent Advances in Computational Terminology written by Didier Bourigault and published by John Benjamins Publishing. This book was released on 2001-06-15 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first collection of selected articles from researchers in automatic analysis, storage, and use of terminology, and specialists in applied linguistics, computational linguistics, information retrieval, and artificial intelligence offers new insights on computational terminology. The recent needs for intelligent information access, automatic query translation, cross-lingual information retrieval, knowledge management, and document handling have led practitioners and engineers to focus on automated term handling. This book offers new perspectives on their expectations. It will be of interest to terminologists, translators, language or knowledge engineers, librarians and all others dependent on the automation of terminology processing in professional practices. The articles cover themes such as automatic thesaurus construction, automatic term acquisition, automatic term translation, automatic indexing and abstracting, and computer-aided knowledge acquisition. The high academic standing of the contributors together with their experience in terminology management results in a set of contributions that tackle original and unique scientific issues in correlation with genuine applications of terminology processing.
Book Synopsis Advances in Solid State Fermentation by : S. Roussos
Download or read book Advances in Solid State Fermentation written by S. Roussos and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: G.HAINNAUX Departement Milieu et Activites Agricoles, Centre ORSTOM, 911 Avenue d' Agropolis, B.P. 5045, 34032 Montpellier Cedex , France. Solid state fermentation, popularly abbreviated as SSF, is currently investigated by many groups throughout the world. The study of this technique was largely neglected in the past in European and Western countries and there is now a high demand for SSF, meaning in food, environment, agricultural, phannaceutical and many other biotechnological applications. It gives me satisfaction to note that the importance of this technique was realised at my department way back in 1975 since then, our team has put concentrated efforts on developing this technique. xvii Foreword Advances in Solid State Fermentation Foreword M. PUYGRENIER Agropolis Valorisation, Avenue d' Agropolis, 34394 Montpellier Cedex 5, France. On the name of the Scientific Community, I would like to express the wish that this International Symposium on SSF should be successful. Solid State Fermentation is part of biotechnology research. It consists on seeding solid culture medium with bacteria or fungi (filamentous or higher) and on producing, in this medium (solid components and exudates) metabolites and high value products. In fact, this process is very old. In older industries such the food and agricultural, this technique has been extensively used. An example of this is the production of pork sausages and Roquefort cheese. Pharmaceutical industry could make extensive use of SSF in the production of secondary metabolites of many kinds and development in this direction is soon expected.
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Cropping Systems, Land Tenure and Social Diversity in Wenchi, Ghana by : Samuel Adjei-Nsiah
Download or read book Cropping Systems, Land Tenure and Social Diversity in Wenchi, Ghana written by Samuel Adjei-Nsiah and published by . This book was released on 2006 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: However, there is still considerable scope for further development of these self-organised innovations.
Book Synopsis The Mediterranean region under climate change by : Collectif
Download or read book The Mediterranean region under climate change written by Collectif and published by IRD Éditions. This book was released on 2018-11-19 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been published by Allenvi (French National Alliance for Environmental Research) to coincide with the 22nd Conference of Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakesh. It is the outcome of work by academic researchers on both sides of the Mediterranean and provides a remarkable scientific review of the mechanisms of climate change and its impacts on the environment, the economy, health and Mediterranean societies. It will also be valuable in developing responses that draw on “scientific evidence” to address the issues of adaptation, resource conservation, solutions and risk prevention. Reflecting the full complexity of the Mediterranean environment, the book is a major scientific contribution to the climate issue, where various scientific considerations converge to break down the boundaries between disciplines.
Book Synopsis Faecal Sludge Management by : Linda Strande
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Book Synopsis Natural Gas Conversion by : A. Holmen
Download or read book Natural Gas Conversion written by A. Holmen and published by Elsevier. This book was released on 1991-05-27 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings reflect the extensive fundamental and applied research efforts that are currently being made on the conversion of gas, in particular on the direct conversion of methane. The Symposium in Oslo focused on the following topics: Direct conversion of methane, Fischer-Tropsch chemistry, methanol conversion and natural gas conversion processes. The main aim was to present the state-of-the-art and progress currently being made within each of these areas. The book contains the papers presented and includes plenary lectures, short communications and posters. The papers will be of interest to scientists and engineers working in the field of gas conversion, transportation fuels, primary petrochemicals and catalysis.
Book Synopsis Advances in Renewable Hydrogen and Other Sustainable Energy Carriers by : Abdallah Khellaf
Download or read book Advances in Renewable Hydrogen and Other Sustainable Energy Carriers written by Abdallah Khellaf and published by Springer Nature. This book was released on 2020-08-19 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines a broad range of advances in hydrogen energy and alternative fuel developments and their role in the energy transition. The respective contributions were presented at the International Symposium on Sustainable Hydrogen, held in Algiers, Algeria on November 27-28, 2019. The transition from non-renewable polluting energy to sustainable green energy requires not only new energy sources but also new storage techniques and smart energy management. This situation has sparked renewed interest in hydrogen and alternative fuels, as they could help meet these needs. Indeed, hydrogen can not only be used as a clean energy vector or as an alternative fuel, but also as a storage medium or as an intermediary that enables improved energy management. This text offers a valuable reference guide for those working in the professional energy sector, as well as for students and instructors in academia who want to learn about the state of the art and future directions in the fields of hydrogen energy, alternative fuels and sustainable energy development.
Book Synopsis Bananas and Food Security by : Claudine Picq
Download or read book Bananas and Food Security written by Claudine Picq and published by Bioversity International. This book was released on 1999 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: Importance de la banane sur les plans economique et alimentaire; Diversite et dynamique des filieres; Organisation des marches et commercialisation; Systemes de productions/production systems.
Book Synopsis Artificial Intelligence in Society by : OECD
Download or read book Artificial Intelligence in Society written by OECD and published by OECD Publishing. This book was released on 2019-06-11 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The artificial intelligence (AI) landscape has evolved significantly from 1950 when Alan Turing first posed the question of whether machines can think. Today, AI is transforming societies and economies. It promises to generate productivity gains, improve well-being and help address global challenges, such as climate change, resource scarcity and health crises.
Book Synopsis Water & Heritage by : Willem Willems
Download or read book Water & Heritage written by Willem Willems and published by . This book was released on 2017-01-15 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water is vital for life, and its availability has been a concern for mankind throughout the ages. Its presence has always been ascertained in a variety of ways and the development of human society everywhere is connected with various forms of water management. Man also needed to manage water to find protection from its dangers and the need for that is increasing. In the coming decades, the impact of climate change is expected to intensify floods and droughts, affect groundwater resources, raise sea levels, increase pollution and enhance the frequency and magnitude of disasters. Societies around the world are challenged to adapt to these threats to ensure water security, economic prosperity and environmental and cultural sustainability. This book deals with the heritage of water management and the use that was made of water, as well as the impact of water management on heritage. An example of the former may be an ancient irrigation system in the Filipines or in the Middle East that still functions today, while the latter may reflect the importance of maintaining groundwater levels for the preservation of organic remains on archaeological sites or of wooden piles underneath standing buildings. In either case the papers in this book reflect the dynamic nature of water, and hence the equally dynamic relation between water management and heritage. This publication follows up on a Heritage and Water conference in Amsterdam, the first of its kind. Its main purpose is to credibly present the importance and value of heritage and historical experience for water and sustainable development, and vice versa, present the importance of water management for the protection of heritage. It presents evolving insights and concepts about Water and about Heritage from a variety of disciplines, policy and public perspectives illustrated with cases studies and aims to connect decision makers with experts such as engineers, archaeologists, historians, geographers, ecologist and landscape architects
Author :K. L. Cochrane Publisher :Food & Agriculture Organization of the UN (FAO) ISBN 13 :9789251063477 Total Pages :0 pages Book Rating :4.0/5 (634 download)
Book Synopsis Climate Change Implications for Fisheries and Aquaculture by : K. L. Cochrane
Download or read book Climate Change Implications for Fisheries and Aquaculture written by K. L. Cochrane and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the current scientific knowledge available on climate change implications for fisheries and aquaculture is provided through three technical papers that were presented and discussed during the Expert Workshop on Climate Change Implications for Fisheries and Aquaculture (Rome, 7-9 April 2008). A summary of the workshop outcomes as well as key messages on impacts of climate change on aquatic ecosystems and on fisheries- and aquaculture-based livelihoods are provided in the introduction of this Technical Paper. The first paper reviews the physical and ecological impacts of climate change relevant to marine and inland capture fisheries and aquaculture. The paper begins with a review of the physical impacts of climate change on marine and freshwater systems and then connects these changes with observed effects on fish production processes. It also outlines a series of scenarios of climate change impacts on fish production and ecosystems through case studies in different regions and ecosystems. The second paper tackles the consequences of climate change impacts on fisheries and their dependent communities. It analyses the exposure, sensitivity and vulnerability of fisheries to climate change and presents examples of adaptive mechanisms currently used in the sector. The contribution of fisheries to greenhouse gas emissions is addressed and examples of mitigation strategies are given. The role of public policy and institutions in promoting climate change adaptation and mitigation is also explored. Finally, the third paper addresses the impacts of climate change on aquaculture. It provides an overview of the current food fish and aquaculture production and a synthesis of existing studies on climate change effects on aquaculture and fisheries. The paper focuses on the direct and indirect impacts of climate change on aquaculture, in terms of biodiversity, fish disease and fishmeal. Contribution of aquaculture to climate change is addressed (carbon emission and carbon sequestration), as well as possible adaptation and mitigation measures that could be implemented.
Book Synopsis The Global Carbon Cycle and Climate Change by : David E. Reichle
Download or read book The Global Carbon Cycle and Climate Change written by David E. Reichle and published by Elsevier. This book was released on 2019-11-12 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Global Carbon Cycle and Climate Change examines the global carbon cycle and the energy balance of the biosphere, following carbon and energy through increasingly complex levels of metabolism from cells to ecosystems. Utilizing scientific explanations, analyses of ecosystem functions, extensive references, and cutting-edge examples of energy flow in ecosystems, it is an essential resource to aid in understanding the scientific basis of the role played by ecological systems in climate change. This book addresses the need to understand the global carbon cycle and the interrelationships among the disciplines of biology, chemistry, and physics in a holistic perspective. The Global Carbon Cycle and Climate Change is a compendium of easily accessible, technical information that provides a clear understanding of energy flow, ecosystem dynamics, the biosphere, and climate change. "Dr. Reichle brings over four decades of research on the structure and function of forest ecosystems to bear on the existential issue of our time, climate change. Using a comprehensive review of carbon biogeochemistry as scaled from the physiology of organisms to landscape processes, his analysis provides an integrated discussion of how diverse processes at varying time and spatial scales function. The work speaks to several audiences. Too often students study their courses in a vacuum without necessarily understanding the relationships that transcend from the cellular process, to organism, to biosphere levels and exist in a dynamic atmosphere with its own processes, and spatial dimensions. This book provides the template whereupon students can be guided to see how the pieces fit together. The book is self-contained but lends itself to be amplified upon by a student or professor. The same intellectual quest would also apply for the lay reader who seeks a broad understanding." --W.F. Harris Provides clear explanations, examples, and data for understanding fossil fuel emissions affecting atmospheric CO2 levels and climate change, and the role played by ecosystems in the global cycle of energy and carbon Presents a comprehensive, factually based synthesis of the global cycle of carbon in the biosphere and the underlying scientific bases Includes clear illustrations of environmental processes
