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Ruthenium Based Ionic Hydrogenation Catalysts For The Selective Deoxygenation Of Biomass Derived Feedstocks
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Author :University of Guelph. Department of Chemistry and Biochemistry Publisher : ISBN 13 :9780494501467 Total Pages :230 pages Book Rating :4.5/5 (14 download)
Book Synopsis Ruthenium-based Ionic Hydrogenation Catalysts for the Selective Deoxygenation of Biomass-derived Feedstocks by : University of Guelph. Department of Chemistry and Biochemistry
Download or read book Ruthenium-based Ionic Hydrogenation Catalysts for the Selective Deoxygenation of Biomass-derived Feedstocks written by University of Guelph. Department of Chemistry and Biochemistry and published by . This book was released on 2009 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ruthenium-based Ionic Hydrogenation Catalysts for the Selective Deoxygenation of 1,2-hexanediol and Glycerol by : Luska. Kylie
Download or read book Ruthenium-based Ionic Hydrogenation Catalysts for the Selective Deoxygenation of 1,2-hexanediol and Glycerol written by Luska. Kylie and published by . This book was released on 2007 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis HOMOGENEOUS TRIDENTATE RUTHENIUM BASED HYDROGENATION CATALYSTS FOR THE DEOXYGENATION OF BIOMASS DERIVED SUBSTRATES IN AQUEOUS ACIDIC MEDIA. by : Chris Oswin
Download or read book HOMOGENEOUS TRIDENTATE RUTHENIUM BASED HYDROGENATION CATALYSTS FOR THE DEOXYGENATION OF BIOMASS DERIVED SUBSTRATES IN AQUEOUS ACIDIC MEDIA. written by Chris Oswin and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deoxygenation and Hydrogenation of Biomass-derived Molecules Over Multifunctional Catalysts by : Mshari Alotaibi
Download or read book Deoxygenation and Hydrogenation of Biomass-derived Molecules Over Multifunctional Catalysts written by Mshari Alotaibi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this work was to investigate heterogeneous catalysis of the deoxygenation of renewable feedstocks for value-added chemicals and fuels using heteropoly acids. The main focus was on H3PW12O40 (HPW) and its Cs acidic salt Cs2.5H0.5PW12O40 (CsPW), which have sufficiently high thermal stability, with decomposition temperatures of 450 and > 500 °C, respectively. These compounds have very strong Brønsted acidity and are well documented as acid catalysts. They were used for the deoxygenation and hydrogenation of propionic acid, methyl isobutyl ketone (MIBK) and diisobutyl ketone (DIBK) in the gas phase. For comparison, zeolite catalysts doped with Pt were examined for the deoxygenation of MIBK. CsPW was doped with Pd, Pt, Cu and Ru metals using the impregnation method, while Pt was doped on zeolites by ion exchange. The catalysts under study were characterised using various physical and chemical techniques. CsPW and CsPW-supported Pd, Pt and Cu catalysts were found to be stable in the deoxygenation of propionic acid. They retained the Keggin structure of their polyanion (primary structure), as well as the CsPW crystal structure (secondary structure), after reaction at 400 °C in H2, whereas HPW decomposed above 350 °C in N2. The reaction was found to involve several pathways including ketonisation, decarbonylation, decarboxylation and hydrogenation, leading to the partial or total deoxygenation of propionic acid. HPW/SiO2 and CsPW, both in H2 and in N2, exhibited ketonisation activity between 250 and 300 °C to yield 3-pentanone, CsPW being more selective than HPW. At 400 °C, HPW and CsPW were active for the decarbonylation and decarboxylation of propionic acid to yield ethene and ethane respectively. Loading Pd or Pt onto CsPW greatly enhanced decarbonylation in flowing H2, but had little effect in N2. Similar performance was exhibited by Pd and Pt on SiO2, giving almost 100% selectivity to ethene in H2. These results are consistent with the hydrodeoxygenation of propionic acid on Pd and Pt, suggesting that hydrogenolysis of the C-C bond plays an essential role. Cu catalysts were active in the hydrogenation of the C=O bond to yield propanal and 1-propanol. Turnover rates of propionic acid conversion on metal catalysts followed the order Pd > Pt > Cu. Pt/CsPW was found to be a very efficient catalyst for the selective one-step hydrodeoxygenation of biomass-derived aliphatic ketones MIBK and DIBK to yield 2-methylpentane (MP) and 2,6-dimethylheptane (DMH) under mild conditions at 100 °C and 1 bar pressure without isomerisation of the carbon backbone via a metal-acid bifunctional mechanism. For MIBK hydrogenation, the mechanism involves MIBK hydrogenation to MP-ol on metal sites followed by MP-ol dehydration on acid sites to form olefin and finally olefin hydrogenation to 2MP on metal sites. Pt/ZSM-5 matched the catalytic performance of Pt/CsPW at 200 °C, but considerable isomerisation of MP took place at this temperature. This shows that the strong acidity of CsPW is essential for the high efficiency of the Pt/CsPW catalyst.
Author :University of Guelph. Department of Chemistry and Biochemistry Publisher : ISBN 13 :9780494714782 Total Pages :181 pages Book Rating :4.7/5 (147 download)
Book Synopsis Heterogeneous and Homogeneous Hydrogenation Catalysts for the Selective Deoxygenation of Biomass Feedstocks by : University of Guelph. Department of Chemistry and Biochemistry
Download or read book Heterogeneous and Homogeneous Hydrogenation Catalysts for the Selective Deoxygenation of Biomass Feedstocks written by University of Guelph. Department of Chemistry and Biochemistry and published by . This book was released on 2010 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Homogeneous Tetradentate Ruthenium Hydrogenation Catalysts for the Deoxygenation of Biomass-Derived Substrates in Aqueous Acidic Media by : Thomas Minard
Download or read book Homogeneous Tetradentate Ruthenium Hydrogenation Catalysts for the Deoxygenation of Biomass-Derived Substrates in Aqueous Acidic Media written by Thomas Minard and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis RUTHENIUM-PHENYLTERPYRIDINE AND RUTHENIUM-8-QUINOLINETHIOLATE-PHENYLTERPYRIDINE COMPLEXES AS HOMOGENEOUS WATER AND HIGH TEMPERATURE STABLE HYDROGENATION CATALYSTS FOR BIOMASS-DERIVED SUBSTRATES. by : Ryan Sullivan
Download or read book RUTHENIUM-PHENYLTERPYRIDINE AND RUTHENIUM-8-QUINOLINETHIOLATE-PHENYLTERPYRIDINE COMPLEXES AS HOMOGENEOUS WATER AND HIGH TEMPERATURE STABLE HYDROGENATION CATALYSTS FOR BIOMASS-DERIVED SUBSTRATES. written by Ryan Sullivan and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :University of Guelph. Department of Chemistry and Biochemistry Publisher : ISBN 13 :9780494305621 Total Pages :247 pages Book Rating :4.3/5 (56 download)
Book Synopsis Ruthenium Based Ionic Hydrogenation Catalysts Used in the Hydrogenation of Various Carbonyl Containing Substrates in Acidic Aqueous Sulfolane Medium by : University of Guelph. Department of Chemistry and Biochemistry
Download or read book Ruthenium Based Ionic Hydrogenation Catalysts Used in the Hydrogenation of Various Carbonyl Containing Substrates in Acidic Aqueous Sulfolane Medium written by University of Guelph. Department of Chemistry and Biochemistry and published by . This book was released on 2007 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogenation and Hydrogenolysis with Ruthenium Catalysts and Application to Biomass Conversion by : Thomas Ernst Ernst M√oller
Download or read book Hydrogenation and Hydrogenolysis with Ruthenium Catalysts and Application to Biomass Conversion written by Thomas Ernst Ernst M√oller and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the rising emphasis on efficient and highly selective chemical transformations, the field of ruthenium-catalysed hydrogenation and hydrogenolysis reactions has grown tremendously over recent years. The advances are triggered by the detailed understanding of the catalytic pathways that have enabled researchers to improve known transformations and realise new transformations in biomass conversion. Starting with the properties of ruthenium, this chapter introduces the concept of the catalytic function as a basis for rational design of ruthenium catalysts. Emphasis is placed on discussing the principles of dissociative adsorption of hydrogen. The principles are then applied to the conversion of typical biomolecules such as cellulose, hemicellulose and lignin. Characteristic features make ruthenium catalysis one of the most outstanding tools for implementing sustainable chemical transformations.
Book Synopsis The Deoxygenation and Hydrogenation Properties of Noble Metal-based Bimetallic Phosphide Catalysts by : Paul M. Cochran
Download or read book The Deoxygenation and Hydrogenation Properties of Noble Metal-based Bimetallic Phosphide Catalysts written by Paul M. Cochran and published by . This book was released on 2016 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Biorefineries by : Paul R. Stuart
Download or read book Integrated Biorefineries written by Paul R. Stuart and published by CRC Press. This book was released on 2012-12-10 with total page 873 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated Biorefineries: Design, Analysis, and Optimization examines how to create a competitive edge in biorefinery innovation through integration into existing processes and infrastructure. Leading experts from around the world working in design, synthesis, and optimization of integrated biorefineries present the various aspects of this complex
Book Synopsis Controlling Reactivity in the Conversion of Biomass-derived Levoglucosenone to Renewable Chemicals Over Metal and Acid Catalysts by : Siddarth Hari Krishna
Download or read book Controlling Reactivity in the Conversion of Biomass-derived Levoglucosenone to Renewable Chemicals Over Metal and Acid Catalysts written by Siddarth Hari Krishna and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have investigated the catalytic conversion of biomass-derived intermediates to a variety of renewable chemicals over metal and acid catalysts, with an emphasis on the platform molecule levoglucosenone. Lignocellulosic biomass and sugars are sustainable sources of carbon which can be converted, through selective C-O cleavage and hydrogenation reactions, to precursors to high-value chemicals such as polymers and non-toxic solvents. Metal catalysts facilitate hydrogenation of C=C and C=O bonds; acid catalysts facilitate C-O cleavage reactions; and bifunctional metal-acid catalysts facilitate these reactions in tandem. As biomass-derived feedstocks are highly functionalized, controlling the selectivity to desired products is a critical component of economically viable conversion processes. Reaction pathways were elucidated using a combination of techniques including analysis of products formed over time, variation of reaction conditions, variation of active site properties, investigation of stereochemistry, and isotopic labeling. Reactions studied include the acid-catalyzed isomerization of levoglucosenone to 5-hydroxymethylfurfural; the metal-catalyzed hydrogenation to Cyrene and levoglucosanol; hydrogenolysis of levoglucosanol to tetrahydrofurandimethanol; hydrogenolysis of levoglucosanol to 1,2,5,6-hexanetetrol; and conversion of methyl glycosides to hexane-tetrols and hexane-triols. We demonstrated how a fundamental understanding of the catalytic chemistry leads to the ability to tune selectivity towards desired products, thereby providing directions for the rational design of processes to produce valuable chemicals from biomass.
Book Synopsis Aqueous-phase Catalytic Conversions of Renewable Feedstocks for Sustainable Biorefineries by : Georgios Papadogianakis
Download or read book Aqueous-phase Catalytic Conversions of Renewable Feedstocks for Sustainable Biorefineries written by Georgios Papadogianakis and published by Frontiers Media SA. This book was released on 2024-08-23 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, there is growing interest in aqueous-phase catalytic conversions for the valorization of renewable biomass-based feedstocks for biorefineries to produce, in a sustainable way, biofuels, chemicals, power, energy, materials, pharmaceuticals and food. This is because of the highly polar nature of water which makes it an ideal medium to convert polar biomass-based lignocellulose (cellulose, hemicellulose, lignin), with high oxygen content, and their upgraded products such as hydrophilic carbohydrates, platform chemicals and their derivatives. Another reason which makes water the solvent of choice is that water itself is involved either as a reagent or as a byproduct even in large amounts in typical conversions for the valorization of biomass. The obtained intermediates further react in the aqueous medium, often without any separation and purification, to manufacture more valuable products. This results in substantial energy savings, lower emissions and economic benefits. Furthermore, water could act as a catalyst in conversions of biomass-based feedstocks such as in liquefaction reactions under subcritical conditions. Moreover, novel types of catalytic reactivity have been observed in the aqueous solvent, not only with water-soluble transition metal catalytic complexes, but also with conventional heterogeneous catalysts and catalytic nanoparticles in a broad spectrum of different reactions such as, inter alia, aldol condensations and hydrogenation reactions. For example, in the aqueous-phase hydrogenation of the biomass-based key platform chemical levulinic acid into γ-valerolactone and beyond, employing heterogeneous catalysts and nanoparticles the presence of water has a beneficial effect and accelerates the reaction rates, whereas in organic solvents much lower activities were observed. This promotional effect of water in the hydrogenation of levulinic acid was proved by many experimental and theoretical studies using a broad spectrum of different types of catalytic systems.
Book Synopsis Chemical Catalysts for Biomass Upgrading by : Mark Crocker
Download or read book Chemical Catalysts for Biomass Upgrading written by Mark Crocker and published by John Wiley & Sons. This book was released on 2020-03-09 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference to the use of innovative catalysts and processes to turn biomass into value-added chemicals Chemical Catalysts for Biomass Upgrading offers detailed descriptions of catalysts and catalytic processes employed in the synthesis of chemicals and fuels from the most abundant and important biomass types. The contributors?noted experts on the topic?focus on the application of catalysts to the pyrolysis of whole biomass and to the upgrading of bio-oils. The authors discuss catalytic approaches to the processing of biomass-derived oxygenates, as exemplified by sugars, via reactions such as reforming, hydrogenation, oxidation, and condensation reactions. Additionally, the book provides an overview of catalysts for lignin valorization via oxidative and reductive methods and considers the conversion of fats and oils to fuels and terminal olefins by means of esterification/transesterification, hydrodeoxygenation, and decarboxylation/decarbonylation processes. The authors also provide an overview of conversion processes based on terpenes and chitin, two emerging feedstocks with a rich chemistry, and summarize some of the emerging trends in the field. This important book: -Provides a comprehensive review of innovative catalysts, catalytic processes, and catalyst design -Offers a guide to one of the most promising ways to find useful alternatives for fossil fuel resources -Includes information on the most abundant and important types of biomass feedstocks -Examines fields such as catalytic cracking, pyrolysis, depolymerization, and many more Written for catalytic chemists, process engineers, environmental chemists, bioengineers, organic chemists, and polymer chemists, Chemical Catalysts for Biomass Upgrading presents deep insights on the most important aspects of biomass upgrading and their various types.
Book Synopsis Bifunctional Catalysts for Upgrading of Biomass-derived Oxygenates by :
Download or read book Bifunctional Catalysts for Upgrading of Biomass-derived Oxygenates written by and published by . This book was released on 2016 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deoxygenation is an important reaction in the conversion of biomass-derived oxygenates to fuels and chemicals. A key route for biomass refining involves the production of pyrolysis oil through rapid heating of the raw biomass feedstock. Pyrolysis oil as produced is highly oxygenated, so the feasibility of this approach depends in large part on the ability to selectively deoxygenate pyrolysis oil components to create a stream of high-value finished products. Identification of catalytic materials that are active and selective for deoxygenation of pyrolysis oil components has therefore represented a major research area. One catalyst is rarely capable of performing the different types of elementary reaction steps required to deoxygenate biomass-derived compounds. For this reason, considerable attention has been placed on bifunctional catalysts, where two different active materials are used to provide catalytic sites for diverse reaction steps. Here, we review recent trends in the development of catalysts, with a focus on catalysts for which a bifunctional effect has been proposed. We summarize recent studies of hydrodeoxygenation (HDO) of pyrolysis oil and model compounds for a range of materials, including supported metal and bimetallic catalysts as well as transition-metal oxides, sulfides, carbides, nitrides, and phosphides. Particular emphasis is placed on how catalyst structure can be related to performance via molecular-level mechanisms. Finally, these studies demonstrate the importance of catalyst bifunctionality, with each class of materials requiring hydrogenation and C-O scission sites to perform HDO at reasonable rates.
Book Synopsis Catalytic Hydrogenation by : L. Cervený
Download or read book Catalytic Hydrogenation written by L. Cervený and published by Elsevier. This book was released on 1986-08-01 with total page 705 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collection of contributions in this volume presents the most up-to-date findings in catalytic hydrogenation. The individual chapters have been written by 36 top specialists each of whom has achieved a remarkable depth of coverage when dealing with his particular topic. In addition to detailed treatment of the most recent problems connected with catalytic hydrogenations, the book also contains a number of previously unpublished results obtained either by the authors themselves or within the organizations to which they are affiliated.Because of its topical and original character, the book provides a wealth of information which will be invaluable not only to researchers and technicians dealing with hydrogenation, but also to all those concerned with homogeneous and heterogeneous catalysis, organic technology, petrochemistry and chemical engineering.
Book Synopsis Handbook of Biomass Valorization for Industrial Applications by : Shahid ul-Islam
Download or read book Handbook of Biomass Valorization for Industrial Applications written by Shahid ul-Islam and published by John Wiley & Sons. This book was released on 2022-01-05 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: HANDBOOK of BIOMASS VALORIZATION for INDUSTRIAL APPLICATIONS The handbook provides a comprehensive view of cutting-edge research on biomass valorization, from advanced fabrication methodologies through useful derived materials, to current and potential application sectors. Industrial sectors, such as food, textiles, petrochemicals and pharmaceuticals, generate massive amounts of waste each year, the disposal of which has become a major issue worldwide. As a result, implementing a circular economy that employs sustainable practices in waste management is critical for any industry. Moreover, fossil fuels, which are the primary sources of fuel in the transportation sector, are also being rapidly depleted at an alarming rate. Therefore, to combat these global issues without increasing our carbon footprint, we must look for renewable resources to produce chemicals and biomaterials. In that context, agricultural waste materials are gaining popularity as cost-effective and abundantly available alternatives to fossil resources for the production of a variety of value-added products, including renewable fuels, fuel components, and fuel additives. Handbook of Biomass Valorization for Industrial Applications investigates current and emerging feedstocks, as well as provides in-depth technical information on advanced catalytic processes and technologies that enable the development of all possible alternative energy sources. The 22 chapters of this book comprehensively cover the valorization of agricultural wastes and their various uses in value-added applications like energy, biofuels, fertilizers, and wastewater treatment. Audience The book is intended for a very broad audience working in the fields of materials sciences, chemical engineering, nanotechnology, energy, environment, chemistry, etc. This book will be an invaluable reference source for the libraries in universities and industrial institutions, government and independent institutes, individual research groups, and scientists working in the field of valorization of biomass.
