Download or read book Methanol Oxidation Over Non precious Transition Metal Oxide Catalysts written by Richard F. Kueller and published by . This book was released on 1989 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Complete Oxidation of Ethanol Acetaldehyde and a Methanol Ethanol Mixture Over Non precious Transition Metal Oxide Catalysts written by Hariharan Rajesh and published by . This book was released on 1991 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Precious Metal oxide Based Electrocatalysts for the Oxidation of Methanol written by Mahadevan Thangaraju and published by . This book was released on 1996 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalysis for Low Temperature Fuel Cells written by Vincenzo Baglio and published by MDPI. This book was released on 2018-03-23 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Catalysis for Low Temperature Fuel Cells" that was published in Catalysts

Download or read book Methanol Oxidation on Transition Elements Oxides written by Abdulmohsen Alshehri and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Methanol oxidation to formaldehyde is one of the most important industries in our lives; the reaction occurs on catalyst surface in heterogeneous catalysis. Iron molybdate is the current selective catalyst. However, molybdenum volatilises during methanol oxidation and leaving the catalyst with a low molybdenum ratio, which deactivates the catalyst, a 2.2 Mo: 1Fe iron molybdate catalyst was used instead the stoichiometric catalyst, while yield of formaldehyde cannot be 100%. The goal of this study is to find more selective and more productive catalyst than iron molybdate catalyst, the first step is to find another transition element as selective as molybdenum, because molybdenum is the selective part, and iron is the active part, the resulting iron molybdate catalyst is a selective catalyst to formaldehyde near molybdenum and active near iron. Experimentally, catalysts were prepared using co-precipitation method, however, some doped catalysts were papered by incipient wetness impregnation, also sol-immobilization was used to prepare nano-gold particles on the surfaces of few supports. Catalysts characterizations were carried out within several techniques for the surface analysis (XPS) and bulk analysis (XRD), also the surface area was measured by BET equipment. Raman too was used in this study, while micro-reactor was the reactor to determine selectivity and activity of each catalyst. When molybdenum replaced by vanadium, the catalyst yielded 100% formaldehyde at 200 oC; moreover, tungsten was selective. Likewise, iron was replaced by other active metals such as manganese, copper and bismuth, which are active. Nano-gold improved activity when doped on molybdenum oxide and iron molybdate supports.

Download or read book Selective Methane Oxidation Over Promoted Oxide Catalysts Quarterly Report December 1 1995 February 29 1996 written by and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a systematic study with a CH4/air reactant mixture at 600 C and 0.1 MPa, it is demonstrated that among eight Cab-O-Sil supported redox transition metal oxide catalysts, a V2O5/SiO2 catalyst exhibited the highest productivities of formaldehyde and methanol. The effect of steam on enhancing the space time yields of the oxygenates was observed with the catalysts that were studied with this third component in the reaction mixture. With the vanadia-containing catalyst, it was shown that a loading of 2 wt% of V2O5 on SiO2 produced the highest conversion of methane from a CH4/air/steam = 4/1/1 reactant mixture and the highest productivities of both CH3OH and HCHO. It was also shown that increasing the reactant flow rate (thereby decreasing the contact time) increased the space time yield of methanol but decreased the overall methane conversion level.

Download or read book The Heterogeneous Catalytic Oxidation of Methanol Over Metal Oxide Catalysts written by Brent Leslie Kennedy and published by . This book was released on 1995 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methanol Reforming Over Oxide Supported Transition Metal Catalysts written by Easwar Santhosh Ranganathan and published by . This book was released on 2006 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of Mo2C and Mo2N supported catalysts were also evaluated for MSR. The Pt/Mo2N catalyst was 50% more active than a commercial Cu/Zn/Al catalyst; however, the CO2 selectivity was substantially lower. Results from varying the reaction conditions suggested that the H2O adsorption/reaction rate on the Mo2N surface was lower than that on the Cu/Zn/Al catalyst. Additionally, CH3OH and CO competed for adsorption sites on the Pt/Mo2N catalyst.

Download or read book Electrodeposited Transition Metal Oxides as Electrocatalysts for Methane Partial Oxidation written by Yu-Chao Huang and published by . This book was released on 2021 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conversion of methane to valuable chemicals via electrochemical approaches is of great interest in the field of catalysis. Conventional catalytic processes utilize extreme conditions (high temperatures or pressures) to provide the energy required to achieve methane activation and require sophisticated heat integration networks to be economically viable. In contrast, catalytic processes via electrification or electrocatalysis offers direct routes of methane activation under ambient conditions, with lower energy requirements and simplified configurations. However, electrochemical oxidation of methane using current electrocatalysts remains challenging due to low energy efficiencies and a seemingly unavoidable trade-off between conversion and selectivity. In this regard, many research efforts have been devoted to the development of efficient and selective electrocatalysts for the activating and transformation of methane into valuable chemicals. Over the last decade, researchers have shown that composite transition metal oxides such as NiO/ZrO2 and Co3O4/ZrO2 can catalyze the electrochemical partial oxidation of methane to value-added chemicals such as methanol, ethanol, and propanol in a carbonate electrolyte. Chemical co-precipitation has been utilized predominantly for the preparation of metal oxide catalysts which involves multiple steps such as centrifugation, collection, drying, and annealing, and result in oxide materials with poor conductivity which are not amenable to electrocatalysis. In this work, a one-step electrodeposition method has been developed for the preparation of CoZrOx electrocatalysts. The electrodeposited CoZrOx material was found to be an active electrocatalyst for the partial oxidation of methane with a simple fabrication method. Furthermore, different electrodeposited unary transition metal oxides (CoOx, NiOx, MnOx, FeOx, and CuOx) were prepared through the same electrodeposition method, and were also studied for the electrochemical oxidation of methane. CoOx, NiOx, CuOx, and the CoZrOx electrocatalysts have been discovered to catalyze the conversion of methane to methanol. The preliminary results in this work demonstrate an additional approach among the available strategies for catalyst fabrication and may provide an efficient strategy of catalyst preparation for further studies of the electrochemical oxidation of methane under ambient conditions.

Download or read book Selective Methane Oxidation Over Promoted Oxide Catalysts Quarterly Report March May 1994 written by and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental work aiming at developing active catalysts for selective oxidation of methane to methanol was started in this quarter. Some of the experiments used a double catalyst bed design and with H2O as cofeed. The first catalyst bed, which serves as CH3 radical generator, was chosen to be 1 wt % SO42−/Sr/La2O3, as this catalyst exhibits remarkable activity and selectivity at lower temperature (500°C--550°C). A few transition metal oxides were used as the second catalyst bed to react with CH3 to form CH3O−M species, which was then hydrolyzed to form CH3OH. It was found that unsupported metal oxides ZrO2, Y2O3, SrO; Fe2O3, MnO2, Cr2O3, CaO, and MgO did not produce CH3OH between 430°C and 600°C when used as the only catalysts, while MoO3 supported on silica produced CH30H in the temperature range of 430°C--480°C under the current single-bed reactor configuration. However, when the double-bed configuration was used with the 1 wt % SO42−/Sr/La2O3 as the first methyl radical generating catalyst bed, CH30H was observed when ZrO2and Y2O3 were used as the second bed catalysts. Preliminary quantitative analysis showed that the ability of producing CH3OH was in the order of unsupported Y2O3> unsupported ZrO2> MoO3 on silica. For all of these cases, the CH3OH space time yield was within a dozen grams per kilogram catalyst per hour.

Download or read book Sustainable Hydrogen Production written by Ibrahim Dincer and published by Elsevier. This book was released on 2016-08-05 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Hydrogen Production provides readers with an introduction to the processes and technologies used in major hydrogen production methods. This book serves as a unique source for information on advanced hydrogen generation systems and applications (including integrated systems, hybrid systems, and multigeneration systems with hydrogen production). Advanced and clean technologies are linked to environmental impact issues, and methods for sustainable development are thoroughly discussed. With Earth's fast-growing populations, we face the challenge of rapidly rising energy needs. To balance these we must explore more sustainable methods of energy production. Hydrogen is one key sustainable method because of its versatility. It is a constituent of a large palette of essential materials, chemicals, and fuels. It is a source of power and a source of heat. Because of this versatility, the demand for hydrogen is sure to increase as we aim to explore more sustainable methods of energy. Furthermore, Sustainable Hydrogen Production provides methodologies, models, and analysis techniques to help achieve better use of resources, efficiency, cost-effectiveness, and sustainability. The book is intellectually rich and interesting as well as practical. The fundamental methods of hydrogen production are categorized based on type of energy source: electrical, thermal, photonic, and biochemical. Where appropriate, historical context is introduced. Thermodynamic concepts, illustrative examples, and case studies are used to solve concrete power engineering problems. - Addresses the fundamentals of hydrogen production using electrical, thermal, photonic, and biochemical energies - Presents new models, methods, and parameters for performance assessment - Provides historical background where appropriate - Outlines key connections between hydrogen production methods and environmental impact/sustainable development - Provides illustrative examples, case studies, and study problems within each chapter

Download or read book Methanol Tolerant Oxygen Reduction Catalysts Derived from Transition Metal Oxides written by Nina Katariina Beck and published by . This book was released on 2006 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalysts for Alcohol fuelled Direct Oxidation Fuel Cells written by Zhen-Xing Liang and published by Royal Society of Chemistry. This book was released on 2012 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a state-of-the-art review on recent advances in nanocatalysts and electrocatalysis in DOFCs.

Download or read book Metal Oxides in Heterogeneous Catalysis written by Jacques C. Vedrine and published by Elsevier. This book was released on 2018-01-11 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxides in Heterogeneous Catalysis is an overview of the past, present and future of heterogeneous catalysis using metal oxides catalysts. The book presents the historical, theoretical, and practical aspects of metal oxide-based heterogeneous catalysis. Metal Oxides in Heterogeneous Catalysis deals with fundamental information on heterogeneous catalysis, including reaction mechanisms and kinetics approaches.There is also a focus on the classification of metal oxides used as catalysts, preparation methods and touches on zeolites, mesoporous materials and Metal-organic frameworks (MOFs) in catalysis. It will touch on acid or base-type reactions, selective (partial) and total oxidation reactions, and enzymatic type reactions The book also touches heavily on the biomass applications of metal oxide catalysts and environmentally related/depollution reactions such as COVs elimination, DeNOx, and DeSOx. Finally, the book also deals with future trends and prospects in metal oxide-based heterogeneous catalysis. - Presents case studies in each chapter that provide a focus on the industrial applications - Includes fundamentals, key theories and practical applications of metal oxide-based heterogeneous catalysis in one comprehensive resource - Edited, and contributed, by leading experts who provide perspectives on synthesis, characterization and applications

Download or read book Oxidation of CO and Hydrocarbons Over Supported Transition Metal Oxide Catalysts written by Richard L. Klimisch and published by . This book was released on 1968 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New and Future Developments in Catalysis written by Steven L Suib and published by Newnes. This book was released on 2013-07-11 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: New and Future Developments in Catalysis is a package of seven books that compile the latest ideas concerning alternate and renewable energy sources and the role that catalysis plays in converting new renewable feedstock into biofuels and biochemicals. Both homogeneous and heterogeneous catalysts and catalytic processes will be discussed in a unified and comprehensive approach. There will be extensive cross-referencing within all volumes.Batteries and fuel cells are considered to be environmentally friendly devices for storage and production of electricity, and they are gaining considerable attention. The preparation of the feed for fuel cells (fuel) as well as the catalysts and the various conversion processes taking place in these devices are covered in this volume, together with the catalytic processes for hydrogen generation and storage. An economic analysis of the various processes is also part of this volume and enables an informed choice of the most suitable process. - Offers in-depth coverage of all catalytic topics of current interest and outlines future challenges and research areas - A clear and visual description of all parameters and conditions, enabling the reader to draw conclusions for a particular case - Outlines the catalytic processes applicable to energy generation and design of green processes

Download or read book The Oxidation of Methanol with Air Over Oxide Catalysts written by Wesley Rasmus Peterson and published by . This book was released on 1929 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: