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Physico Chemical And Catalytic Properties Of Ceo2 Zro2 Solid Solutions Supported And Dispersed On Gamma Al2o3
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Book Synopsis Physico-chemical and Catalytic Properties of CeO2-ZrO2 Solid Solutions Supported and Dispersed on [gamma]-Al2O3 by : John G. Nunan
Download or read book Physico-chemical and Catalytic Properties of CeO2-ZrO2 Solid Solutions Supported and Dispersed on [gamma]-Al2O3 written by John G. Nunan and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Non-Stoichiometry in the Functional Properties of Oxide Materials by : Maria Veronica Ganduglia-Pirovano
Download or read book The Role of Non-Stoichiometry in the Functional Properties of Oxide Materials written by Maria Veronica Ganduglia-Pirovano and published by Frontiers Media SA. This book was released on 2019-12-09 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cerium Oxide written by Sher Bahadar Khan and published by BoD – Books on Demand. This book was released on 2019-01-23 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the chemical structure and applications of CeO2. It covers the recent developments in a wide range of CeO2 applications, particularly catalysis corrosion protection, fuel cells, sensors, and UV-blocking. It also provides a concise but thorough coverage of the chemical structure and applications of CeO2. Thus, this book provides an overview of chemical structure, applications, and recent attributes of CeO2 for a broad audience, including beginners, graduate students, and specialists in both academic and industrial sectors.
Book Synopsis Cerium Oxide (CeO2): Synthesis, Properties and Applications by : Salvatore Scire
Download or read book Cerium Oxide (CeO2): Synthesis, Properties and Applications written by Salvatore Scire and published by Elsevier. This book was released on 2019-08-21 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cerium Oxide (CeO2): Synthesis, Properties and Applications provides an updated and comprehensive account of the research in the field of cerium oxide based materials. The book is divided into three main blocks that deal with its properties, synthesis and applications. Special attention is devoted to the growing number of applications of ceria based materials, including their usage in industrial and environmental catalysis and photocatalysis, energy production and storage, sensors, cosmetics, radioprotection, glass technology, pigments, stainless steel and toxicology. A brief historical introduction gives users background, and a final chapter addresses future perspectives and outlooks to stimulate future research. The book is intended for a wide audience, including students, academics and industrial researchers working in materials science, chemistry and physics. Addresses a wide range of applications of ceria-based materials, including catalysis, energy production and storage, sensors, cosmetics and toxicology Provides the fundamentals of ceria-based materials, including synthesis methods, materials properties, toxicology and surface chemistry Includes nanostructured ceria-based materials and a discussion of future prospects and outlooks
Book Synopsis Characterization and Design of Zeolite Catalysts by : Miki Niwa
Download or read book Characterization and Design of Zeolite Catalysts written by Miki Niwa and published by Springer Science & Business Media. This book was released on 2010-08-17 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysis and catalyst is a key technology to solve the problems in energy and environment issues to sustain our human society. We believe that comprehensive understanding of the catalysis and catalyst provides us a chance to develop a new catalyst and contributes greatly to our society. However, the ?eld of heterogeneous catalyst is dif?cultto study andstill stays behindmoredeveloped?elds ofchemistry such as organic and physical chemistries. This is a dilemma to the chemists who study the catalysis and catalyst. While we can accomplish the progress in the - dustrial application, the scienti?c understandingis not complete yet. A gap between the useful application and incomplete scienti?c understanding, however, becomes smaller and smaller in recent years. Because zeolites are ?ne crystals, and the structure is clearly known, the study on the catalysis using the zeolites is easier than those encountered in other catalysts such as metals and metal oxides. Very fortunately, zeolites provide us the strong acidity with the ?ne distribution which enables various useful catalytic reactions. When some metals and cations are loaded in close to the acid sites, these loadede- ments show extraordinarycharacters, and many catalytic reactions proceed thereon.
Book Synopsis CO Oixdation on CeO2-ZrO2 Solid Solution Prepared by Sol-gel Technique Under Oxidizing and Reducing Conditions by : Matina Thammachart
Download or read book CO Oixdation on CeO2-ZrO2 Solid Solution Prepared by Sol-gel Technique Under Oxidizing and Reducing Conditions written by Matina Thammachart and published by . This book was released on 2000 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Catalysis by : F J J G Janssen
Download or read book Environmental Catalysis written by F J J G Janssen and published by World Scientific. This book was released on 1999-04-14 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together highlights of a theme which is growing in interest: the creation of a sustainable society using catalysis as the main tool. Catalysts play key roles in the production of clean fuels, the conversion of waste and green raw materials into energy, clean combustion engines including control of NOx and soot production and reduction of greenhouse gases, production of clean water and of polymers, as well as reduction from polymers to monomers. Catalysts are also of prime importance in the developing H2 and syngas production technology, aimed at producing clean fuels for the coming decades. And catalysts can be recycled.
Book Synopsis Supported Catalysts and Their Applications by : David C Sherrington
Download or read book Supported Catalysts and Their Applications written by David C Sherrington and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need to improve both the efficiency and environmental acceptability of industrial processes is driving the development of heterogeneous catalysts across the chemical industry, including commodity, specialty and fine chemicals and in pharmaceuticals and agrochemicals. Drawing on international research, Supported Catalysts and their Applications discusses aspects of the design, synthesis and application of solid supported reagents and catalysts, including supported reagents for multi-step organic synthesis; selectivity in oxidation catalysis; mesoporous molecular sieve catalysts; and the use of Zeolite Beta in organic reactions. In addition, the two discrete areas of heterogeneous catalysis (inorganic oxide materials and polymer-based catalysts) that were developing in parallel are now shown to be converging, which will be of great benefit to the whole field. Providing a snapshot of the state-of-the-art in this fast-moving field, this book will be welcomed by industrialists and researchers, particularly in the agrochemicals and pharmaceuticals industries.
Book Synopsis Effect of the preparation conditions on the characteristics of the ceo2-zro2 mixed oxides prepared by coprecipitation method by :
Download or read book Effect of the preparation conditions on the characteristics of the ceo2-zro2 mixed oxides prepared by coprecipitation method written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Os óxidos mistos CeO2-ZrO2 são utilizados como suporte de catalisadoresautomotivos devido a sua capacidade de estocar e liberar oxigênio em condiçõespobres ou ricas de combustível, respectivamente, a fim de auxiliar nas reaçõesredox que minimizam a emissão de poluentes oriunda da queima incompleta docombustível. Neste trabalho, os óxidos mistos CeO2-ZrO2 foram preparados pelométodo de coprecipitação, utilizando-se como sais precursores o ZrO(NO3)2 e o(NH4)2Ce(NO3)6 ou Ce(NO3)3 com a finalidade de se observar a influência do salprecursor de cério no sistema CeO2-ZrO2. Além disso, investigou-se o efeito dealgumas condições de preparação como o envelhecimento do precipitado, ocontrole de pH durante a síntese, a secagem e o envelhecimento térmico nosóxidos mistos obtidos. Os resultados mostram que a variável mais significante napreparação dos óxidos mistos CeO2-ZrO2 por coprecipitação é o sal precursor decério. Em todas as amostras preparadas a partir do precursor de cério IV houve aformação de solução sólida, enquanto que no caso das amostras preparadas apartir do precursor de cério III observou-se a formação de duas fases segregadas, c-CeO2 e t-ZrO2. Além disso, concluiu-se que a redução do material obtido nãoocorre somente na superfície, mas também na parte mássica e que os materiaisformados por solução sólida são os que apresentam melhor capacidade dearmazenamento de oxigênio o que é muito importante para o uso em catalisadoresautomotivos. O envelhecimento térmico do catalisador mostrou que há umasinterização devido à alta temperatura e que também há uma segregação dasolução sólida quando esta foi submetida às condições de envelhecimentoutilizadas.
Book Synopsis Catalysis by Ceria and Related Materials by : Alessandro Trovarelli
Download or read book Catalysis by Ceria and Related Materials written by Alessandro Trovarelli and published by World Scientific. This book was released on 2013 with total page 909 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book follows the 2002 edition of Catalysis by Ceria and Related Materials, which was the first book entirely devoted to ceria and its catalytic properties. In the ten years since the first edition a massive amount of work has been carried out in the field, and ceria has gained a prominent position in catalysis as one of the most valuable material for several applications. This second edition covers fundamental and applied aspects of the latest advances in ceria-based materials with a special focus on structural, redox and catalytic features. Special emphasis is given to nano-engineered and nano-shaped systems which are a key factor in the predictive and rational design of ceria with novel properties.In addition, the book presents recent advances in emerging and traditional large-scale applications of ceria in catalysis, such as the treatment of emissions from mobile sources (including diesel and gasoline engines). The primary readership includes catalysis and material science researchers from academy and industry and postdoctorate and graduate students in chemistry, chemical engineering and physics.
Book Synopsis Supported Metals in Catalysis by : James Arthur Anderson
Download or read book Supported Metals in Catalysis written by James Arthur Anderson and published by World Scientific. This book was released on 2012 with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from experts in supported metal catalysis, from both the industry and academia, this book presents the latest developments in characterization and application of supported metals in heterogeneous catalysis. In addition to a thorough and updated coverage of the traditional aspects of heterogeneous catalysis such as preparation, characterization and use in well-established technologies such as Naphtha reforming, the book also includes emerging areas where supported metal catalysis will make significant contributions in future developments, such as fuel cells and fine chemicals synthesis. The second edition of Supported Metals in Catalysis comes complete with new and updated chapters containing important summaries of research in a rapidly evolving field. Very few other books deal with this highly pertinent subject matter, and as such, it is a must-have for anyone working in the field of heterogeneous catalysis.
Book Synopsis Methanol: The Basic Chemical and Energy Feedstock of the Future by : Martin Bertau
Download or read book Methanol: The Basic Chemical and Energy Feedstock of the Future written by Martin Bertau and published by Springer Science & Business Media. This book was released on 2014-02-18 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methanol - The Chemical and Energy Feedstock of the Future offers a visionary yet unbiased view of methanol technology. Based on the groundbreaking 1986 publication "Methanol" by Friedrich Asinger, this book includes contributions by more than 40 experts from industry and academia. The authors and editors provide a comprehensive exposition of methanol chemistry and technology which is useful for a wide variety of scientists working in chemistry and energy related industries as well as academic researchers and even decision-makers and organisations concerned with the future of chemical and energy feedstocks.
Book Synopsis Catalytic Combustion by : Sophie A. Cottilard
Download or read book Catalytic Combustion written by Sophie A. Cottilard and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalytic combustion has been developed as a method of promoting efficient combustion over a wide range of air-to-fuel ratios with a minimum pollutant formation at low temperatures as compared to conventional flame combustion. In this book, the authors present current research in the study of catalytic combustion including commercial and industrial research in combustion and fluidisation engineering; the catalytic combustion of soot; using metal oxides to improve catalytic efficiency; catalytic combustion in the removal of pollutants from exhaust gases and in the energy conversion field and the catalytic combustion of methane using ceria-zirconia.
Download or read book Ceramic Abstracts written by and published by . This book was released on 2000 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Kinetic Study of CeO2 and SiO2 Supported CuO Catalysts for CO Oxidation by : Shaikh Tofazzel Hossain
Download or read book Synthesis and Kinetic Study of CeO2 and SiO2 Supported CuO Catalysts for CO Oxidation written by Shaikh Tofazzel Hossain and published by . This book was released on 2018 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape- and size-controlled CeO2 and SiO2 have been used in many catalysis applications. This research focused on the low-temperature CO oxidation for the automotive exhaust system. After starting a car, it needs to increase the temperature of catalytic converter to achieve full CO conversion. Toxic gas from the car pollutes the environment till the car reaches the required temperature. Thus, the preparation of efficient catalyst is much needed to lower the CO conversion temperature. This work especially focused on the correlation of the effect of catalyst supports' kind and morphology with their catalytic activity. Copper nitrate and copper carbonate precursors for wet impregnation method and copper nitrate for thermal decomposition method have been used to impregnate CuO onto hydrothermally prepared CeO2 nanorods. Several characterization techniques, such as X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM) and hydrogen temperature programmed reduction (H2-TPR) have confirmed the presence of three different copper species interacting with CeO2 nanorods while forming oxygen vacancies in CeO2 lattice by compensating the charges between copper and cerium. Cu-O-Ce solid solutions and CuO impregnated on CeO2 nanorods catalysts (CuO/CeO2) with various compositions have been prepared using thermal decomposition and hydrothermal methods, to understand the distribution effect of copper species on low temperature CO oxidation. A series of temperature programmed reduction-temperature programmed oxidation (TPR-TPO) thermal cycling studies have been conducted to understand the interactions between three assigned copper species with CeO2 support and the corresponding catalytic performance of the catalysts. The effect of support reducibility and reduction treatment has been studied in SiO2 nanospheres and CeO2 nanorods supported CuO[subscript x] catalysts on CO oxidation. CuO nanoparticles have been impregnated on SiO2 nanospheres and CeO2 nanorods using thermal decomposition method and then the samples have been oxidized in air at different temperatures (400-600 °C). The sample oxidized at 400 °C has also been further reduced under hydrogen atmosphere to compare the effect of thermal treatment (oxidation vs. reduction treatments) on the catalytic activity. In comparison to SiO2 nanospheres supported CuO[subscript x] catalysts, both CuO/CeO2 and reduced CuO[subscript x]/CeO2 catalysts exhibited superior catalytic performance in terms of CO conversion and low-temperature hydrogen consumption. The enhanced activity of CeO2 nanorods supported CuO[subscript x] catalysts has been correlated strongly to the surface defects on CeO2 nanorods and interfacial structures. In addition, in a novel design of co-supported scaffold structure catalyst, CeO2 nanorods and SiO2 nanospheres have been mixed in various ratios and 10 wt% CuO nanoparticles have been impregnated onto CeO2-SiO2 composite support using thermal decomposition method. Agglomeration of CeO2 nanorods have been stopped by introducing SiO2 nanospheres in the catalyst system, and this design can increase the chance to expose more CeO2 surface to CuO nanoparticles in order to form higher amount of surface defects (incorporation of Cu ions and oxygen vacancies) and lead to higher synergistic interaction between CuO and CeO2. H2 TPR and CO oxidation experiments suggested an enhanced low-temperature catalytic performance for 1:1 ratio mixture of CeO2 and SiO2 due to a strong interfacial interaction among SiO2-CeO2-CuO. For kinetic study, 5%CO-95%He and O2 gases have been used to reduce and oxidize CuO/CeO2 catalyst respectively at a constant temperature of 400 °C (isothermal process). Mathematical formulas for power law, diffusion, nucleation and contraction models have been used to compare with the experimental data collected during the reduction and oxidation process of the catalyst to determine the best fitted reaction mechanism.
Book Synopsis Enhancing Low-temperature Activity and Durability of Pd-based Diesel Oxidation Catalysts Using ZrO2 Supports by :
Download or read book Enhancing Low-temperature Activity and Durability of Pd-based Diesel Oxidation Catalysts Using ZrO2 Supports written by and published by . This book was released on 2016 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, we investigated the impact of ZrO2 on the performance of palladium-based oxidation catalysts with respect to low-temperature activity, hydrothermal stability, and sulfur tolerance. Pd supported on ZrO2 and SiO2 were synthesized for a comparative study. Additionally, in an attempt to maximize the ZrO2 surface area and improve sulfur tolerance, a Pd support with ZrO2-dispersed onto SiO2 was studied. The physicochemical properties of the catalysts were examined using ICP, N2 sorption, XRD, SEM, TEM, and NH3-, CO2-, and NOx-TPD. The activity of the Pd catalysts were measured from 60 to 600 °C in a flow of 4000 ppm CO, 500 ppm NO, 1000 ppm C3H6, 4% O2, 5% H2O, and Ar balance. The Pd catalysts were evaluated in fresh, sulfated, and hydrothermally aged states. Overall, the ZrO2-containing catalysts showed considerably higher CO and C3H6 oxidation activity than Pd/SiO2 under the reaction conditions studied.
Book Synopsis Sonochemical Reactions by : Selcan Karakuş
Download or read book Sonochemical Reactions written by Selcan Karakuş and published by BoD – Books on Demand. This book was released on 2020-03-25 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was written by authors in the field of ultrasound-assited synthesis and their applications. Among others, some of the topics covered are: ultrasound-assited synthesis of metal/metal oxide nanoparticles, graphene nanosheets, and ultrasound applications. In this book, authors focused on recent studies, applications, and new technological developments on fundamental properties of the ultrasound process.
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