Download or read book Synthesis Modification and Characterization of Supported Gold Catalysts for Selective Hydrogenation of Acetylene in Presence of Ethylene written by Tejaswi Bhavanam and published by . This book was released on 2014 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of Supported Gold on Titania Catalysts and Modification with Non thermal Plasma for Selective Hydrogenation of Acetylene in Large Excess of Ethylene written by Arjun Malipeddi and published by . This book was released on 2013 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selective Hydrogenation of Acetylene in the Presence of Ethylene Over Supported Pd and Pd Mg Catalysts written by Ying Ji and published by . This book was released on 2009 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Gold Catalyzed Synthesis written by A. Stephen K. Hashmi and published by John Wiley & Sons. This book was released on 2012-05-21 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its impressive features, gold has led to completely new reaction types in recent years, which in turn have strongly influenced both organic catalysis and material science. Other fields where a significant amount of new results has been obtained include nanotechnology, self assembly/supramolecular systems and biochemical/medicinal chemistry. As a result, gold is one of the hottest topics in catalysis at the moment, with an increasing amount of research being carried out in this field. While focusing on homogeneous catalysis, this monograph also covers the main applications in heterogeneous catalysis. Following a look at the gold-catalyzed addition of heteroatom nucleophiles to alkynes, it goes on to discuss gold-catalyzed additions to allenes and alkenes, gold-catalyzed benzannulations, cycloisomerization and rearrangement reactions, as well as oxidation and reduction reactions. The whole is finished off with a section on gold-catalyzed aldol and related reactions and the application of gold-catalyzed reactions to natural product synthesis. Of interest to synthetic chemists and inorganic chemists, as well as organic chemists working in homogeneous catalysis, physical and technical chemists.
Download or read book CeO2 supported Gold Catalysts for CO Oxidation written by Veronica Illeana Aguilar-Guerrero and published by . This book was released on 2008 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectroscopic Characterization of Supported Gold Complexes and Clusters as Functioning Catalysts for Ethylene Hydrogenation and CO Oxidation written by Javier Guzman and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supported Gold Catalysts for Environmental Applications written by Rudie Johan Hendrik Grisel and published by . This book was released on 2002 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Catalysis Over Gold based Materials written by George Avgouropoulos and published by Royal Society of Chemistry. This book was released on 2013 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the major developments in hydrogen-related catalytic and electrocatalytic reactions over gold-based materials over the last decade, including many of the advances made by academic and industrial researchers. Gold-based catalysts with potentially exciting new applications in hydrogen technology (e.g. purification of hydrogen, anode/cathode electrodes) are being investigated at a much higher rate than even before. A variety of techniques to synthesize, characterize and evaluate these materials is being employed. The book will be of interest to all those working in catalysis/green chemistry, in particular, to advanced level researchers in catalysis using gold-based materials. It is hoped that specialists in one reaction will read with interest the chapters on the neighbouring expertise. The book is also meant for PhD-students and advanced students interested in this area.
Download or read book Surface Chemistry and Catalysis written by Albert F. Carley and published by Springer Science & Business Media. This book was released on 2002-09-30 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exciting results are still emerging from the many research groups working in this fertile area and the book is an excellent stimulus to researchers at the start of the 21st century."--BOOK JACKET.
Download or read book Investigation of Palladium ceria Catalysts for Selective Hydrogenation of Acetylene in Ethylene written by Tengteng Lyu and published by . This book was released on 2018 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Pd Ag AI2O3 Selective Acetylene ethylene Hydrogenation Catalyst written by Piyaporn Pongbhai and published by . This book was released on 1997 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Gallium Promoted Pd TiO2 Catalysts for the Selective Hydrogenation of Acetylene in the Presence of Ethylene written by Luis Fabián Peña-Orduña and published by . This book was released on 2014 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Pd ceria Catalysts for Selective Hydrogenation of Acetylene in Ethylene written by Wentao Xie and published by . This book was released on 2017 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Gold Catalysts for Methanol Synthesis written by Tracey Van Heerden and published by . This book was released on 2012 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The activity (per mass of catalyst) of supported gold catalysts across a range of reduction and oxidation reactions is significantly affected by the average crystallite size of the gold crystallites in the catalyst. Supported gold catalysts are most commonly characterized for particle size using TEM and XRD. Both of these methods can have a large degree of inaccuracy associated with them at low metal loadings and for catalysts containing small gold crystallites. In this study oxygen chemisorption was used as an additional method to characterize supported gold catalysts to complement electron microscope techniques. Agreement between the results from these different methods was obtained only with regard to the order of magnitude range of crystallite size. The oxygen chemisorption can be used to estimate the mass fraction of gold present as nano-crystallites (typically less than 1%) implying a large room for improvement in catalyst preparation technique. In this study a range of supported gold catalysts were prepared by ion exchange, varying a range of preparation variables, including gold concentration in the precursor solution, washing procedure using an aqueous ammonia solution, as well as drying and calcination procedures. The washing procedure and in particular the concentration of ammonia and the duration affected the final metal loading of the catalyst. TEM analyses show crystallite size distributions between 2-5nm for all catalysts excepting those which were not washed using an aqueous ammonia solution and which did not show any small crystallites. Only the total omission of the ammonia wash resulted in a significant change in the gold crystallite sizes observed on TEM-images. Further characterization with SEM showed that catalysts that appeared identical on the TEM-images also contained large 50-500nm crystallites. This additional method of characterisation using SEM allowed for the identification of significant differences between catalysts upon varying the preparation methods. Catalyst drying was also shown to be a crucial step in the catalyst preparation method, with SEM images displaying only small well-distributed gold crystallites for catalysts dried in the rotary evaporator. Two of the catalysts were then tested for their activity and selectivity in the hydrogenation of CO or CO 2. Although it has been shown that the production of methanol from CO (and CO 2) can be catalysed by gold particles with crystallite sizes below 5nm (Haruta, 1997), this reaction has received comparatively little attention compared to the more extensively studied CO oxidation reaction. Testing was done over a range of temperatures (200 - 350°C) at a pressure of 30bar. The obtained methanol yields and selectivities are comparable to reported values in literature. The hydrogenation of CO 2 was shown to have higher yields and selectivities to methanol than the hydrogenation of CO over the same catalyst. The preparation of the catalyst was shown to have an effect on the activity and selectivity, with the catalyst dried in the rotary evaporator having a higher yield and selectivity to methanol, while also forming a larger variety of products than the catalyst dried in the oven.
Download or read book New and Future Developments in Catalysis written by Ana Primo and published by Elsevier Inc. Chapters. This book was released on 2013-07-13 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development of Supported Gold Catalysts for Selective Hydrogenation Applications written by Fernando Cardenas-Lizana and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Supported Gold Platinum gold and Platinum Catalysts for Hydrogenation Reactions written by Eveline Bus and published by . This book was released on 2007 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
