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Author : Stefan Zander
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (863 download)
Download or read book Preparation and Characterization of Cu-ZnO Catalysts for Methanol Synthesis written by Stefan Zander and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 115 pages
Book Rating : 4.:/5 (914 download)
Download or read book Preparation and Characterization of Cu-ZnO Catalysts Form Methanol Synthesis written by and published by . This book was released on 2013 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stefan Zander
Publisher : Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN 13 : 9783838150208
Total Pages : 132 pages
Book Rating : 4.1/5 (52 download)
Download or read book Preparation and Characterization of Cu/Zno Catalysts written by Stefan Zander and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2014-12-23 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methanol is one of the most important industrial base chemicals and also a starting material for many organic syntheses. A steadily rising amount is used as fuel or fuel additive because methanol can serve as liquid hydrogen carrier. In the chemical industry, methanol is produced from synthesis gas over Cu/ZnO based catalysts. The catalyst is prepared by a multi-step synthesis (co-precipitation, calcination, reduction). Already in early stages of the preparation structural characteristics can provide indications for the resulting activity of the final catalyst. In order to investigate correlations between preparation parameters, microstructure and activity of Cu/ZnO based catalysts, the effects of the pH during co-precipitation and aging, use of MgO instead of ZnO and doping with Ga-ions were examined in the present work. Precursors, calcined and reduced samples were investigated with different methods (XRD, XRF, physisorption, TPR, RFC, UV-Vis spectroscopy, XAS, XPS, SEM, TEM) and selected samples were tested in methanol synthesis.
Author :
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ISBN 13 :
Total Pages : 177 pages
Book Rating : 4.:/5 (915 download)
Download or read book Systematic Studies to the Synthesis and Characterization of Cu - ZnO - ZrO 2 Catalysts and Variations with Elemental Fluorine - Precipitations in HF - TEOS written by and published by . This book was released on 2013 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (916 download)
Download or read book Microstructural Characterization of Cu-ZnO-Al 2 O 3 Catalysts for the Synthesis and Steam Reforming of Methanol written by and published by . This book was released on 2008 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gerhard Ertl
Publisher : John Wiley & Sons
ISBN 13 : 3527620680
Total Pages : 639 pages
Book Rating : 4.5/5 (276 download)
Download or read book Preparation of Solid Catalysts written by Gerhard Ertl and published by John Wiley & Sons. This book was released on 2008-08-29 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid catalysts play a fundamental role in all areas between basic research and industrial applications. This book offers a large amount of information about the preparation of solid catalysts. All types of solid catalysts and all important aspects of their preparation are discussed. The highly topical contributions are written by leading experts in disciplines ranging from solid state, interface and solution chemistry to industrial engineering. The straightforward presentation of the material and the comprehensive coverage make this book an essential and indispensible tool for every scientist and engineer working with solid catalysts.
Author : Jerzy Skrzypek
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.F/5 ( download)
Download or read book Methanol Synthesis written by Jerzy Skrzypek and published by . This book was released on 1994 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mahmoud Ashour Sliem
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (93 download)
Download or read book Preparation and Laser-aided Characterization of Metal Oxide, Metal/metal Oxide and Semiconductor Nanocolloids written by Mahmoud Ashour Sliem and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nurul Aini Mohamed Razali
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (953 download)
Download or read book Synthesis, Characterization and Catalytic Performance of Cu/ZnO/SBA-15 for Hydrogen of Carbon Dioxide to Methanol written by Nurul Aini Mohamed Razali and published by . This book was released on 2014 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Samuel M. Fehr
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (131 download)
Download or read book Surface Analysis of Cu/ZnO Catalysts for Methanol Synthesis - a Study on Nitrous Oxide Chemisorption and DRIFT Spectroscopy written by Samuel M. Fehr and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (921 download)
Download or read book Effect of Preparation Method on the Properties of Cu/ZnO Catalyst in Steam Reforming of Methanol written by and published by . This book was released on 2006 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several methods (sol-gel method, co-precipitation, homogeneous-precipitation) have been comparatively examined for the preparation of binary Cu/ZnO-based catalysts with Cu/Zn molar ratios in 70/30, 50/50 and 30/70 copper acetate (Cu(CH3COO)2H2O) and zinc acetate (Zn(CH3COO)2 2H2O) and ethanol were used as precursor for preparation of Cu/ZnO catalyst by sol-gel method. For co-precipitation method were prepared by the addition rate of a mixed copper nitrate (Cu(NO3)2) and zince nitrate (Zn(NO3)2) solution with a sodium carbonate (Na2CO3) solution. For homogeneous precipitation method were prepared by urea instead of Na2CO3 solution. All Cu/ZnO catalysts were applied for the catalytic production of hydrogen by steam reforming of methanol (SRM). Homogeneous precipitation method is preferable for this reaction. Then, study effect of calcinations conditions. Cu/ZnO catalysts are calcined by various atmospheres. Gases were used as atmosphere as follows: nitrogen, oxygen, air and hydrogen. Cu/ZnO catalyst was calcined by hydrogen, is the higher activity than the other atmospheres. Physical and chemical properties of Cu/ZnO catalyst were characterized by various techniques including X-ray diffraction (XRD), BET surface area, N2O chemisorption, Thermal gravimetric and differential thermal analysis (TG/DTA), Transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR).
Author :
Publisher :
ISBN 13 :
Total Pages : 151 pages
Book Rating : 4.:/5 (918 download)
Download or read book Synthesis and Characterization of Cu-based Catalysts Resulting from Cu,Zn,X Hydrotalcite-like Compounds written by and published by . This book was released on 2012 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Flora T. T. Ng
Publisher : MDPI
ISBN 13 : 303936040X
Total Pages : 270 pages
Book Rating : 4.0/5 (393 download)
Download or read book Catalysis for the Production of Sustainable Fuels and Chemicals written by Flora T. T. Ng and published by MDPI. This book was released on 2020-12-29 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysis, in the industrial production of chemicals, fuels, and materials, accounts for more than half of gross material production worldwide. Heterogeneous catalysis enables fast and selective chemical transformations, resulting in superior product yield and facilitating catalyst separation and recovery. The synthesis of novel catalysts has emerged as a hot topic for process and product development with numerous research publications and patents. Hence, development of efficient catalysts and their applications is important for sustainable energy production and use, green chemicals production and use, and economic growth. This Special Issue discusses recent developments related to catalysis for the production of sustainable fuels and chemicals and traverses many new frontiers of catalysis including synthesis, characterization, catalytic performances, reaction kinetics and modelling, as well as applications of catalysts for the production of biofuels, synthesis gas, and other green products. This covers the current state-of-the-art catalysis research applied to bioenergy, organic transformation, carbon–carbon and carbon–heteroatoms, reforming, hydrogenation, hydrodesulfurization, hydrodenitrogenation, hydrodemetalization, Fischer–Tropsch synthesis, to name a few. This book highlights new avenues in catalysis including catalyst preparation methods, analytical tools for catalyst characterization, and techno-economic assessment to enhance a chemical or biological transformation process using catalysts for a betterment of industry, academia and society.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Preparation, Characterization and Catalytic Performance of ZnO-SBA-15 Catalysts written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 31 pages
Book Rating : 4.:/5 (227 download)
Download or read book Surface Characterization of Cu-ion Implanted Single Crystal and Thin Film ZnO for Catalytic Applications written by and published by . This book was released on 1995 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single crystals and thin films of zinc oxide were implanted with copper ions in order to study the catalytic properties of a mixed Cu-ZnO system. ZnO is widely used as a catalyst in the methanol synthesis reaction, and copper has been noted to have a synergistic effect on the rates and yields of reaction. The samples were characterized by x-ray photoelectron spectroscopy (XPS) before and after implantation, and surface copper concentration in the implanted specimens was determined. Implanted samples were heated under oxidizing and reducing atmospheres and re-examined by XPS to determine the oxidation state of the implanted copper species. XPS results demonstrated that the oxidation state of the copper could be manipulated, although there was a corresponding decrease in the concentration of the surface copper ions, relative to temperature and time of heating. jg p.3.
Author : Samuel M. Fehr
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (131 download)
Download or read book Surface Analysis of Cu/ZnO Catalysts for Methanol Synthesis - a Study on Nitrous Oxide Chemisorption and DRIFT Spectroscopy written by Samuel M. Fehr and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (946 download)
Download or read book Adsorption and Deactivation Characteristics of Cu/ZnO-Based Catalysts for Methanol Synthesis from Carbon Dioxide written by and published by . This book was released on 2013 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The adsorption and deactivation characteristics of coprecipitated Cu/ZnO-based catalysts were examined and correlated to their performance in methanol synthesis from CO2 hydrogenation. The addition of Ga2O3 and Y2O3 promoters is shown to increase the Cu surface area and CO2/H2 adsorption capacities of the catalysts and enhance methanol synthesis activity. Infrared studies showed that CO2 adsorbs spontaneously on these catalysts at room temperature as both monoand bi-dentate carbonate species. These weakly bound species desorb completely from the catalyst surface by 200 °C while other carbonate species persist up to 500 °C. Characterization using N2O decomposition, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) with energy-dispersive X-ray spectroscopy (EDX) analysis clearly indicated that Cu sintering is the main cause of catalyst deactivation. Ga and Y promotion improves the catalyst stability by suppressing the agglomeration of Cu and ZnO particles under pretreatment and reaction conditions.
