A Comprehensive Kinetic Model of Methanol-steam Reforming on Cu/ZnO/AlŒ2OŒ3 Catalyst PDF Download
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Languages : en
Pages :
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Author:
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Languages : en
Pages :
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Author: Brant Anthony Davis Peppley
Publisher:
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Category :
Languages : en
Pages : 0
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Author: Gregor Koch
Publisher: Logos Verlag Berlin
ISBN: 9783832541316
Category : Metal catalysts
Languages : en
Pages : 0
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Book Description
In this book, the Cu/SBA-15 model catalyst for methanol steam reforming is described in detail. This study is an exemplarily road map for investigating model catalysts. The mesoporous structure of SBA-15 support, the structure of supported copper nanoparticles and their activity with regard to H2 production are presented. Based on that, structure activity correlations are deduced. Moreover, relationships between the structure of precursors and the structure of active catalysts are deduced. Therefore several analytical are presented: N2 Physisorption, DR-UV/Vis, in situ XANES, TPR, in situ XRD, specific copper surface area (N2O), size and strain analysis of copper nanoparticles, H2 production by methanol steam reforming.The reliable analysis procedure of each experimental method is described and can be principally employed on similarly constructed catalysts.
Author: Daaniya Rahman
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659215421
Category :
Languages : en
Pages : 88
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Book Description
Methanol offers many benefits as an alternative energy source and is of use in a multitude of applications, therefore, optimizing and enhancing its production by modeling its reaction kinetics could be of considerable importance. Due to the disagreement on the methanol synthesis reaction scheme, there is always a scope to develop new and effective kinetic models which can prove to be useful in the improvement of the process resulting in high methanol yields and greater profits. The main purpose of this study was to investigate kinetic models proposed in the literature for methanol synthesis and select the best fit model using regression techniques in POLYMATH. Another aim was to use the results from the best fit model to explain some aspects and resolve some questions related to methanol synthesis kinetics. The statistical results from POLYMATH were used for comparison of the models and selection of the best fit kinetic model.
Author:
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Category :
Languages : en
Pages : 364
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Author: Ta Jen Huang
Publisher:
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Category :
Languages : en
Pages : 6
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Kinetics of partial oxidation and steam reforming of methanol have been studied over a Cu-ZnO catalyst of Cu30Zn70 in a continuous-flow reactor. Rate equations and possible mechanisms are presented for both reactions. It is concluded that dissociative adsorption of methanol is the rate-determining step for either reaction. In addition, the effect of oxygen has been studied in a pulse reactor and the result confirms the rate equation for partial oxidation of methanol. [Authors' abstract].
Author: Weiqiang Cao
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages :
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Author:
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ISBN:
Category :
Languages : en
Pages : 108
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Author:
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ISBN:
Category : Catalysts
Languages : en
Pages : 180
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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).
