|Statement||F.W. Zemicael ; supervised by K.C. Waugh.|
|Contributions||Waugh, K.C., Chemistry.|
It was found that the particle size, surface area, metallic copper surface area and composition of Cu/ZnO/A catalyst are important factors to the catalytic process. A linear relationship between the catalytic activity and the metallic copper surface area of the catalyst was * Corresponding by: Johan Anton, Janine Nebel, Huiqing Song, Christian Froese, Philipp Weide, Holger Ruland, Martin Muhler and Stefan Kaluza, Structure–activity relationships of Co-modified Cu/ZnO/Al2O3 catalysts applied in the synthesis of higher alcohols from synthesis gas, Applied Catalysis A: General, /, , (), (). Active sites and structure–activity relationships for methanol synthesis from a stoichiometric mixture of CO2 and H2 were investigated for a series of coprecipitated Cu-based catalysts with temperature-programmed reduction (TPR), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and N2O by: Structure–activity correlations of binary Cu/ZnO model catalysts were compared to microstructural properties of the ternary catalysts obtained from in situ experiments under MSR conditions. Similar to the binary system, in addition to a high specific copper surface area the catalytic activity of Cu/ZnO/Al 2 O 3 catalysts is determined by defects in the bulk by:
A kinetic model for methanol (MeOH) synthesis over Cu/ZnO/Al2O3/ZrO2 catalyst has been developed and selected to evaluate the effect of carbon dioxide on the reaction rates due to its high activity and stability. Detailed kinetic mechanism, on the basis of different sites on Cu for the adsorption of carbon monoxide and carbon dioxide, is applied, and the water−gas shift (WGS) reaction is Cited by: tion of synthesis gas (mixture of H 2,CO,and CO 2) into methanol. Methanol is consumed at the scale of 65 million tons/year () and con-sidered as a future energy carrier (3). The typical catalyst consists of Cu NPs mixed with NPs of ZnO and Al 2O 3. Although Cu can function alone as a methanol synthesis catalyst, its activity is. A systematic investigation of the advantages of precipitation-reduction method over conventional co-precipitation method, the effect of NaBH 4 content on the structure and physicochemical properties is conducted to shed light into the structure-activity relationship of CO 2 hydrogenation to methanol in Cu/ZnO/ZrO 2 system. 2. Experimental Cited by: A series of industrial related Cu/ZnO/Al2O3 methanol catalysts with different compositions were prepared by parallel coprecipitation method at neutral condition. The structural properties were characterized through BET, XRD, TEM, TPD and TPR, and the catalytic performances were evaluated on a 4-tube stainless steel continuous flow fixed-bed by: 8.
Cu/ZnO/Al2O3 impregnation catalysts were studied for their copper surface area (reactive chemisorption of nitrous oxide) and catalytic activity for the synthesis of methanol from a CO/ H2 mixture. The activity of the catalysts was tested for methanol synthesis from CO 2 hydrogenation. It is found that the increase in the Zn/Zr ratio could lead to the sintering of the catalysts, destroying the macroporous structure integrity. The macroporous CZZ catalysts own lower Zn/Zr ratio, exhibiting a better morphology and by: 2. We show how to identify the crucial atomic structure motif for the industrial Cu/ZnO/Al(2)O(3) methanol synthesis catalyst by using a combination of experimental evidence from bulk, surface-sensitive, and imaging methods collected on real high-performance catalytic systems in combination with density functional theory by: We show how to identify the crucial atomic structure motif for the industrial Cu/ZnO/Al2O3 methanol synthesis catalyst by using a combination of experimental evidence from bulk, surface-sensitive.