| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 101 === In order to compare cu-zn interface with cu-ce interface on kinetic analysis of methanol steam reforming, Cu/ZnO/MgO/Al2O3 and Cu/CeO2 with highly cu dispersion is selected as cu-zn interface catalyst and cu-ce interface catalyst. With analysis of XPS, AES, EXAFS, TPR and N2O, the features and activation area of this two kind of catalysts are realized. The results of methanol steam reforming show TOF of CuO/ZnO/MgO/Al2O3 catalyst is a little higher than Cu/CeO2.
Further to compare CuO/ZnO/MgO/Al2O3 with Cu/CeO2 on features of methanol steam reforming reaction, 10Cu/CeO2 is selected to compare with CuO/ZnO/MgO/Al2O3. Features on kinetic analysis of cu-zn catalyst and cu-ce catalyst are analyzed at different Pmethanol and Pwater. Methanol reaction order of cu-zn catalyst and cu-ce catalyst is 0.83 and 0.75, and water reaction order is -0.4 and -0.01. Selecting rate equations, reported on literatures, then equations are fitted with data of this study. The rate determine step of two catalysts both are methoxy decomposition reaction. Because effect of cu-zn interface and cu-ce interface are different, the cu-zn catalyst fits the mechanism with one kind of active site, and cu-ce catalyst fits the mechanism with two kinds of active site.
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