Promotion of Copper-Zinc Catalyst with Sm and Gd for Steam Reforming of Methanol

• Main Authors: Wang-Ting Hong, 洪琬婷
• Other Authors: 林錕松
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/18547724751213607281

碩士 === 元智大學 === 化學工程與材料科學學系 === 99 === Recently, all of country accelerated the development of renewable resources. One of the promising renewable resources is hydrogen. Hydrogen is expected to play a major role in the future as a carbon free energy carrier. Steam reforming of methanol (SRM) is a reaction which may produce hydrogen for fuel cell application. Steam reforming of methanol was carried out over Cu-Zn catalysts prepared via the co-precipitation (CP) method. In this study, the addition of Sm and Gd in the catalyst composition affected the catalytic performance are developing. These metal oxides improved the activity of Cu–Zn catalysts, increase the selectivity of hydrogen and decrease concentration of CO. The advantage of Sm and Gd promotion have been characterized by techniques of the temperature programmed reduction (TPR), XRD, SEM, ASAP, and GC-TCD. XRD analysis of Gd and Sm doped catalysts showed that addition of dopants leads to increase of copper oxide dispersion. The reduction temperature of catalysts decreased from 230 to 190 oC due to the Sm and Gd promotion. The performance of catalysts was estimated from temperature required for 95% methanol conversion (T95) in SRM reaction. Consequently, T95 was significantly decreased to 240 oC.