Ethanol steam reforming catalysts prepared from copper-nickel nanoparticles : Effect of preparation parameters

• Main Authors: Hui -chun Tsao, 曹惠珺
• Other Authors: Shawn D. Lin
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/b3n2q7

碩士 === 國立臺灣科技大學 === 化學工程系 === 100 === In this study, 5% CuNi/SiO2 catalyst were prepared by NaBH4 reduction in the presence of PVP. Two preparation procedures were used, one is with SiO2 addition to PVP+precursor solution followed by NaBH4 reduction (Method A) and the other with SiO2 addition after NaBH4 reduction of PVP+precursor solution (Method B).XRD results showed that all catalysts had FCC diffraction characteristics and the (111) peak position shifted to higher 2θ when the Cu/Ni ratio decreased.The catalysts prepared by method B had smaller CuNi particle size than those by method A. The catalysts prepared by method A had lower tendency to sinter than those by method B and it is attributed to the presence of NiO-SiO2 interaction. The effect of copper/nickel ratio on the ethanol steam reforming reaction was examined after in-live H2 reduction at 350 oC. The catalysts with Cu/Ni=1 showed the best ethanol conversion, high CO conversion, good hydrogen, and low coking tendency. The catalysts by method B had better overall performance than A method catalysts. The preparation method B was applied for CuNi catalysts of Cu/Ni=1 using different supports. Cu1Ni1/ZnO catalyst showed high ethanol activity, the highest hydrogen yield, and low coking tendency minimum.