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URN etd-0816106-120546 Statistics This thesis had been viewed 2945 times. Download 1523 times. Author Dong-He Jeng Author's Email Address No Public. Department Chemical Engineering Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 78 Title Co-Ni metal catalysts for steam reforming of ethanol Keyword ethanol steam reforming ethanol steam reforming Abstract The objective of this research was to investigate the Co-Ni bimetal catalysts applied in the ethanol steam reforming to produce hydrogen to substitute for fossil fuel. In this research, we prepared Co-Ni/ Al2O3、Co-Ni/MgO、Co-Ni/MgO-Al2O3、Co/MgO-Al2O3、Ni/MgO-Al2O3、Co-Ni-K/MgO-Al2O3 catalysts by co-impregnation. Using TPR, XRD, and BET analyzed the characteristic of catalysts, and study the effect of Co-Ni bimetal, MgO-Al2O3 supported, K promoter on reduction temperature, crystal phase and crystalline size, and surface area. The reaction was carried out in fixed-bed reactor with designed temperature( 550℃ - 750℃ ) and ambient pressure. And the products were sent by the way on-line method into GC for analysis.
The results show the decrease of catalysts surface area was due to the blockage of partial small pores by Co-Ni particles. For the activity of steam reforming reaction, we find the K-Co-Ni/MgO-Al2O3 possess the highest conversion (94.8%) and hydrogen selectivity (73.2%).
Advisor Committee Ien-Whei Chan - advisor
Feg-Wen Chang - co-chair
Li-Tang Teng - co-chair
Files Date of Defense 2006-07-25 Date of Submission 2006-08-16