Performance of <scp>Cu‐Ce</scp> / <scp>M‐Al</scp> (M = Mg, Ni, Co, Zn) hydrotalcite derived catalysts for hydrogen production from methanol steam reforming
Weijun Qiao, Shuqian Yang, Lei Zhang, Yuan Tian, Honghao Wang, Caishun Zhang, Zhixian Gao
Abstract
M-Al (M = Mg, Ni, Co, Zn) hydrotalcite was synthesized on the surface of the γ-Al2O3 carrier, and hydrotalcite was calcined to corresponding carrier. Then, A series of Cu-Ce/M-Al catalysts were prepared by the sequential dip method. The catalysts were characterized by the means of XRD, BET, H2-TPR, and XPS, which investigated the effects of different divalent metals M on the structure, properties, and catalytic performance of hydrotalcite derived catalysts for hydrogen production from methanol steam reforming. The main reasons for different effects on the performance of catalysts lie in the difference of the dispersion, reduction temperature, and the content of oxygen vacancies on the surface. Among them, Ce-Cu/Zn-Al catalyst had the best performance. When the reaction temperature was 250°C, the molar ratio of water to methanol was 1.2, and the space velocity of methanol gas was 800 hours−1, the methanol conversion reached 100%, and the H2 production rate was 779.7 STP cm3 kg−1 s−1.