Improved methanol synthesis from CO2 hydrogenation over CuZnAlZr catalysts with precursor pre-activation by formaldehyde
Improved methanol synthesis from CO2 hydrogenation over CuZnAlZr catalysts with precursor pre-activation by formaldehyde
复制标题
通过甲醛预活化的 CuZnAlZr 催化剂改进 CO2 加氢合成甲醇
DOI：
10.1016/j.jcat.2019.09.025
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发表时间：
2019-11-01
影响因子：
7.3
通讯作者：
Xu, Qi
中科院分区：
文献类型：
--
作者：
Hou, Xiao-Xiao;Xu, Cheng-Hua;Xu, Qi
Formaldehyde (FA) was introduced into precursor slurries of CuZnAlZr catalysts (CZAZ) from co-precipitation in order to improve its catalytic performance in CO2 hydrogenation to methanol. The obtained CZAZ catalysts with and without FA pre-activation were characterized by X-ray photoelectron spectroscopy, H-2 temperature-programmed reduction, X-ray diffraction, N2O-H-2 titration, N-2 adsorption-desorption, scanning electron microscopy and transmission electron microscope, respectively. The results indicated that FA pre-activation led to Cu2+ reduction to Cu+ in CZAZ precursors. After calcination in N-2 the copper components existed in state of Cu2O, which could provide highly-dispersed active Cu-0 particles with a weak interaction between metal and supports. Meanwhile, FA pre-activation also gave rise to more crystallized semiconductor ZnO phase especially calcination in N-2 at a high temperature. Therefore, the obtained CZAZ catalysts with FA pre-activation on precursor exhibited better catalytic performance in CO2 hydrogenation due to the synergistic effect of Cu-0 particles and crystallized semiconductor ZnO phase. (C) 2019 Elsevier Inc. All rights reserved.
