%0 Journal Article
%A Tao Meng
%A Nan Ren
%A Zhen Ma
%T Effect of copper precursors on the catalytic performance of Cu-ZSM-5 catalysts in N2O decomposition
%D 2018
%R 10.1016/j.cjche.2018.02.015
%J Chinese Journal of Chemical Engineering
%P 1051-1058
%V 26
%N 5
%X Five Cu-ZSM-5 catalysts were obtained by treating Na-ZSM-5 (Si/Al ratio=15) with aqueous solutions of different Cu precursors (CuCl2, Cu(NO3)2, CuSO4, Cu(CH3COO)2, and ammoniacal copper (Ⅱ) complex ion). After being pretreated in flowing He at 500℃ to form active Cu+, these catalysts exhibited quite different activities in catalytic decomposition of N2O. CZM-AC(Ⅱ) (prepared by ammoniacal copper (Ⅱ) complex ion) with 9.4 wt% Cu content was the most active among these Cu-ZSM-5 catalysts, achieving almost complete N2O conversion at 400℃. CZM-CA (prepared using Cu(CH3COO)2 as the Cu precursor) with 2.8 wt% Cu content was the second most active catalyst among these Cu-ZSM-5 catalysts, achieving almost complete N2O conversion at 425℃. CZM-CC, CZMCN, and CZM-CS prepared by using CuCl2, Cu(NO3)2, or CuSO4 as the Cu precursor with similar Cu contents (≈1.7 wt%) were the least active among these Cu-ZSM-5 catalysts, achieving ca. 90% N2O conversion at 500℃. XRD, ICP, SEM, TEM, EDX-mapping, and CO-IR experiments were conducted to characterize relevant samples. The superior activity of CZM-AC(Ⅱ) can be attributed to the high contents of total Cu+ and dimeric Cu+ among these samples. The influence of co-fed O2 or H2O on the catalytic performance of typical samples was also studied.
%U https://cjche.cip.com.cn/EN/10.1016/j.cjche.2018.02.015