Promoting the selective catalytic oxidation of diethylamine over MnOx/ZSM-5 by surface acid centers
Promoting the selective catalytic oxidation of diethylamine over MnOx/ZSM-5 by surface acid centers
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表面酸中心促进二乙胺在MnOx/ZSM-5上的选择性催化氧化
DOI:
10.1016/j.apsusc.2020.146348
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发表时间:
2020-08
影响因子:
6.7
通讯作者:
Luo Mengfei
中科院分区:
文献类型:
--
作者:
Lu Ying;Hu Caihong;Zhang Wenxia;Jin Zhunian;Leng Xingyue;Wang Yuejuan;Chen Jian;Luo Mengfei
Herein, we demonstrated the selective catalytic oxidation of diethylamine to N-2 over MnOx/ZSM-5 catalysts. It was found that oxidation activity of diethylamine over MnOx/ZSM-5 catalysts increased when the loading of Mn increased, but the N-2 selectivity decreased at 420 degrees C obviously. MnO x /ZSM-5(360) catalysts showed higher oxidation activity of diethylamine than MnOx/ZSM-5(18) catalysts with equivalent Mn loading, which was as- cribed to the presence of MnO x species easily reduced and enriched on ZSM-5(360) support surface. However, MnOx/ZSM-5(18) catalysts containing moderate and strong surface acid centers in addition to the weak acid centers gave signi ficantly higher N-2 selectivity than MnOx/ZSM-5(360) catalysts possessing only weak surface acid centers. 20MnO(x)/ZSM-5(18) catalyst had relatively high oxidation activity of diethylamine and N-2 se- lectivity, of which the lowest reaction temperature for diethylamine conversion at 98% (T 98 ) is 240 degrees C and the N-2 selectivity is exceeding 95.5% at 420 degrees C. Furthermore, 20MnO(x)/ZSM-5(18) catalyst showed wider temperature window (Delta T = 180 degrees C) with N-2 selectivity over 95% than 20MnO(x)/ZSM-5(360) catalyst (Delta T = 80 degrees C). It can be concluded that the easily reduced and surface enriched MnOx species are favorable for the oxidation of die- thylamine, the moderate and strong surface acid centers are bene ficial to activation of diethylamine and the generation of N-2 .
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影响因子:
5.3
作者:
L. Andersson;J. Brandin;C. Odenbrand
通讯作者:
L. Andersson;J. Brandin;C. Odenbrand
影响因子:
3.9
作者:
Chen, Lang;Xie, Jun;Au, Chak-Tong;Yin, Shuang-Feng
通讯作者:
Yin, Shuang-Feng
影响因子:
5.3
作者:
Xing Xin;Li Na;Sun Yonggang;Wang Gang;Cheng Jie;Hao Zhengping
通讯作者:
Hao Zhengping
影响因子:
4.2
作者:
Xing Xin;Li Na;Cheng Jie;Sun Yonggang;Wang Gang;Zhang Zhongshen;Xu Hao;He Chi;Hao Zhengping
通讯作者:
Hao Zhengping
DOI:
10.1080/10473289.1991.10466828
发表时间:
1991-04
影响因子:
2.7
作者:
D. R. van der Vaart;W. M. Vatvuk;A. H. Wehe
通讯作者:
D. R. van der Vaart;W. M. Vatvuk;A. H. Wehe