Nature of SO3 poisoning on Cu/SAPO-34 SCR catalysts
Nature of SO3 poisoning on Cu/SAPO-34 SCR catalysts
复制标题
Cu/SAPO-34 SCR 催化剂 SO3 中毒的性质
DOI:
10.1016/j.jcat.2017.12.008
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发表时间:
2018-02
影响因子:
7.3
通讯作者:
Wang Jun
中科院分区:
文献类型:
--
作者:
Shen Meiqing;Zhang Yun;Wang Jianqiang;Wang Chen;Wang Jun
To reveal the nature of SO3poisoning of Cu/SAPO-34 selective catalytic reduction (SCR) catalysts, CHA structure, copper species, and NOxconversion were probed. The Cu/SAPO-34 catalyst was treated with different ratios of SO3to SOx(0, 6, 13, and 20%) at 250 °C. The breakage of Sisingle bondO(H)single bondAl bonds takes place and leads to aluminum sulfate formation upon SOxsulfation. More isolated Cu2+transform to copper sulfate with an increment of the SO3/SOxratio. Catalysts poisoned with SOxshow lower NOxconversion at 150–300 °C, the reason for which is a reduced number of isolated Cu2+sites, as their turnover frequencies (TOFs) are identical. The loss of isolated Cu2+and Sisingle bondO(H)single bondAl bonds is responsible for the inferior activity above 300 °C. The presence of SO3cannot be ignored because of the irreversible reaction with Cu/SAPO-34 when diesel oxidation catalysts are applied upstream of the SCR.
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影响因子:
4.2
作者:
B. Kartheuser;B. K. Hodnett;A. Riva;G. Centi;H. Matralis;M. Ruwet;P. Grange;N. Passarini
通讯作者:
B. Kartheuser;B. K. Hodnett;A. Riva;G. Centi;H. Matralis;M. Ruwet;P. Grange;N. Passarini
影响因子:
5.3
作者:
Cheng, Yisun;Lambert, Christine;Peden, Charles H. F.
通讯作者:
Peden, Charles H. F.
DOI:
10.1021/j100589a009
发表时间:
1975
期刊:
The Journal of Physical Chemistry
影响因子:
--
作者:
R. Herman;J. Lunsford;H. Beyer;P. Jacobs;J. Uytterhoeven
通讯作者:
R. Herman;J. Lunsford;H. Beyer;P. Jacobs;J. Uytterhoeven
影响因子:
--
作者:
BRIEND, M;VOMSCHEID, R;BARTHOMEUF, D
通讯作者:
BARTHOMEUF, D
影响因子:
7.3
作者:
Lei Wang;Wei Li;S. J. Schmieg;D. Weng
通讯作者:
Lei Wang;Wei Li;S. J. Schmieg;D. Weng