In/H-Beta modified by Co3O4 and its superior performance in the presence of H2O and SO2 for selective catalytic reduction of NOx with CH4

被引:15
作者
Zhao, Jiuhu [1 ,2 ]
Wen, Zhengzhong [1 ,2 ]
Zhu, Rongshu [1 ,2 ]
Li, Zhi [1 ,2 ]
Ding, Ran [1 ,2 ]
Zhu, Yongji [1 ,2 ]
Gu, Tingkun [1 ,2 ]
Yang, Rong [1 ,2 ]
Zhu, Zhenye [1 ,2 ]
机构
[1] Harbin Inst Technol Shenzhen, Environm Sci & Engn Res Ctr, Shenzhen Key Lab Organ Pollut Prevent & Control, Shenzhen 518055, Peoples R China
[2] Harbin Inst Technol Shenzhen, Int Joint Res Ctr Persistent Tox Subst, Shenzhen 518055, Peoples R China
来源
CHEMICAL ENGINEERING JOURNAL ADVANCES | 2020年 / 3卷
关键词
CH4-SCR; Synthesis conditions; H2O resistance; SO2; resistance; IR-BASED CATALYSTS; SIMULTANEOUS REMOVAL; HYDROGEN-PRODUCTION; METHANE; MECHANISM; OXYGEN; KINETICS; SITES; FTIR; SOOT;
D O I
10.1016/j.ceja.2020.100029
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this paper, In-metal oxide/H-Beta catalysts were synthesized by ion exchange method and In-Co 3 O 4 /H-Beta exhibited the highest catalytic activity for the selective catalytic reduction of NO x with CH 4 in presence of H 2 O and SO 2 . Thus, the synthesis conditions of In-Co 3 O 4 /H-Beta were optimized. The results showed that In-Co 3 O 4 /HBeta exhibited excellent catalytic performance and high CH 4 selectively when the synthesis was carried out by ion exchange method, the ratio of Si and Al in H-Beta was 25, the ratio of Co 3 O 4 and H-Beta was 5:40, the concentration of ion exchange liquid was 0.033 M and calcination temperature was 500 degrees C. The NO x removal efficiency was about 87.6 % and N 2 selectivity could reach 96.3% in the presence of H 2 O and SO 2 . Through a series of characterizations, it was concluded that In-Co 3 O 4 /H-Beta owned stable catalyst structure, abundant Bronsted acid sites and the highest ratio of InO + /In 2 O 3 under the optimal synthesis conditions. In addition, the doped of Co 3 O 4 could inhibit the adsorption of sulfate species on the surface of In/H-Beta catalyst, leading to the excellent H 2 O and SO 2 resistance property.
引用
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页数:10
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