TiO2-Supported Catalysts in Low-Temperature Selective Reduction of NOx with NH3: A Review of Recent Progress

被引:0
作者
Bian, Xue [1 ,2 ]
Wang, Jing [1 ,2 ]
Bai, Yuting [3 ]
Li, Yanping [1 ,2 ]
Wu, Wenyuan [1 ,2 ]
Yang, Yuming [1 ,2 ]
机构
[1] Minist Educ, Key Lab Ecol Met Multimet Intergrown Ores, Shenyang 110819, Peoples R China
[2] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
[3] Liaoning Inst Sci & Technol, Sch Met & Mat Engn, Benxi 117004, Peoples R China
关键词
NOx; TiO2; support of catalyst; NH3-SCR catalyst; catalytic mechanism; V2O5/TIO2; CATALYSTS; MNOX/TIO2; CATALYST; OXIDE CATALYSTS; 001; FACETS; SCR; ANATASE; MN; TIO2; SO2; PERFORMANCE;
D O I
10.3390/catal14090558
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Selective catalytic reduction (SCR) stands out as a pivotal method for curbing NOx emissions from flue gas. The support, crucially, for SCR efficacy, loads and interacts with the active components within the catalyst. The catalysts could be amplified by the denitration performance of the catalyst by enhancements in support pore structure, acidity, and mechanical robustness. These improvements ensure efficient interaction between the support and active materials, thereby optimizing the structure and property of the catalysts. TiO2 is the most commonly used support of the NH3-SCR catalyst. The catalyst with TiO2 support has poor thermal stability and a narrow temperature range, which can be improved. This paper reviews the research progress on the effects of various aspects of TiO2 support on the NH3-SCR catalyst's performance, focusing on the TiO2 crystal type, TiO2 crystal surface, different TiO2 structures, TiO2 support preparation methods, and the effects of TiO2-X composite support on the NH3-SCR catalyst's performance. The reaction mechanism, denitrification performance, and anti-SO2/H2O poisoning performance and mechanism of TiO2 support with different characteristics were described. At the same time, the development trend of the NH3-SCR catalyst using TiO2 as the support is prospected. It is hoped that this work can provide optimization ideas for SCR catalyst research.
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页数:13
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