Enhancing hydrothermal stability of NH3-SCR reaction over Cu-SSZ-52 catalyst by increasing Si/Al ratio

被引：0

作者：

Jiang, Xiangqiong ^{[1
]}

Zeng, Zhifeng ^{[1
]}

Chen, Dongdong ^{[5
]}

Yao, Yuyan ^{[1
]}

Zhang, Yang ^{[1
]}

Wang, Shuangjia ^{[1
]}

Li, Rui ^{[2
]}

Jiang, Jiuxing ^{[1
,3
,4
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem, MOE Key Lab Bioinorgan & Synthet Chem, IGCME, Guangzhou 510006, Peoples R China

[2] SINOPEC Shanghai Res Inst Petrochem Technol CO LTD, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 201208, Peoples R China

[3] Gannan Normal Univ, Sch Geog & Environm Engn, Jiangxi Prov Key Lab Low Carbon Solid Waste Recycl, Ganzhou 341000, Peoples R China

[4] XinHuaYue Grp, China Guangdong Prov Key Lab Opt Chem, Maoming 525000, Peoples R China

[5] Zhaoqing Univ, Sch Environm & Chem Engn, Guangdong Prov Key Lab Environm Hlth & Land Resour, Zhaoqing 526061, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 502卷

基金：

中国国家自然科学基金;

关键词：

SSZ-52; Hydrothermal stability; Si/Al ratio; NH3-SCR; DeNOx; SILICA LTA ZEOLITES; SITU-DRIFTS; NOX; REDUCTION; MECHANISM; SCR; DEACTIVATION; PHOSPHORUS; PRECURSORS; KINETICS;

D O I：

10.1016/j.cej.2024.157750

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Cu-SSZ-52 zeolites, celebrated for their exceptional low-temperature NH3-SCR activity, are hampered by poor hydrothermal stability attributable to a low Si/Al ratio, which significantly constrains their practical utility. In this work, we successfully synthesized Cu-SSZ-52 catalysts with a Si/Al ratio as high as 7 for the first time. iDPCSTEM and PXRD analysis confirmed that the catalysts have the same structure as SSZ-52. Notably, the Cu-SSZ-527 catalyst showcased enhanced deNOx performance both prior to and following hydrothermal aging, outperforming Cu-SSZ-52 catalysts with a Si/Al ratio of 4 and Cu-SSZ-13 catalysts with a Si/Al ratio of 7. Our findings underscore that a continuous increase in the Si/Al ratio resulted in the promotion of deNOx activity and hydrothermal stability of Cu-SSZ-52 catalysts.

引用

页数：13

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