Solvent Effects on the Low-Temperature NH3-SCR Activity and Hydrothermal Stability of WO3/SiO2@CeZrOx Catalyst

被引:22
作者
Liu, Shuang [1 ]
Liu, Jingying [2 ]
Lin, Qingjin [3 ]
Xu, Shuhao [2 ]
Wang, Jianli [2 ,4 ]
Xu, Haidi [1 ,4 ]
Chen, Yaoqiang [1 ,2 ,4 ]
机构
[1] Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610207, Sichuan, Peoples R China
[2] Sichuan Univ, Coll Chem, Sichuan Prov Environm Protect Environm Catalyt Ma, Chengdu 610064, Sichuan, Peoples R China
[3] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610064, Sichuan, Peoples R China
[4] Sichuan Univ FGD Flue Gas Desulfurizat, State Engn Res Ctr, Chengdu 610064, Sichuan, Peoples R China
基金
中国国家自然科学基金;
关键词
NH3-SCR; Solvent optimization; Dispersion of SiO2; Low-temperature activity; Hydrothermal stability; CERIA-ZIRCONIA NANOCOMPOSITES; WO3/CE0.68ZR0.32O2; CATALYST; OXIDE CATALYST; REDUCTION; NOX; SURFACE; NH3; SCR; PATHWAY; WO3;
D O I
10.1021/acssuschemeng.0c04243
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Low-temperature NH3-SCR activity and high-temperature hydrothermal stability have always been recognized as two great challenges in the current developments of candidate NH3-SCR catalysts for practical applications. Herein, we present an optimizing solvent effects strategy to fabricate a WO3/SiO2@CeZrOx catalyst with highly dispersed SiO2 (W/Si@CeZr-m, prepared with the mixed solvent of deionized water and n-hexane). Compared with WO3/SiO2@CeZrOx catalysts prepared with single deionized water (W/Si@CeZr-w) and n-hexane (W/Si@CeZr-h), W/Si@CeZr-m not only shows highly effective NH3-SCR activity, especially at low temperatures (the complete conversion temperature being lowered 40 degrees C) but also exhibits a long lifetime (compares well with 84 000 miles). Optimizing solvent in the synthesis process of catalysts can enhance the electronic interaction of Si, W, and Ce, thus improving the amount of active sites and redox property of the catalysts. Moreover, the highly dispersed SiO2 can strengthen structural stability of W/Si@CeZr-m catalyst to resist hydrothermally aged. This work provides a simple route to prepare a highly effective candidate NH3-SCR catalyst for future applications in eliminating diesel engine exhausts.
引用
收藏
页码:13418 / 13429
页数:12
相关论文
共 45 条
[21]   Facet-Activity Relationship of TiO2 in Fe2O3/TiO2 Nanocatalysts for Selective Catalytic Reduction of NO with NH3: In Situ DRIFTs and DFT Studies [J].
Liu, Jie ;
Meeprasert, Jittima ;
Namuangruk, Supawadee ;
Zha, Kaiwen ;
Li, Hongrui ;
Huang, Lei ;
Maitarad, Phornphimon ;
Shi, Liyi ;
Zhang, Dengsong .
JOURNAL OF PHYSICAL CHEMISTRY C, 2017, 121 (09) :4970-4979
[22]   Mechanistic investigation of the enhanced NH3-SCR on cobalt-decorated Ce-Ti mixed oxide: In situ FTIR analysis for structure-activity correlation [J].
Liu, Jie ;
Li, Xinyong ;
Zhao, Qidong ;
Ke, Jun ;
Xiao, Huining ;
Lv, Xiaojuan ;
Liu, Shaomin ;
Tade, Moses ;
Wang, Shaobin .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2017, 200 :297-308
[23]   Promotional effect of H2O2 modification on the cerium-tungsten-titanium mixed oxide catalyst for selective catalytic reduction of NO with NH3 [J].
Liu, Jing ;
Xiong, Zhi-bo ;
Zhou, Fei ;
Lu, Wei ;
Jin, Jing ;
Ding, Shi-fa .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2018, 121 :360-366
[24]   Hydrothermal Stability of CeO2-WO3-ZrO2 Mixed Oxides for Selective Catalytic Reduction of NOx by NH3 [J].
Liu, Jingjing ;
Shi, Xiaoyan ;
Shan, Yulong ;
Yan, Zidi ;
Shan, Wenpo ;
Yu, Yunbo ;
He, Hong .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2018, 52 (20) :11769-11777
[25]   Quantitative study of the NH3-SCR pathway and the active site distribution over CeWOx at low temperatures [J].
Liu, Kuo ;
He, Hong ;
Yu, Yunbo ;
Yan, Zidi ;
Yang, Weiwei ;
Shan, Wenpo .
JOURNAL OF CATALYSIS, 2019, 369 :372-381
[26]   Morphology-Oriented ZrO2-Supported Vanadium Oxide for the NH3-SCR Process: Importance of Structural and Textural Properties [J].
Liu, Shanshan ;
Wang, Hao ;
Wei, Ying ;
Zhang, Runduo ;
Royer, Sebastien .
ACS APPLIED MATERIALS & INTERFACES, 2019, 11 (25) :22240-22254
[27]   Enhancement of the Hydrothermal Stability of WO3/Ce0.68Zr0.32O2 Catalyst by Silica Modification for NH3-SCR [J].
Liu, Shuang ;
Lin, Qjngjin ;
Liu, Jingying ;
Xu, Shuhao ;
Wang, Yun ;
Xu, Haidi ;
Wang, Jianli ;
Chen, Yaoqiang .
ACS APPLIED ENERGY MATERIALS, 2020, 3 (01) :1161-+
[28]   Investigation of the selective catalytic reduction of NO with NH3 over the WO3/Ce0.68Zr0.32O2 catalyst: the role of H2O in SO2 inhibition [J].
Liu, Shuang ;
Feng, Xi ;
Liu, Jingying ;
Lin, Qingjin ;
Xiong, Lei ;
Wang, Yun ;
Xu, Haidi ;
Wang, Jianli ;
Chen, Yaoqiang .
NEW JOURNAL OF CHEMISTRY, 2019, 43 (05) :2258-2268
[29]   Ce-Sn binary oxide catalyst for the selective catalytic reduction of NOx by NH3 [J].
Liu, Zhiming ;
Feng, Xu ;
Zhou, Zizheng ;
Feng, Yongjun ;
Li, Junhua .
APPLIED SURFACE SCIENCE, 2018, 428 :526-533
[30]   Shape dependence and sulfate promotion of CeO2 for selective catalytic reduction of NOx with NH3 [J].
Ma, Lei ;
Seo, Chang Yup ;
Nahata, Mohit ;
Chen, Xiaoyin ;
Li, Junhua ;
Schwank, Johannes W. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2018, 232 :246-259