Enhancement of low-temperature NH3-SCR catalytic activity and H2O & SO2 resistance over commercial V2O5-MoO3/TiO2 catalyst by high shear-induced doping of expanded graphite

被引：57
作者：
Wu, Rui [1 ,2 ]
Li, Lingcong [1 ,2 ]
Zhang, Ningqiang [1 ,2 ,3 ]
He, Junda [1 ,2 ]
Song, Liyun [1 ,2 ]
Zhang, Guizhen [1 ,2 ]
Zhang, Zhaoliang [4 ]
He, Hong [1 ,2 ,5 ]
机构：
[1] Beijing Univ Technol, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China
[2] Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China
[3] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
[4] Jinan Univ, Sch Chem & Chem Engn, Shandong Prov Key Lab Fluorine Chem & Chem Mat, Jinan 250022, Peoples R China
[5] Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, Peoples R China
来源：
CATALYSIS TODAY | 2021年 / 376卷
基金：
国家重点研发计划;
关键词：
NH3-SCR; V2O5-MoO3/TiO2; Expanded graphite; High shear method; NITRIC-OXIDE; SCR ACTIVITY; V2O5/TIO2; CATALYSTS; REDUCTION; NO; NH3; PERFORMANCE; MECHANISM; AMMONIA; STABILITY;
D O I：
10.1016/j.cattod.2020.04.051
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In this paper, the preparation of V2O5-MoO3/TiO2-expanded graphite (EG) by different methods was investigated to enhance the H2O resistance in SCR reaction. The catalyst with doping of EG by high shear method showed the best SCR performance. BET, TEM, XPS, H-2-TPR, NH3-TPD and FT-IR were used to analyze the physicochemical characteristics of the prepared catalysts. The results indicated that TiO2 particles were distributed uniformly with EG by high shear method, which enhanced the surface area, increased Bronsted and Lewis acid sites and raised the VO2+ and adsorbed oxygen species on the surface. It was found that even with the addition of H2O (20 %) and SO2 at low temperature, the catalyst doping of EG by high shear method maintained about 90 % NO conversion. In addition, in-situ DRIFT spectra results showed that the NH3-SCR reaction over Cat-1 and Cat-2 followed the E-R and L-H mechanism, and the NH3 and NOx adsorbed species on the surface of Cat-2 possessed higher activity in SCR reaction than Cat-1.
引用
收藏
页码：302 / 310
页数：9
相关论文
共 70 条
[1]   Neutron beam interaction with rutile TiO2 single crystal (111): Raman and XPS study on Ti3+-oxygen vacancy formation [J].
Abdullah, Siti Ashraf ;
Sandan, Mohd Zainizan ;
Nayan, Nafarizal ;
Embong, Zaidi ;
Hak, Cik Rohaida Che ;
Adriyanto, Feri .
MATERIALS LETTERS, 2020, 263
[2]   High moisture food extrusion [J].
Akdogan, H .
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, 1999, 34 (03) :195-207
[3]   The effect of metal oxide additives on the activity of V2O5/TiO2 catalysts for the selective catalytic reduction of nitric oxide by ammonia [J].
Amiridis, MD ;
Duevel, RV ;
Wachs, IE .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1999, 20 (02) :111-122
[4]   Low-temperature catalytic reduction of NO by NH3 over vanadia-based nanoparticles prepared by flame-assisted spray pyrolysis: Influence of various supports [J].
Boningari, Thirupathi ;
Koirala, Rajesh ;
Smirniotis, Panagiotis G. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2013, 140 :289-298
[5]   Effect of Sn on MnOx-CeO2 catalyst for SCR of NOx by ammonia: Enhancement of activity and remarkable resistance to SO2 [J].
Chang, Huazhen ;
Li, Junhua ;
Chen, Xiaoyin ;
Ma, Lei ;
Yang, Shijian ;
Schwank, Johannes W. ;
Hao, Jiming .
CATALYSIS COMMUNICATIONS, 2012, 27 :54-57
[6]   DRIFT Study on Cerium-Tungsten/Titiania Catalyst for Selective Catalytic Reduction of NOx with NH3 [J].
Chen, Liang ;
Li, Junhua ;
Ge, Maofa .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2010, 44 (24) :9590-9596
[7]   Effect of promoters includingWO3 and BaO on the activity and durability of V2O5/sulfated TiO2 catalyst for NO reduction by NH3 [J].
Choo, ST ;
Yim, SD ;
Nam, IS ;
Ham, SW ;
Lee, JB .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 44 (03) :237-252
[8]   Effect of Ce/Y Addition on Low-Temperature SCR Activity and SO2 and H2O Resistance of MnOx/ZrO2/MWCNTs Catalysts [J].
Dong, Lifu ;
Fan, Yinming ;
Ling, Wei ;
Yang, Chao ;
Huang, Bichun .
CATALYSTS, 2017, 7 (06)
[9]   Investigation of the selective catalytic reduction of nitric oxide with ammonia over Mn/TiO2 catalysts through transient isotopic labeling and in situ FT-IR studies [J].
Ettireddy, Padmanabha Reddy ;
Ettireddy, Neeraja ;
Boningari, Thirupathi ;
Pardemann, Robert ;
Smirniotis, Panagiotis G. .
JOURNAL OF CATALYSIS, 2012, 292 :53-63
[10]   Low-temperature selective catalytic reduction of NO with NH3 over nanoflaky MnOx on carbon nanotubes in situ prepared via a chemical bath deposition route [J].
Fang, Cheng ;
Zhang, Dengsong ;
Cai, Sixiang ;
Zhang, Lei ;
Huang, Lei ;
Li, Hongrui ;
Maitarad, Phornphimon ;
Shi, Liyi ;
Gao, Ruihua ;
Zhang, Jianping .
NANOSCALE, 2013, 5 (19) :9199-9207
1234567