Ash- and Alkali-Poisoning Mechanisms for Commercial Vanadium-Titanic-Based Catalysts

被引：13

作者：

Guo, Yangyang ^{[1
,3
]}

Luo, Lei ^{[1
]}

Mu, Bailong ^{[1
]}

Wang, Jian ^{[1
]}

Zhu, Tingyu ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Fujian, Peoples R China

[3] Tsinghua Univ, Natl Engn Lab Flue Gas Pollutants Control Technol, Beijing 100084, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2019年 / 58卷 / 49期

基金：

美国国家科学基金会;

关键词：

SCR CATALYSTS; V2O5-WO3/TIO2; CATALYST; NITRIC-OXIDE; REDUCTION; DEACTIVATION; RESISTANCE; NH3-SCR; SO2; NOX; NH3;

D O I：

10.1021/acs.iecr.9b04454

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Two commercial catalysts at different temperatures were selected, with cement kiln ash physically loaded on them, to investigate the ash- and alkali-poisoning effect on selective catalytic reduction (SCR) catalysts. Ash loading on catalysts obviously decreased the amount of NO conversion. H2O vapor increased the ash-poisoning effect on catalysts, whereas SO2 addition apparently decreased the ash-poisoning effect because the NO conversion gradually returned to the same activity level as that for the catalysts without ash loading. In situ Diffuse Reflection Infrared Fourier Transform spectroscopy (DRIFT) was adopted to clarify this phenomenon. It was found that new Lewis acid sites and Bronsted acid sites had formed on the catalyst surface after SO2 treatment, and the new Bronsted acid sites enhanced the formation of NH4+. Moreover, the decomposition behavior of NH4HSO4 on the catalyst surface formed from HSO4- enhanced the NO conversion performance because of the reactions of NH4+ or NH3 from NH4HSO4 with gaseous NO.

引用

页码：22418 / 22426

页数：9

共 35 条

[1] Deactivation and Characterization of SCR Catalysts Used in Municipal Waste Incineration Applications [J].

Brandin, Jan G. M. ;

Odenbrand, C. U. Ingemar .

CATALYSIS LETTERS, 2018, 148 (01) :312-327

[2] Improving the denitration performance and K-poisoning resistance of the V2O5-WO3/TiO2 catalyst by CO4+ and Zr4+ co-doping [J].

Cao, Jun ;

Yao, Xiaojiang ;

Yang, Fumo ;

Chen, Li ;

Fu, Min ;

Tang, Changjin ;

Dong, Lin .

CHINESE JOURNAL OF CATALYSIS, 2019, 40 (01) :95-104

[3] The effects of tungsten and hydrothermal aging in promoting NH3-SCR activity on V2O5/WO3-TiO2 catalysts [J].

Chen, Hongfeng ;

Xia, Yang ;

Fang, Ruyi ;

Huang, Hui ;

Gan, Yongping ;

Liang, Chu ;

Zhang, Jun ;

Zhang, Wenkui ;

Liu, Xuesong .

APPLIED SURFACE SCIENCE, 2018, 459 :639-646

[4] ROLE OF WO3 IN MIXED V2O5-WO3/TIO2 CATALYSTS FOR SELECTIVE CATALYTIC REDUCTION OF NITRIC-OXIDE WITH AMMONIA [J].

CHEN, JP ;

YANG, RT .

APPLIED CATALYSIS A-GENERAL, 1992, 80 (01) :135-148

[5] 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

[6] The poisoning effect of alkali metals doping over nano V2O5-WO3/TiO2 catalysts on selective catalytic reduction of NOx by NH3 [J].

Chen, Liang ;

Li, Junhua ;

Ge, Maofa .

CHEMICAL ENGINEERING JOURNAL, 2011, 170 (2-3) :531-537

[7]

Chourasia A. R., 1992, Surf. Sci. Spectra, V1, P233, DOI [10.1116/1.1247644, DOI 10.1116/1.1247644]

[8] Combined poisoning effect of K+ and its counter-ion (Cl- or NO3-) on MnOx/TiO2 catalyst during the low temperature NH3-SCR of NO [J].

Cimino, Stefano ;

Totarella, Giorgio ;

Tortorelli, Miriam ;

Lisi, Luciana .

CHEMICAL ENGINEERING JOURNAL, 2017, 330 :92-101

[9] Rationally Designed Porous MnOx-FeOx Nanoneedles for Low-Temperature Selective Catalytic Reduction of NOx by NH3 [J].

Fan, Zhaoyang ;

Shi, Jian-Wen ;

Gao, Chen ;

Gao, Ge ;

Wang, Baorui ;

Niu, Chunming .

ACS APPLIED MATERIALS & INTERFACES, 2017, 9 (19) :16117-16127

[10] Mechanism study on the adsorption and reactions of NH3, NO, and O2 on the CaO surface in the SNCR deNOx process [J].

Fu, Shi-long ;

Song, Qiang ;

Yao, Qiang .

CHEMICAL ENGINEERING JOURNAL, 2016, 285 :137-143

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