Effect of alkali metal deposition on Mn-Ce/TiO<sub>2</sub> catalyst for NO reduction by NH<sub>3</sub> at low temperature

YAN Dong-jie; LI Ya-jing; YU Ya; HUANG Xue-min; ZHOU Wei-ke; LIU Ying-hui

Volume 46 Issue 12

Dec. 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(12): 1513-1519

YAN Dong-jie, LI Ya-jing, YU Ya, HUANG Xue-min, ZHOU Wei-ke, LIU Ying-hui. Effect of alkali metal deposition on Mn-Ce/TiO2 catalyst for NO reduction by NH3 at low temperature[J]. Journal of Fuel Chemistry and Technology, 2018, 46(12): 1513-1519.

Citation:

YAN Dong-jie, LI Ya-jing, YU Ya, HUANG Xue-min, ZHOU Wei-ke, LIU Ying-hui. Effect of alkali metal deposition on Mn-Ce/TiO₂ catalyst for NO reduction by NH₃ at low temperature[J]. Journal of Fuel Chemistry and Technology, 2018, 46(12): 1513-1519.

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Effect of alkali metal deposition on Mn-Ce/TiO₂ catalyst for NO reduction by NH₃ at low temperature

Shaanxi Key Laboratory of Environmental Engineering, College of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

Funds:

the Natural Science Foundation of Shaanxi Province 2016JQ5095

Scientific Research Plan Projects of Educational Department of ShaanXi Province 17JK0465

More Information

Corresponding author: YAN Dong-jie, E-mail: yandongjie_2000@163.com
Received Date: 2018-06-15
Rev Recd Date: 2018-09-04

Available Online: 2021-01-23

Publish Date: 2018-12-10

Abstract

Abstract

A manganese and cerium oxide catalyst was prepared through sol-gel method. Effects of the concentration and type of alkali metals on performance of the Mn-Ce/TiO₂ catalysts were investigated in selective catalytic reduction of NO with NH₃. The cause of the alkali metal poisoning of the catalyst was studied and the influence of sodium salt deposition on the activity retention fraction under different reaction conditions was further studied. The catalysts were characterized by scanning electron microscope (SEM), BET surface area, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), respectively. The results show that alkali metals exhibited an inhibiting effect on the selective catalytic reduction (SCR), and the deactivation rate of Mn-Ce/TiO₂ catalyst caused by potassium poisoning was higher than that by sodium poisoning. The NO conversion was decreased from 91.2% to 62.0% at a temperature of 160℃, when the potassium content was 2%. This is mainly because the presence of the alkali metal resulted in a reduction of the specific surface area of the catalyst, and the specific surface area of the potassium poisoning of the catalyst was reduced by 34.2%. The alkali metal poisoning could cause blockage of the micropores on the surface and the transfer from anatase to rutile phase of the catalyst. The effect of alkali metal on the retention fraction of the Mn-Ce/TiO₂ catalyst indicates that the particle size of the catalyst had slight effect on its activity retention fraction. The selective catalytic reduction (SCR) activity of the Mn-Ce/TiO₂ catalyst increased along with the temperature. While the content of alkali metal decreased, the retention rate of active metal increased. The inhibitory effect of Na₂SO₄ and NaCl on the denitrification activity of Mn-Ce/TiO₂ catalyst was more significant than that of NaNO₃.
- low temperature SCR,
- Mn-Ce/TiO₂,
- alkali metal poisoning,
- activity retention fraction

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References(21)

References

[1]	郝吉明, 马广大, 王书肖.大气污染控制工程(第三版)[M].北京:高等教育出版社. 2010:378. HAO Ji-ming, MA Guang-da, WANG Shu-xiao. Air Pollution Control Engineering(Third Edition)[M]. Beijing:Higher Education Press, 2010:378.
[2]	DU X S, YANG G P, CHEN Y R, RAN JY, ZHANG L. The different poisoning behaviors of various alkali metal containing compounds on SCR catalyst[J]. Appl Surf Sci, 2017, 392:162-168. doi: 10.1016/j.apsusc.2016.09.036
[3]	CIMINO S, LISI L, TORTORLLI M. Low temperature SCR on supported MnO_x catalysts for marine exhaust gas cleaning:Effect of KCl poisoning[J]. Chem Eng J, 2016, 283:223-230. doi: 10.1016/j.cej.2015.07.033
[4]	陈巳樊.碱金属对钒钛催化剂脱硝行为的影响[D].北京: 北京化工大学, 2013. http://cdmd.cnki.com.cn/Article/CDMD-10010-1013267106.htm CHEN Yi-fan. Effects of alkali metals on the denitration behavior of vanadium-titanium catalysts[D]. Beijing: Beijing University of Chemical Technology, 2013. http://cdmd.cnki.com.cn/Article/CDMD-10010-1013267106.htm
[5]	韩斌.碱金属对催化剂脱硝活性的影响及其本征动力学研究[D].北京: 北京化工大学, 2013. http://cdmd.cnki.com.cn/Article/CDMD-10010-1013267157.htm HAN Bin. Effects of alkali metals on denitrification activity of catalysts and their intrinsic kinetics[D]. Beijing: Beijing University of Chemical Technology, 2013. http://cdmd.cnki.com.cn/Article/CDMD-10010-1013267157.htm
[6]	KLING A, ANDERSSON C, MYRINGER A, ESKILSSON D, JÄRÃS S G. Alkali deactivation of high-dust SCR catalysts used for NO_x reduction exposed to flue gas from 100 MW-scale biofuel and peat fired boilers:Influence of flue gas composition[J]. Appl Catal B:Environ, 2007, 69(3/4):240-251. http://www.sciencedirect.com/science/article/pii/S0926337306001044
[7]	ZHENG Y J, JENSEN A D, JOHNSSON J E. Deactivation of V₂O₅-WO₃-TiO₂ SCR catalyst at a biomass-fired combined heat and power plant[J]. Appl Catal B:Environ, 2005, 60(3/4):253-264.
[8]	JIANG Y, ZHANG Y X, WU W H, GAO X. Kinetic study on potassium poisoning of V₂O₅/TiO₂ catalysts for selective catalytic reduction of NO in flue gas[J]. Proc CSEE, 2014, 34(23):3899-3906. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgdjgcxb201423010
[9]	CHEN J P, YANG R T. Mechanism of poisoning of the V₂O₅/TiO₂ catalyst for the reduction of NO by NH₃[J]. J Catal, 1990, 125(2):411-420. doi: 10.1016/0021-9517(90)90314-A
[10]	沈伯雄, 熊丽仙, 刘亭, 王静, 田晓娟.纳米负载型V₂O₅-WO₃/TiO₂催化剂碱中毒及再生研究[J].燃料化学学报, 2010, 38(1):85-91. doi: 10.3969/j.issn.0253-2409.2010.01.016 SHEN Bo-xiong, XIONG Li-xian, LIU Ting, WANG Jing, TIAN Xiao-juan. Alkali deactivation and regeneration of nano V₂O₅-WO₃/TiO₂ catalysts[J]. J Fuel Chem Technol, 2010, 38(1):85-91. doi: 10.3969/j.issn.0253-2409.2010.01.016
[11]	王舜.活性炭负载二氧化钛催化剂的制备及光电催化性能的研究[D].南京: 南京航空航天大学, 2012. http://cdmd.cnki.com.cn/Article/CDMD-10287-1014006049.htm WANG Shun. Preparation and photoelectrocatalytic performance of activated carbon supported titania catalyst[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2012. http://cdmd.cnki.com.cn/Article/CDMD-10287-1014006049.htm
[12]	黄继辉, 童华, 童志权, 张俊峰, 黄妍. H₂O和SO₂对Mn-Fe/MPS催化剂用于NH₃低温还原NO的影响[J].过程工程学报, 2008, 8(16):517-522. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hgyj200803018 HUANG Ji-hui, TONG Hua, TONG Zhi-quan, ZHANG Jun-feng, HUANG Yan. Effect of H₂O and SO₂ on Mn-Fe/MPS catalysts for NO reduction by NH₃ at low temperature[J]. Chin J Process Eng, 2008, 8(16):517-522. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hgyj200803018
[13]	CENTENO M A, CARRZOSA I, ODRIOZOIA J A. NO-NH₃ coad sorption on vanadia/titania catalysts:Determination of the reduction degree of vanadium[J]. Appl Catal B:Environ, 2001, 29(4):307-314. doi: 10.1016/S0926-3373(00)00214-9
[14]	郑足红. Mn-V-Ce/TiO₂低温催化处理NO_x活性及抗毒化性能研究[D].湘潭: 湘潭大学, 2009. http://cdmd.cnki.com.cn/Article/CDMD-10530-2010012438.htm ZHENG Zhu-hong. Low temperature catalytic treatment of NO_x with Mn-V-Ce/TiO₂ and its anti-toxicity performance[D]. Xiangtan: Xiangtan University, 2009. http://cdmd.cnki.com.cn/Article/CDMD-10530-2010012438.htm
[15]	GASIOR M, HABER J, MACHEJ T, CZEPPE T. Mechanism of the reaction NO+NH₃ on V₅O₂ catalysts[J]. J Mol Catal, 1988, 43(3):359-369. doi: 10.1016/0304-5102(88)85147-2
[16]	TOPSØE N Y, TOPSØE H, DUMESIC J A. Vanadia/titania catalysts for selective catalytic reduction (SCR) of nitric-oxide by ammonia:Ⅰ. Combined temperature-programmed in-situ, ftir and on-line mass-spectroscopy studies[J]. J Catal, 1995, 151(1):226-240. doi: 10.1006/jcat.1995.1024
[17]	TOPSØE N Y. Characterization of the nature of surface sites on vanadia-titania catalysts by FTIR[J]. J Catal, 1991, 128(2):499-511. doi: 10.1016/0021-9517(91)90307-P
[18]	ZHENG Y, JENSEN A D, JOHNSSON J E. Deactivation of V₂O₅-WO₃-TiO₂ SCR catalyst at a biomass-fired combined heat and power plant[J].Appl Catal B:Environ, 2005, 60(3/4):253-264. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=42d7a4e07ea28dd4a7cd809f85ca684d
[19]	KRÖCHER O, ELSENER M. Chemical deactivation of V₂O₅/WO₃-TiO₂ SCR catalysts by additives and impurities from fuels, lubrication oils and urea solution Ⅰ.Catalytic studies[J]. Appl Catal B:Environ, 2008, 77(3/4):215-2227. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=41b830f008a174fb8cbb66f274c9e417
[20]	CHEN L, LI J, GE M. The poisoning effect of alkali metals doping over nano V₂O₅-WO₃/TiO₂ catalysts on selective catalytic reduction of NO_x by NH₃[J]. Chem Eng J, 2011, 170(2/3):531-537. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=399fd63147e1906cfaa41d3df0ae8a45
[21]	姜烨.钛基SCR催化剂及其钾、铅中毒机理研究[D].杭州: 浙江大学, 2010. http://cdmd.cnki.com.cn/Article/CDMD-10335-1011052213.htm JIANG Ye. Titanium-based SCR catalyst and its mechanism of potassium and lead poisoning[D]. Hangzhou: Zhejiang University, 2010. http://cdmd.cnki.com.cn/Article/CDMD-10335-1011052213.htm