EFFECT OF PREPARATION METHODS OF CuO-WO3/TiO2 CATALYSTS ON NH3-SCR DENITRATION ACTIVITY

LIU Hai-yan; LI Dong; MIAO Xue; ZHU Yuan-yuan; LIU Xiao-feng; LV Ying; LI Jie; WU Ping-xia; PENG Yue; CHEN Jian-jun; LI Jun-hua

doi:10.13205/j.hjgc.202005016

Volume 38 Issue 5

Aug. 2020

Turn off MathJax

Article Contents

Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(5): 89-95

LIU Hai-yan, LI Dong, MIAO Xue, ZHU Yuan-yuan, LIU Xiao-feng, LV Ying, LI Jie, WU Ping-xia, PENG Yue, CHEN Jian-jun, LI Jun-hua. EFFECT OF PREPARATION METHODS OF CuO-WO3/TiO2 CATALYSTS ON NH3-SCR DENITRATION ACTIVITY[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(5): 89-95. doi: 10.13205/j.hjgc.202005016

Citation:

LIU Hai-yan, LI Dong, MIAO Xue, ZHU Yuan-yuan, LIU Xiao-feng, LV Ying, LI Jie, WU Ping-xia, PENG Yue, CHEN Jian-jun, LI Jun-hua. EFFECT OF PREPARATION METHODS OF CuO-WO₃/TiO₂ CATALYSTS ON NH₃-SCR DENITRATION ACTIVITY[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(5): 89-95. doi: 10.13205/j.hjgc.202005016

Citation:

PDF( 1637 KB)

EFFECT OF PREPARATION METHODS OF CuO-WO₃/TiO₂ CATALYSTS ON NH₃-SCR DENITRATION ACTIVITY

doi: 10.13205/j.hjgc.202005016

LIU Hai-yan^1,2,
LI Dong^1,2,
MIAO Xue^1,2,
ZHU Yuan-yuan^1,2,
LIU Xiao-feng^1,2,
LV Ying^1,2,
LI Jie^1,2,
WU Ping-xia¹,
PENG Yue^1,2,
CHEN Jian-jun^{1,2
,
,},
LI Jun-hua²

1. Tsinghua-Yancheng Environmental Engineering Technology Research and Development Center, Yancheng 224000, China;
2. National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment, Tsinghua University, Beijing 100084, China

Received Date: 2019-10-10

Abstract

Abstract

xCuO-yWO₃/TiO₂ catalysts (x and y represent the mass fraction of CuO and WO₃ in the sample, respectively) were prepared by sol-gel method and impregnation method, respectively, and the SCR denitration performance (NH₃-SCR) of the catalysts was evaluated in a miniature fixed-bed quartz reactor. It was found that the 2CuO-6WO₃/TiO₂ catalyst by the sol-gel method had good denitration performance, and made NO_x conversion rate over 90% in temperature range of 250~350 ℃, which activity was improved significantly compared with 2CuO-6WO₃/TiO₂ catalyst by impregnation method. The prepared catalysts were characterized by BET, XRD, H₂-TPR, NH₃-TPD and XPS. The results showed that for the 2CuO-6WO₃/TiO₂ catalyst prepared by sol-gel method, the specific surface area, the surface adsorbed oxygen, the redox potential and adsorption capacity of NH₃ increased significantly than the catalyst prepared by the impregnation method. Therefore, the 2CuO-6WO₃/TiO₂ catalyst prepared by sol-gel method exhibited excellent NH₃-SCR activity and high N₂ selectivity.
- sol-gel method,
- impregnation method,
- de-NO_x catalyst,
- coopper oxide,
- tungsten oxide

FullText(HTML)

References(24)

References

郝吉明, 马广大, 大气污染控制工程[M]. 2版. 北京: 高等教育出版,2002.

崔海峰, 谢峻林, 李凤祥, 等. SCR烟气脱硝技术的研究与应用[J]. 硅酸盐通报, 2016, 35(3): 805-809.

郭坤, 宋常, 张闻涛. 超声波浸渍法制备V₂O₅-WO₃-TiO₂选择性催化还原脱硝催化剂[J]. 环境工程, 2016, 31(2): 76-79.

钟秦. 燃煤烟气脱硫脱硝技术及工程实例[M]. 北京: 化学工业出版社, 2007.

杨玲, 李茂, 李建军. SCR催化剂的研究进展[J]. 四川化工, 2012(15): 26-29.

王玉云, 沈岳松, 纵宇浩, 等. Co、Ni掺入对Pd-Rh型催化剂三效净化C₃H₈、CO、NO的影响[J]. 环境工程, 2015, 33(2): 62-68.

郭丽颖, 朱林, 庄柯, 等. 钨对高钒燃气脱硝催化剂的改性及SCR反应历程研究[J]. 环境工程, 2019, 37(5): 160-166

,172.

张强. 燃煤电站SCR烟气脱硝技术及工程应用[M]. 北京: 化学工业出版社, 2002.

努热曼古丽·图尔荪, 古丽戈娜, 张文河,等. Cu_xO(CuO-Cu₂O)纳米球催化剂制备及对CO₂电化学还原性能影响的研究[J]. 环境工程, 2016, 34(3): 102-106.

ZHANG H X, ZHANG H B, WANG P C, et al. Organic template-free synthesis of zeolite mordenite nanocrystals through exotic seed-assisted conversion[J]. RSC Advances, 2016, 6: 47623-47631.

YU T, HAO T, FAN D Q, et al. Recent NH₃-SCR mechanism research over Cu/SAPO-34 catalystp[J]. The Journal of Physical Chemistry C, 2016, 118(13): 6565-6575.

XIE L J, LIU F D, REN L M, et al. Excellent performance of one-pot synthesized Cu-SSZ-13 catalyst for the selective catalytic reduction of NO_x with NH₃[J]. Environmental Science & Technology, 2014, 48: 566-572.

WANG C, WANG J, WANG J Q, et al. The effect of sulfate species on the activity of NH₃-SCR over Cu/SAPO-34[J]. Applied Catalysis B: Environmental, 2017, 204: 239-249.

CORMA A, LI Z B, NAVARRO M T, et al. Synthesis of nano-SSZ-13 and its application in the reaction of methanol to olefins[J]. Catalysis Science & Technology, 2016, 6(13): 5856-5863.

HAN S, CHENG J, YE Q, et al. Ce doping to Cu-SAPO-18: enhanced catalytic performance for the NH₃-SCR of NO in simulated diesel exhaust[J]. Microporous and Mesoporous Materials, 2019,276: 133-146.

NING P, SONG Z X, LI H, et al. Selective catalytic reduction of NO with NH₃ over CeO₂-ZrO₂-WO₃ catalysts prepared by different methods[J]. Applied Surface Science, 2015, 332: 130-137.

LI K R, WANG Y J, WANG S R, et al. A comparative study of CuO/TiO₂-SnO₂, CuO/TiO₂ and CuO/SnO₂ catalysts for low-temperature CO oxidation[J]. Journal of Natural Gas Chemistry, 2009, 18: 449-452.

PENG Y, LI J H, CHEN L, et al. Alkali metal poisoning of a CeO₂-WO₃ catalyst used in the selective catalytic reduction of NO_x with NH₃: an experimental and theoretical study[J]. Environmental Science & Technology, 2012, 46: 2864-2869.

KANG M, PARK E D, KIM J M,et al. Cu-Mn mixed oxides for low temperature NO reduction with NH₃[J]. Catalysis Today, 2006, 111: 236-241.

MA Z R, WENG D, WU X D, et al. A novel Nb-Ce/WO_x-TiO₂ catalyst with high NH₃-SCR activity and stability[J]. Catalysis Communications, 2012, 27: 97-100.

SHAN W P, GENG Y, CHEN X L, et al. A highly efficient CeWO_x catalyst for the selective catalytic reduction of NO_x with NH₃[J]. Catalysis Science & Technology,2016, 6: 1195-1200.

LI X S, LI K Z, PENG Y,et al. Interaction of phosphorus with a FeTiO_x catalyst for selective catalytic reduction of NO_x with NH₃: influence on surface acidity and SCR mechanism[J]. Chemical Engineering Journal, 2018, 347: 173-183.

LIU Z M, SU H, CHEN B H, et al. Activity enhancement of WO₃ modified Fe₂O₃ catalyst for the selective catalytic reduction of NO_x by NH₃[J]. Chemical Engineering Journal, 2016, 299: 255-262.

ZHANG Q L, ZHANG Y Q, ZHANG T X, et al. Influence of preparation methods on iron-tungsten composite catalyst for NH₃-SCR of NO: the active sites and reaction mechanism[J]. Applied Surface Science, 2019, 36: 144190.

Relative Articles

Supplements(0)

Cited By

Proportional views