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[1]杨波,沈岳松,祝社民,等.Mn-La-Ce-Ni-Ox低温脱硝的影响因素[J].南京工业大学学报(自然科学版),2015,37(05):6-11.[doi:10.3969/j.issn.1671-7627.2015.05.002]
 YANG Bo,SHEN Yuesong,ZHU Shemin,et al.Influence factors on low-temperature deNOx performance of Mn-La-Ce-Ni-Ox[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(05):6-11.[doi:10.3969/j.issn.1671-7627.2015.05.002]
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Mn-La-Ce-Ni-Ox低温脱硝的影响因素()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年05期
页码:
6-11
栏目:
出版日期:
2015-09-10

文章信息/Info

Title:
Influence factors on low-temperature deNOx performance of Mn-La-Ce-Ni-Ox
文章编号:
1671-7627(2015)05-0006-06
作者:
杨波1沈岳松1祝社民1曾燕伟1沈树宝2
1.南京工业大学 材料科学与工程学院,江苏 南京 210009; 2.南京工业大学 生命与制药工程学院,江苏 南京 211800
Author(s):
YANG Bo1SHEN Yuesong1ZHU Shemin1ZENG Yanwei1SHEN Shubao2
1.College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China; 2.College of Biotechnology and Pharmaceutical Engineering,Nanjing Tech University,Nanjing 211800,China
关键词:
低温脱硝 Mn-La-Ce-Ni-Ox 选择性催化还原 抗SO2 抗H2O
Keywords:
low-temperature deNOx Mn-La-Ce-Ni-Ox selective catalytic reduction SO2 tolerance H2O tolerance
分类号:
TQ426、X701
DOI:
10.3969/j.issn.1671-7627.2015.05.002
文献标志码:
A
摘要:
采用共混法制备系列Mn-La-Ce-Ni-Ox复合氧化物脱硝催化剂,考察了金属元素配比、反应温度、空速、n(NH3)/n(NO)、水蒸气和SO2对催化剂低温NH3选择性催化还原法(SCR)脱除NO的影响。运用X线衍射仪(XRD)、N2吸附分析仪、傅里叶变换红外光谱仪(FT-IR)等表征,分别对催化剂的固相结构、比表面积、孔径分布和官能团结构进行分析。结果表明:当n(Mn):n(La):n(Ce):n(Ni)为2.5:2.5:1:1时,催化剂在活性温度110~300 ℃内NH3-SCR脱除NO效率最高; 5 000 h-1以下空速对脱硝活性无影响; 脱硝活性随NH3与NO摩尔比的增大而增大(n(NH3)/n(NO)≤1.0时),NH3过量无影响; 140 ℃时,同时通入水蒸气和SO2 后,催化剂脱除NO 效率仍保持在80%以上。Mn2.5-La2.5-Ce-Ni-Ox催化剂比表面积大,具有中等孔不受限制的单分子层和多分子层的吸附特征。
Abstract:
A series of Mn-La-Ce-Ni-Ox complex oxides were prepared by a chemical blend method for selective catalytic reduction(SCR)of NO at low-temperature.Effects of molar ratio on metal elements,reaction temperature,space velocity,n(NH3)/n(NO),H2O and SO2 on catalytic performance of the Mn-La-Ce-Ni-Ox for NH3-SCR of NOx were studied.The solid-phase structure,specific surface area,distributions of pore diameter and volume, and functional group structure of the catalysts were characterized by X-ray diffraction(XRD),N2 adsorption and Fourier transform infrared spectroscopy(FT-IR).Results showed that the Mn-La-Ce-Ni-Ox(n(Mn):n(La):n(Ce):n(Ni)=2.5:2.5:1:1 in mol)had the best NO removal efficiency at temperature range of 110 ℃-300 ℃.The NO removal efficiency was not effected by space velocity when it was less than 5 000 h-1; The NO removal efficiency increased with the increasing of n(NH3)/n(NO)as n(NH3)/n(NO)≤1.0 and unchanged as n(NH3)/n(NO)>1.0.The NO removal efficiency was still above 80% by injecting SO2 and H2O at 140 ℃.Mn2.5-La2.5-Ce-Ni-Ox had a large specific surface area and middle pore had no limitation in monolayer and multimolecular layer adsorption.

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备注/Memo

备注/Memo:
收稿日期:2014-09-01
基金项目:国家“十二五”科技支撑计划(2012BAE01B03); 国家自然科学基金(51272105,21106071); 江苏省环保科研课题(2012016); 江苏省普通高校研究生科研创新计划(KYZZ_0220); 江苏高校优势学科建设工程
作者简介:杨波(1987—),男,甘肃天水人,博士生,主要研究方向为环保催化材料; 祝社民(联系人),教授,E-mail:zsm313@njtech.edu.cn.
引用本文:杨波,沈岳松,祝社民,等.Mn-La-Ce-Ni-Ox低温脱硝的影响因素[J].南京工业大学学报:自然科学版,2015,37(5):6-11..
更新日期/Last Update: 2015-09-20