[1]王瑞,归柯庭,梁辉.La1-xCexxMnO3/赤铁矿催化剂的制备与低温SCR脱硝特性[J].东南大学学报(自然科学版),2016,46(6):1234-1239.[doi:10.3969/j.issn.1001-0505.2016.06.021]
 Wang Rui,Gui Keting,Liang Hui.Preparation and low-temperature SCR de-NOxx features of supported catalyst La1-xCexxMnO3/hematite[J].Journal of Southeast University (Natural Science Edition),2016,46(6):1234-1239.[doi:10.3969/j.issn.1001-0505.2016.06.021]
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La1-xCexxMnO3/赤铁矿催化剂的制备与低温SCR脱硝特性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第6期
页码:
1234-1239
栏目:
能源与动力工程
出版日期:
2016-11-20

文章信息/Info

Title:
Preparation and low-temperature SCR de-NOxx features of supported catalyst La1-xCexxMnO3/hematite
作者:
王瑞归柯庭梁辉
东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096
Author(s):
Wang Rui Gui Keting Liang Hui
Key Laboratory of Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
LaMnO3 Ce 柠檬酸络合浸渍法 铁矿石
Keywords:
LaMnO3 Ce citric acid complexing method iron ore
分类号:
TK121
DOI:
10.3969/j.issn.1001-0505.2016.06.021
摘要:
采用柠檬酸络合浸渍法在赤铁矿上负载活性物质锰酸镧(LaMnO3),并通过调节Ce离子掺杂量、活性物质负载量,制备了一系列用于烟气SCR脱硝的催化剂.实验考察了NH3还原剂条件下La1-xCexxMnO3/赤铁矿催化剂的低温催化脱硝活性,采用XRD,BET,H2-TPR 和NH3-TPD等表征方法对催化剂晶体结构、比表面积和氧化还原性等进行研究.结果表明,LaMnO3/赤铁矿催化剂具有较好的催化活性,Ce的适量掺杂可改善LaMnO3/赤铁矿催化剂的氧化还原能力、NH3分子的吸附能力和表面微观形貌,并使活性物质均匀负载在载体表面上,促使反应物NH3,O2,NO更容易吸附在催化剂表面发生反应,提高脱硝效率,改善LaMnO3/赤铁矿催化剂的低温活性, La0.8Ce0.2MnO3/赤铁矿催化剂在空速9 000 h-1,180 ℃条件下催化还原NO转化率可达98%.
Abstract:
A series of lanthanum manganite perovskite catalysts La1-xCexxMnO3/hematite were prepared by adjusting the amounts of Ce doped and the LaMnO3 loaded on hematite with the citric acid complexing method. The catalyst sample was investigated by XRD(X-ray diffraction),BET, H2-TPR(temperature programmed desorption)and NH3-TPD(temperature programmed reduction)methods to characterize its crystal structure, specific surface area and the ability of redox. An experiment was carried out to study the low-temperature catalytic denitration activity of catalyst La1-xCexxMnO3/hematite.The results show that catalyst LaMnO3/hematite has a good catalytic activity, and the catalysts doped with Ce properly have a stronger ability of redox, NH3 adsorption capacity, and a better surface topography. It also makes the active component be more uniformly supported on the support surface and the reactants(NH3, O2 and NO)be more easily adsorbed on the catalyst surface to react. The de-NOxx efficiency is improved. Therefore, properly doping Ce on the LaMnO3/hematite can further improve its low temperature catalytic activity, and the catalyst La0.8Ce0.2MnO3/hematite can achieve a maximum NO conversion rate of 98% at 180 ℃ at a space velocity of 9 000 h-1.

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备注/Memo

备注/Memo:
收稿日期: 2016-02-29.
作者简介: 王瑞(1990—),女,硕士生;归柯庭(联系人),男,博士,教授,博士生导师, ktgui@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51276039).
引用本文: 王瑞,归柯庭,梁辉.La1-xCexxMnO3/赤铁矿催化剂的制备与低温SCR脱硝特性[J].东南大学学报(自然科学版),2016,46(6):1234-1239. DOI:10.3969/j.issn.1001-0505.2016.06.021.
更新日期/Last Update: 2016-11-20