摘要
采用浸渍法制备了不同负载量Mo掺杂Ce/GE催化剂,对其脱硝性能进行了测试,初步探明了Mo掺杂Ce/GE催化剂促进SCR活性增强的内在机制。结果表明,Mo的添加使nCe3+/(nCe3++nCe4+)比率增加、表面吸附氧(Oβ)含量增加及催化剂酸性位点增加,从而提高催化剂的脱硝活性。与5Ce/GE和5Mo/GE相比,5Ce-5Mo/GE催化剂脱硝性能更加优异。当Mo负载量为5%时,催化剂脱硝活性最好,在250℃时NOx转化率达到了99%。此外,5Ce-5Mo/GE催化剂具有较好的抗硫性能。
Mo-doped Ce/GE catalysts with different loading amounts were prepared by impregnation method, which were examined as catalysts in the selective catalytic reduction of NOx by NH3（NH3-SCR）. Furthermore, the intrinsic mechanism of Mo-doped Ce/GE catalysts for enhancing SCR activity was preliminarily investigated. It was found that the addition of Mo can increase the ratio of nCe3＋/（nCe3＋＋nCe4＋）, the oxygen content on the surface and the acid sites of the catalyst, thus enhancing SCR activity. Compared with 5Ce/GE and 5Mo/GE, 5Ce-5Mo/GE catalyst showed more outstanding catalytic activity. In addition, the catalyst exhibited the best activity and almost 99% conversion of NOx at 250℃, when the loading amount is 5%. 5Ce-5Mo/GE catalyst exhibited good sulfur resistance performance.
作者
李鹏
李智芳
耿翠
康燕
张超
杨长龙
LI Peng;LI Zhi-Fang;GENG Cui;KANG Yan;ZHANG Chao;YANG Chang-Long(College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar,Heilongjiang 161006,China;College of Materials Science and Engineering,Qiqihar University,Qiqihar,Heilongjiang 161006,China;Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials,Qiqihar,Heilongjiang 161006,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2018年第12期2205-2210,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.51708309)
黑龙江省自然科学基金(No.QC2017065)
黑龙江省教育厅基本科研业务专项(No.135109303
135109103)
黑龙江省教育厅"植物性食品加工技术特色学科"专项(No.YSTSXK201872)
齐齐哈尔市科委(No.GYGG-090013-1)
齐齐哈尔大学创新创业计划资助项目
