自我保护Nb_(2)O_(5)-S/CeO_(2)制备及其脱硝性能探索型实验设计  

Exploratory experimental design for preparation of self-protection Nb_(2)O_(5)-S/CeO_(2)and its denitration performance

作　　者：张贺 刘国权 王雁南[1] 展思辉[1] 翟利芳[1,2] ZHANG He;LIU Guoquan;WANG Yannan;ZHAN Sihui;ZHAI Lifang(College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China;Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution,Tianjin 300350,China)

机构地区：[1]南开大学环境科学与工程学院,天津300350 [2]天津市跨介质复合污染环境治理技术重点实验室,天津300350

出　　处：《实验技术与管理》2023年第4期103-107,共5页Experimental Technology and Management

基　　金：国家自然科学基金项目(22076082);国家自然科学基金面上项目(22176102);2022年南开大学实验课程改革项目(22NKSYKF01);2022年南开大学自制仪器项目(22NKZZYQ09)。

摘　　要：文章基于商用脱硝催化剂的应用现状,将“产学研用”理念融入大气污染控制工程实验,设计合成了一种具有自我保护机制的Nb_(2)O_(5)-S/CeO_(2)脱硝催化剂,并采用XRD、TEM、H_(2)-TPR、XPS、NH_(3)-TPD技术对催化剂进行了表征,选用in situ DRIFTs对反应机理进行了探究。实验结果表明,Nb_(2)O_(5)-S/CeO_(2)催化剂在较宽的温度窗口下表现出优异的催化活性。此外,当K沉积在Nb_(2)O_(5)-S/CeO_(2)催化剂上时,SO_(4)^(2-)将优先与K结合,从而有效阻止毒物攻击Ce-Nb活性位点。Based on the application status of commercial denitration catalysts,the concept of“production,education,research and application”was integrated into the air pollution control engineering experiment,and a Nb_(2)O_(5)-S/CeO_(2)denitration catalyst with self-protection mechanism was designed and synthesized.The catalyst was characterized by XRD,TEM,H_(2)-TPR,XPS,NH_(3)-TPD technology,and the reaction mechanism was explored by in situ DRIFTs.The experimental results showed that Nb_(2)O_(5)-S/CeO_(2)catalyst exhibited excellent catalytic activity in a wide temperature window.In addition,when K was deposited on Nb_(2)O_(5)-S/CeO_(2)catalyst,SO_(4)^(2-)–would preferentially combine with K,thus effectively preventing poison from attacking Ce-Nb active site.

关 键 词：脱硝 产学研用 抗碱中毒 机理探究 

分 类 号：G642.0[文化科学—高等教育学] X511[文化科学—教育学]