微波水热晶化温度和时间对Cu-SSZ-13催化剂的脱硝性能影响
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- 英文论文题名：Effects of Crystallization Temperature and Time on the Selective Catalytic Reduction of NO_x by NH_3 Over Cu-SSZ-13 Catalyst Prepared under Microwave heating
- 论文作者：张国佩 ; 俞华锋 ; 韩丽娜 ; 常丽萍 ; 鲍卫仁 ; 王建成
- 英文论文作者：Guopei Zhang ; Huafeng Yu ; Lina Han ; Liping Chang ; Wei-ren Bao ; Jiancheng Wang ; Key Laboratory of Coal Science and Technology ; Ministry of Education and Shanxi Province ; Taiyuan University of Technology ; College of Materials Science and Engineering ; Taiyuan University of Technology
- 年：2016
- 作者机构：太原理工大学煤科学与技术教育部和山西省重点实验;太原理工大学材料科学与工程学院;
- 论文关键词：柴油车尾气 ; 微波水热合成 ; Cu-SSZ-13 ; NH3-SCR
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十二分会： 多孔功能材料
- 语种：中文
- 分类号：X701;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十二分会 ; 多孔功能材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：168k
- 原文格式：D
- 会议级别：全国
摘要
随着NO_x排放的日趋严重,氨气-选择性催化还原技术(NH_3-SCR)成为脱除氮氧化物的最有效方法之一。Cu-SSZ-13催化剂因其优异的NH_3-SCR催化反应活性、选择性及水热稳定性,使其成为新一代的柴油车脱硝催化剂。Cu-SSZ-13催化剂制备方面的研究主要集中于模板剂改进和孔道尺寸调控方面,而对其加热方式的改进的研究尚欠缺。本文将微波加热引入到Cu-SSZ-13催化剂制备过程中,系统考察微波水热法晶化时间和温度对其脱硝活性的影响。结果表明,低温(145oC和160oC)晶化制得样品具有优异的低温和高温NH_3-SCR活性,晶化温度为190oC晶化制得样品表现出良好的反应选择性,晶化温度为175oC条件下制得催化剂展现出优异的水热稳定性。晶化时间超过2 h之后,晶化时间的延长对催化剂的脱硝活性、选择性及水热稳定性几乎无影响。
As NO_x emissions increased gradually,ammonia-selective catalytic reduction(NH3-SCR) has become one of most effective method for removing NO_x.Cu-SSZ-13 catalysts,owing to its excellent catalytic activity,selectivity and hydrothermal stability,become a new generation catalysts reducing NO_x from diesel vehicles.The study of Cu-SSZ-13 preparation mainly focus on the modification of template agent and pore size,but the research on the improvement of heating mode is still lacking.In this paper,we used microwave heating for preparing Cu-SSZ-13,and systematically studied the effects of crystallization time and temperature on catalytic activity.The results indicate that the samples prepared under low temperature(145℃ and 160℃) display excellent low and high-temperature performance,the samples obtained at temperature of 190℃ show better reaction selectivity,the samples prepared at 175℃ exhibit outstanding hydrothermal stability,and the crystallization time almost has no effect on the activity,selectivity and hydrothermal stability when it exceed 2h.
As NO_x emissions increased gradually,ammonia-selective catalytic reduction(NH3-SCR) has become one of most effective method for removing NO_x.Cu-SSZ-13 catalysts,owing to its excellent catalytic activity,selectivity and hydrothermal stability,become a new generation catalysts reducing NO_x from diesel vehicles.The study of Cu-SSZ-13 preparation mainly focus on the modification of template agent and pore size,but the research on the improvement of heating mode is still lacking.In this paper,we used microwave heating for preparing Cu-SSZ-13,and systematically studied the effects of crystallization time and temperature on catalytic activity.The results indicate that the samples prepared under low temperature(145℃ and 160℃) display excellent low and high-temperature performance,the samples obtained at temperature of 190℃ show better reaction selectivity,the samples prepared at 175℃ exhibit outstanding hydrothermal stability,and the crystallization time almost has no effect on the activity,selectivity and hydrothermal stability when it exceed 2h.
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