摘要
采用熔盐法生长莫来石晶须对堇青石进行表面改性,以堇青石/莫来石晶须复合材料为基体,采用溶胶凝胶浸渍法制备了LaCoO_(3)整体式cDPF(C/M/LC)和LaCo_(0.9)Mn_(0.1)O_(3)整体式cDPF(C/M/LCM),用扫描电子显微镜(SEM)、能谱分析(EDS)、X射线衍射(XRD)、H_(2)程序升温还原(H_(2)-TPR)等手段对整体式催化剂进行表征,结果表明,催化剂在载体表面均匀分布,Mn的引入可以显著提高催化剂的催化活性,且不改变钙钛矿本身的结构。超声振动处理表明,催化剂层与载体结合牢固,60 min超声处理后,失重为4.6%。催化性能测试证明,LaCo_(0.9)Mn_(0.1)O_(3)整体式cDPF对碳烟的催化活性更高,其T_(10),T_(50),T_(90)分别为329,417,516℃。
The surface modification of cordierite was carried out with mullite whiskers grown by the molten salt method.Using cordierite/mullite whiskers composite material as the matrix,LaCoO_(3)monolithic cDPF(C/M/LC)and LaCo_(0.9)Mn_(0.1)O_(3)monolithic cDPF(C/M/LCM)was prepared by the sol-gel impregnation method.The monolithic catalysts were characterized by means of microscopy(SEM),energy spectrum analysis(EDS),X-ray diffraction(XRD),H_(2) temperature programmed reduction(H_(2)-TPR)and other means.The results showsd that the catalyst was uniformly distributed on the support,and the introduction of Mn can significantly improve the catalytic activity of the catalyst without changing the structure of the perovskite itself.The ultrasonic vibration treatment showed that the catalyst layer and the carrier were firmly bonded,and after 60 min of ultrasonic treatment,the weight loss was 4.6%.The performance test results show that among the prepared catalysts,LaCo_(0.9)Mn_(0.1)O_(3)monolithic cDPF has higher catalytic activity for soot,and its T_(10),T_(50) and T_(90) are 329,417,516℃respectively.
作者
温伯霖
杜毅帆
舒荣禄
曹莉萍
张存社
王悦
王伟
WEN Bo-lin;DU Yi-fan;SHU Rong-lu;CAO Li-ping;ZHANG Cun-she;WANG Yue;WANG Wei(Department of Chemical Engineering,College of Environmental Science and Engineering,Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas,Ministry of Education,Chang’an University,Xi’an 710054,China;Shaanxi Key Laboratory of Fine Petroleum Chemicals, Shaanxi Chemical Industry Research Institute Co.,Ltd., Xi’an 710054,China)
出处
《应用化工》
CAS
CSCD
北大核心
2022年第4期942-947,952,共7页
Applied Chemical Industry
基金
国家自然科学基金重点项目(51678059)
陕西省重点研发计划(2019GY-179)
移动源污染排放控制技术国家工程实验室开放基金(NELMS2019B02)
陕西省土地恢复重点实验室开放基金(2018-JC10)。
