文章摘要
黄金花,杨丙星,夏克,叶丽萍,罗勇.MOx/Y催化剂常温催化臭氧氧化甲苯的性能[J].精细化工,2019,36(6):
MOx/Y催化剂常温催化臭氧氧化甲苯的性能
The catalytic performance of MOx/Y catalyst in toluene oxidation with ozone at room temperature
投稿时间:2018-09-19  修订日期:2018-12-17
DOI:
中文关键词: 常温  臭氧  甲苯  MnO2  CuO  Y分子筛
英文关键词: room temperature  ozone  toluene  MnO2  CuO  Y zeolite
基金项目:
作者单位E-mail
黄金花 上海化工研究院有限公司 huangjinhua15@163.com 
杨丙星 上海化工研究院有限公司  
夏克 上海化工研究院有限公司  
叶丽萍 上海化工研究院有限公司 ylp_by@126.com 
罗勇 上海化工研究院有限公司  
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中文摘要:
      采用等体积浸渍法制备MOx/Y催化剂,用于常温催化臭氧氧化甲苯反应。采用X射线衍射(XRD)、N2吸附-脱附、氢气程序升温还原(H2-TPR)、甲苯吸附等方法对催化剂结构进行表征。结果表明:10%MnO2/Y催化剂具有较大的比表面积和孔容积,较好的甲苯吸附性能,促进甲苯与臭氧充分反应,有利于甲苯转化率和COx选择性的提高;第二组分CuO的加入,CuO与MnO2之间存在相互作用,提高了氧化还原性能,促进产物中CO进一步氧化转化为CO2,进而提高COx中CO2与CO摩尔比。在常温催化臭氧氧化甲苯反应中,5%MnO2-5%CuO/Y催化剂表现出较优的催化活性,t95为240 min,COx选择性为80.6%,CO2与CO摩尔比为4.970。GC-MS结果表明,反应副产物苯甲酸和甲酸苯甲酯堵塞催化剂孔道,占据催化剂表面活性位,导致催化剂失活。
英文摘要:
      10%MOx/Y (M= Mn, Co, Ni, Fe, Ce, Cu) and 5%MnO2-5%MOx/Y (M= Ce, Co, Cu) catalysts prepared by incipient-wetness impregnation method for toluene oxidation with ozone at room temperature. The catalysts were characterized by XRD, BET, H2-TPR and toluene adsorption techniques. The re-sults revealed that 10%MnO2/Y catalyst showed a larger surface area and pore volume, a better tolu-ene adsorption performance, promoting the reaction of toluene oxidation with ozone and the further oxidation of the by-products, thus, 10%MnO2/Y catalyst gave a higher toluene conversion and COx selectivity. With the addition of CuO, the interaction between CuO and MnO2 improved the reduction property of 10%MnO2/Y catalyst and promoted the further oxidation of CO into CO2 with a higher CO2: CO molar ratio. Thus, 5%MnO2-5%CuO/Y catalyst exhibited a high catalytic activity in toluene oxidation with ozone at room temperature with t95 of 240 min, COx selectivity of 80.6% and CO2: CO molar ratio of 4.970. It could be speculated from the results of GC-MS that benzociacid and formic acid phenylmethyl ester as the by-products blocked the catalysts pores and occupied active sites on the surface of the catalysts, resulting in the inactivation of the catalysts.
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