摘要
采用共沉淀法和浸渍法，制备了一系列双碱金属促进的双碱土金属氧化物催化剂，发现其在甲苯氧化甲基化制苯乙烯的反应中表现出优异的催化性能。特别是催化剂Ｎａ＋Ｋ＋／ＭｇＯＣａＯ（摩尔比５∶５∶４５∶４５），在反应温度７５０℃，空速１４０００ｍＬ／（ｇ·ｈ），原料气分压比ＣＨ４∶Ｏ２∶Ｃ７Ｈ８∶Ｎ２＝１１．２∶２．１∶１∶１０．４时，Ｃ８（苯乙烯和乙苯）单程收率可达２３．３％。
The bialkali metal compounds promoted bialkaline earth metal oxides catalysts were prepared by coprecipitation and impregnation method. It was found that Na + K +/MgO CaO(the molar ratio is 5∶5∶45∶45) catalyst had excellent performances in the oxidative methylation of toluene with methane to styrene. The experiment have been carried out at a temperature of 750℃ and a space velocity of 1400mL/(g·h), with a CH 4∶O 2∶C 7H 8∶N 2 partial pressure ratio of 11.2∶2.1∶1∶10.4. The highest C 8 yield was...
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1997年第7期55-60,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省自然科学基金
关键词
甲苯
甲基化
苯乙烯
催化剂
反应条件
toluene
methylation
styrene
catalyst
reactant condition
