碳九原料中甲乙苯脱氢制备甲基苯乙烯催化剂研究
Study on Catalyst for the Preparation of Methylstyrene by Dehydrogenation of Methyl-ethylbenzene from Carbon-nine Raw Materials
高继东 1朱跃辉 1赵开径1
作者信息
- 1. 中石化(北京)化工研究院有限公司,北京 100013
- 折叠
摘要
本试验制备了Fe-K-Mo甲乙苯脱氢制备甲基苯乙烯催化剂,确定了:反应温度600～620℃,水烃比(质量比)2.5～3.0,液空速 0.7～1.0 h-1为优选甲乙苯脱氢催化剂的考察条件.研究了催化剂焙烧温度、铁源、钾铁比、助剂Mo对催化剂性能的影响,结果表明:催化剂在焙烧温度850℃、Fe(NO3)3铁源、钾铁比0.25、助剂Mo等条件下具备较好的转化率和选择性;通过XRD、TPR等测试表征显示,K2Fe22O34 相是甲乙苯脱氢的主要活性组分;Mo 助剂的加入在改善催化剂结构及促进活性等方面具有明显的效果,同时提高了Fe-K催化剂的热稳定性、抗氧化性.
Abstract
In this experiment,the Fe-K-Mo catalyst for the dehydrogenation of methylethylbenzene to methyl styrene was prepared,and it was determined that:Reaction temperature 600～620℃,water-hydrocarbon ratio(mass ratio)2.5～3.0,liquid space velocity 0.7～1.0 h-1 are the optimum conditions for the dehydrogenation of methyl ethylbenzene.The effects of calcination temperature,iron source,potassium-iron ratio and promotor Mo on catalyst performance were studied,the results show that the catalyst has good conversion and selectivity under calcination temperature of 850℃,Fe(NO3)3 iron source,potassium to iron ratio of 0.25 and promotor Mo;XRD and TPR tests indicate that K2Fe22O34 phase is the main active component of methyl ethylbenzene dehydrogenation;The addition of Mo additive has obvious effect on improving the structure and activity of the catalyst,and also improves the thermal stability and oxidation resistance of Fe-K catalyst.
关键词
甲乙苯/甲基苯乙烯/脱氢催化剂/Fe/K/助剂MoKey words
methyl ethylbenzene/methyl styrene/dehydrogenation catalyst/Fe/K/promotor Mo引用本文复制引用
出版年
2024
NETL
NSTL
万方数据