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

作　　者：高继东[1] 朱跃辉[1] 赵开径[1] Gao Jidong;Zhu Yuehui;Zhao Kaijing(SINOPEC(Beijing)Research Institute of Chemical Industry Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中石化(北京)化工研究院有限公司,北京100013

出　　处：《广东化工》2024年第11期1-3,31,共4页Guangdong Chemical Industry

基　　金：中国石油化工股份有限公司科研项目(11-20ZS0204)。

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(NO_(3))_(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,K_(2)Fe_(22)O_(34)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。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(NO_(3))_(3) iron source,potassium to iron ratio of 0.25 and promotor Mo;XRD and TPR tests indicate that K_(2)Fe_(22)O_(34) 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Mo 

分 类 号：TQ[化学工程]