P-Al/NaX催化剂的合成及其甲苯甲醇侧链烷基化制苯乙烯性能研究  

Synthesis of P-Al/NaX catalyst and performance study of side-chain alkylation of toluene with methanol to styrene

作　　者：刘文龙 温月丽 王斌[1] Ahmad Faraz 李承达 黄伟[1,3] LIU Wenlong;WEN Yueli;WANG Bin;AHMAD Faraz;LI Chengda;HUANG Wei(Sate Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Coal Conversion Technology&Engineering Co.,Ltd.,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)

机构地区：[1]太原理工大学省部共建煤基能源清洁高效利用国家重点实验室,山西太原030024 [2]太原理工大学环境科学与工程学院,山西太原030024 [3]太原理工大学山西太原理工煤转化技术工程有限公司,山西太原030024

出　　处：《天然气化工—C1化学与化工》2022年第5期64-71,共8页Natural Gas Chemical Industry

基　　金：国家自然科学基金(21336006);山西省自然科学基金(201601D011021、201601D202017)。

摘　　要：为了提高催化剂在甲苯甲醇侧链烷基化制苯乙烯反应中的稳定性及苯乙烯选择性,采用水热法合成了不同P、Al含量(物质的量)的P-Al/NaX催化剂,并负载质量分数为9%的NaOH,探究了该系列催化剂在甲苯甲醇侧链烷基化中的催化性能。结合X射线衍射(XRD)、CO_(2)-TPD和NH_(3)-TPD等表征结果和催化活性数据发现,水热法合成的含有磷铝硅酸盐Na_(13)Al_(24)Si_(13)P_(11)O_(96)·H_(2)O 结构的P-Al/NaX催化剂表现出高的苯乙烯选择性,其中Cat-3-9Na催化剂的乙苯和苯乙烯总收率达到73.57%,苯乙烯选择性达到28.18%。通过催化剂连续反应6天的活性数据发现,该系列催化剂表现出良好的稳定性。In order to improve the stability and styrene selectivity of t he catalyst in the side-chain alkylation of toluene with methan ol,P-Al/NaX catalysts with different P and Al contents(amount of substance)were synthesized by hydrothermal method and loaded with 9%(mass fraction)NaOH.The catalytic performance of this series of catalysts in the side-chain alkylation of toluene with methanol was studied.Combined with X-ray diffraction(XRD),CO_(2)-TPD,NH_(3)-TPD characterization results and catalytic activity data,it is found that P-Al/NaX catalyst containing phosphoaluminosilicate Na_(13)Al_(24)Si_(13)P_(11)O_(96)·H_(2)O structure synthesized by hydrothermal method shows high styrene selectivity.The total yield of ethylbenzene and styrene of Cat-3-9Na cataly st is 73.57%,and the selectivity of styrene is 28.18%.By the activity data for 6 consecutive da ys,it is found that this series of catalysts shows good stabil ity.

关 键 词：P-Al/NaX 水热法 酸碱性位 侧链烷基化 苯乙烯 

分 类 号：TQ241.1[化学工程—有机化工]