Inorganic Chemicals Industry >

2022 , Vol. 54 >Issue 2: 123 - 128

DOI: https://doi.org/10.19964/j.issn.1006-4990.2021-0251

Catalytic Materials

Synthesis of nano Ga-ZSM-5 zeolite and its application in alkylation of benzene with dilute ethylene

  • Zhuohan XIE ,
  • He HAN ,
  • Xiaoguo LI ,
  • Yongkun ZHANG ,
  • Zhanggui HOU ,
  • Kai BIAN ,
  • Anfeng ZHANG ,
  • Xinwen GUO ,
  • Chunshan SONG
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  • 1. State Key Laboratory of fine Chemicals,School of Chemical Engineering,Dalian University of Technology,Dalian 116021,China
    2. Research Institute of Refining and Petrochemicals,CNOOC

Received date: 2021-04-17

  Online published: 2022-03-14

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Abstract

A series of nano Ga-ZSM-5 zeolites with different Si/Ga ratio were synthesized with seed-oriented method.Ga-ZSM-5 catalysts were obtained with extrusion molding,acid pickling and high temperature roasting.The structure and acid properties of Ga-ZSM-5 zeolites were characterized by various techniques and their catalytic performance in the alkylation of benzene with dilute ethylene were evaluated.The results showed that hydrothermal synthesized Ga-ZSM-5 molecular sieves exhibited intergrown morphologies and uniform particle size.Compared with Al-ZSM-5 zeolites with the same n（Si）/n（T）（T was metal atom）,the acid content and acid strength of Ga-ZSM-5 zeolites were significantly reduced.Under the reaction conditions of T=360 ℃,P=1.4 MPa,weight hourly space velocity（WHSV） of ethylene=1.5 h-1,n（benzene）∶n（ethylene）=1∶1,n（ethylene）∶n（nitrogen）=1∶5.67,Ga-ZSM-5 zeolites catalysts showed higher ethylbenzene selectivity and 30%~50% reduction for xylene selectivity compared with Al-ZSM-5.In addition,Ga-ZSM-5 zeolites catalyst remained stable during the time on stream of 100 h with stronger coke-resistant capacity.

Key words： Ga-ZSM-5; alkylation of benzene with dilute ethylene; ethylbenzene; acid properties

Cite this article

Zhuohan XIE , He HAN , Xiaoguo LI , Yongkun ZHANG , Zhanggui HOU , Kai BIAN , Anfeng ZHANG , Xinwen GUO , Chunshan SONG . Synthesis of nano Ga-ZSM-5 zeolite and its application in alkylation of benzene with dilute ethylene[J]. Inorganic Chemicals Industry, 2022 , 54(2) : 123 -128 . DOI: 10.19964/j.issn.1006-4990.2021-0251

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