SCI和EI收录∣中国化工学会会刊

›› 2011, Vol. 19 ›› Issue (3): 439-445.

• CATALYSIS, KINETICS AND REACTORS • Previous Articles     Next Articles

Aromatization of Methanol over La/Zn/HZSM-5 Catalysts

NI Youming1, SUN Aiming1, WU Xiaoling1, HU Jianglin1, LI Tao1,2, LI Guangxing1,2   

  1. 1. School of Chemistry&Chemical Engineering, Huazhong University of Science&Technology, Wuhan 430074, China;
    2. Hubei Key Laboratory of Materials Chemistry&Service Failure, Huazhong University of Science&Technology, Wuhan 430074, China
  • Received:2010-12-13 Revised:2011-03-30 Online:2011-06-28 Published:2011-06-28
  • Supported by:
    Supported by the Fundamental Research Funds for the Central Universities,HUST(Z2009008);the National Natural Science Foundation of China(20973068)

Aromatization of Methanol over La/Zn/HZSM-5 Catalysts

倪友明1, 孙爱明1, 吴小岭1, 胡江林1, 李涛1,2, 李光兴1,2   

  1. 1. School of Chemistry&Chemical Engineering, Huazhong University of Science&Technology, Wuhan 430074, China;
    2. Hubei Key Laboratory of Materials Chemistry&Service Failure, Huazhong University of Science&Technology, Wuhan 430074, China
  • 通讯作者: LI Tao, E-mail: taoli@mail.hust.edu.cn;LI Guangxing, E-mail: ligxabc@163.com
  • 基金资助:
    Supported by the Fundamental Research Funds for the Central Universities,HUST(Z2009008);the National Natural Science Foundation of China(20973068)

Abstract: Aromatization of methanol over co-impregnated La/Zn/HZSM-5 zeolite catalyst was studied.The selectivity of aromatics and BTX(benzene,toluene,and xylene)reached 64.0% and 56.6%,respectively,using La/Zn/HZSM-5 at 437℃,0.1 MPa and methanol WHSV(weight hourly space velocity)=0.8 h-1.Catalytic results showed that the La species was a very good promoter,increased selectivity of aromatics,and prolonged the catalyst lifetime on stream.The effects of the SiO2/Al2O3 ratio in zeolite,Zn and La loading,WHSV,reaction temperature, water content in the feed and H2 pretreatment of catalysts on the catalytic performance were studied in detail. Characterizations of the catalysts by thermogravimetric analysis(TGA),NH3-TPD(temperature programmed desorption),SEM(scanning electron micrograph),N2 adsorption-desorption,XRD(X-ray diffraction) and XRF (X-ray fluorescence),were carried out to understand the structure and discuss the aromatization performance of La/Zn/HZSM-5 zeolite catalyst.

Key words: methanol, aromatization, La, Zn, ZSM-5

摘要: Aromatization of methanol over co-impregnated La/Zn/HZSM-5 zeolite catalyst was studied.The selectivity of aromatics and BTX(benzene,toluene,and xylene)reached 64.0% and 56.6%,respectively,using La/Zn/HZSM-5 at 437℃,0.1 MPa and methanol WHSV(weight hourly space velocity)=0.8 h-1.Catalytic results showed that the La species was a very good promoter,increased selectivity of aromatics,and prolonged the catalyst lifetime on stream.The effects of the SiO2/Al2O3 ratio in zeolite,Zn and La loading,WHSV,reaction temperature, water content in the feed and H2 pretreatment of catalysts on the catalytic performance were studied in detail. Characterizations of the catalysts by thermogravimetric analysis(TGA),NH3-TPD(temperature programmed desorption),SEM(scanning electron micrograph),N2 adsorption-desorption,XRD(X-ray diffraction) and XRF (X-ray fluorescence),were carried out to understand the structure and discuss the aromatization performance of La/Zn/HZSM-5 zeolite catalyst.

关键词: methanol, aromatization, La, Zn, ZSM-5