Please wait a minute...
Acta Physico-Chimica Sinica  2010, Vol. 26 Issue (02): 338-344    DOI: 10.3866/PKU.WHXB20100208
CATALYSIS AND SURFACE STRUCTURE     
Effect of Hydrothermal Treatment on the Acidity and Catalytic Performance of Nanosized HZSM-5 Zeolites for the Conversion of Methanol to Propene
MAO Dong-Sen, GUO Qiang-Sheng, MENG Tao, LU Guan-Zhong
Research Institute of Applied Catalysis, School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, P. R. China
Download:   PDF(283KB) Export: BibTeX | EndNote (RIS)      

Abstract  

A series of modified nanosized HZSM-5 zeolites were prepared by hydrothermal treatment at different temperatures and characterized by the adsorption and desorption of N2, X-ray diffraction (XRD), Al solid state magic angle spinning nuclear magnetic resonance (27Al MAS NMR), temperature-programmed desorption of ammonia (NH3-TPD), and Fourier transforminfrared (FT-IR) spectroscopy of adsorbed pyridine techniques. The conversion of methanol to propene was tested using a continuous flow fixed-bed microreactor at atmospheric pressure, 500 ℃, and a methanol weight hourly space velocity (WHSV) of 1.0 h-1. Results showed that after the appropriate hydrothermal treatment, some of Al was removed from the framework of zeolite and extracted out of the zeolite channels after treatment with an aqueous solution of citric acid. This led to a decrease in the strength and amount of acidic sites and an increase in the volume and diameter of the pores. As a result, propene selectivity and the reaction time continued to maintain the total conversion of methanol (i.e., life time of catalyst) increased significantly to 38.9%and 160 h from 30.1%and 75 h over the parent nanosized HZSM-5 zeolite. However, severe hydrothermal treatment decreased the acidity remarkably and the strongly acidic sites were almost totally destroyed, resulting in a remarkable decrease both in propene selectivity and catalyst stability.



Key wordsHydrothermal treatment      Nanosized HZSM-5 zeolite      Methanol      Propene      Selectivity      Stability     
Received: 13 October 2009      Published: 21 December 2009
MSC2000:  O643  
Corresponding Authors: MAO Dong-Sen     E-mail: dsmao@sit.edu.cn; dsmao1106@yahoo.com.cn
Cite this article:

MAO Dong-Sen, GUO Qiang-Sheng, MENG Tao, LU Guan-Zhong. Effect of Hydrothermal Treatment on the Acidity and Catalytic Performance of Nanosized HZSM-5 Zeolites for the Conversion of Methanol to Propene. Acta Physico-Chimica Sinica, 2010, 26(02): 338-344.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20100208     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2010/V26/I02/338

[1] YI Yanhui, WANG Xunxun, WANG Li, YAN Jinhui, ZHANG Jialiang, GUO Hongchen. Plasma-Triggered CH3OH/NH3 Coupling Reaction for Synthesis of Nitrile Compounds[J]. Acta Physico-Chimica Sinica, 2018, 34(3): 247-255.
[2] ZHONG Aiguo, LI Rongrong, HONG Qin, ZHANG Jie, CHEN Dan. Understanding the Isomerization of Monosubstituted Alkanes from Energetic and Information-Theoretic Perspectives[J]. Acta Physico-Chimica Sinica, 2018, 34(3): 303-313.
[3] QIAN Hui-Hui, HAN Xiao, ZHAO Yan, SU Yu-Qin. Flexible Pd@PANI/rGO Paper Anode for Methanol Fuel Cells[J]. Acta Physico-Chimica Sinica, 2017, 33(9): 1822-1827.
[4] YAN Hui-Jun, LI Biao, JIANG Ning, XIA Ding-Guo. First-Principles Study:the Structural Stability and Sulfur Anion Redox of Li1-xNiO2-ySy[J]. Acta Physico-Chimica Sinica, 2017, 33(9): 1781-1788.
[5] YU Jing-Hua, LI Wen-Wen, ZHU Hong. Effect of the Diameter of Carbon Nanotubes Supporting Platinum Nanoparticles on the Electrocatalytic Oxygen Reduction[J]. Acta Physico-Chimica Sinica, 2017, 33(9): 1838-1845.
[6] YAO Chan, LI Guo-Yan, XU Yan-Hong. Carboxyl-Enriched Conjugated Microporous Polymers: Impact of Building Blocks on Porosity and Gas Adsorption[J]. Acta Physico-Chimica Sinica, 2017, 33(9): 1898-1904.
[7] YANG Yi, LUO Lai-Ming, CHEN Di, LIU Hong-Ming, ZHANG Rong-Hua, DAI Zhong-Xu, ZHOU Xin-Wen. Synthesis and Electrocatalytic Properties of PtPd Nanocatalysts Supported on Graphene for Methanol Oxidation[J]. Acta Physico-Chimica Sinica, 2017, 33(8): 1628-1634.
[8] QIU Jian-Ping, TONG Yi-Wen, ZHAO De-Ming, HE Zhi-Qiao, CHEN Jian-Meng, SONG Shuang. Electrochemical Reduction of CO2 to Methanol at TiO2 Nanotube Electrodes[J]. Acta Physico-Chimica Sinica, 2017, 33(7): 1411-1420.
[9] LIU Jing-Wei, YANG Na-Ting, ZHU Yan. Pd/Co3O4 Nanoparticles Inlaid in Alkaline Al2O3 Nanosheets as an Efficient Catalyst for Catalytic Oxidation of Methane[J]. Acta Physico-Chimica Sinica, 2017, 33(7): 1453-1461.
[10] GU Jin-Yu, QI Peng-Wei, PENG Yang. Progress on the Development of Inorganic Lead-Free Perovskite Solar Cells[J]. Acta Physico-Chimica Sinica, 2017, 33(7): 1379-1389.
[11] LI Ling-Ling, CHEN Ren, DAI Jian, SUN Ye, ZHANG Zuo-Liang, LI Xiao-Liang, NIE Xiao-Wa, SONG Chun-Shan, GUO Xin-Wen. Reaction Mechanism of Benzene Methylation with Methanol over H-ZSM-5 Catalyst[J]. Acta Physico-Chimica Sinica, 2017, 33(4): 769-779.
[12] ZHANG Yan-Tao, LIU Zhen-Jie, WANG Jia-Wei, WANG Liang, PENG Zhang-Quan. Recent Advances in Li Anode for Aprotic Li-O2 Batteries[J]. Acta Physico-Chimica Sinica, 2017, 33(3): 486-499.
[13] LI Gui-Xia, JIANG Yong-Chao, LI Peng, PAN Wei, LI Yong-Ping, LIU Yun-Jie. Helium Separation Performance of the Rhombic-Graphyne Monolayer Membrane: Density Functional Theory Calculations[J]. Acta Physico-Chimica Sinica, 2017, 33(11): 2219-2226.
[14] SHAI Xu-Xia, LI Dan, LIU Shuang-Shuang, LI Hao, WANG Ming-Kui. Advances and Developments in Perovskite Materials for Solar Cell Applications[J]. Acta Physico-Chimica Sinica, 2016, 32(9): 2159-2170.
[15] XIAO Juan, ZHANG Hao-Li. Recent Progress in Organic-Inorganic Hybrid Perovskite Materials for Luminescence Applications[J]. Acta Physico-Chimica Sinica, 2016, 32(8): 1894-1912.