Characterization and Activity of Cr, Cu and Ga Modified ZSM-5 for Direct Conversion of Methane to Liquid Hydrocarbons

作     者：Nor Aishah Saidina Amin Didi Dwi Anggoro 

作者机构：Faculty of Chemical and Natural Resources Engineering Universiti Teknologi Malaysia 81130 Skudai Johor MalaysiaFaculty of Chemical and Natural Resources Engineering Universiti Teknologi Malaysia 81130 Skudai Johor Malaysia 2 Department of Chemical Engineering University of Diponegoro 23589 Semarang Indonesia 

出 版 物：《Journal of Natural Gas Chemistry》 (天然气化学杂志（英文版）)

年 卷 期：2003年第12卷第2期

页      面：123-134页

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 

基　　金：One of the authors (D.D.A) gratefully acknowledges the financial support received in the form of a research grant(02-02-06-0101 09-02-06-0057-SR005/09-07) 

主　　题：characterization activity modified ZSM-5 methane direct conversion liquid hydrocarbons 

摘      要：Direct conversion of methane using a metal-loaded ZSM-5 zeolite prepared viaacidic ion exchange was investigated to elucidate the roles of metal and acidity in the formation ofliquid hydrocarbons. ZSM-5 (SiO_2/Al_2O_3=30) was loaded with different metals (Cr, Cu and Ga)according to the acidic ion-exchange method to produce metal-loaded ZSM-5 zeolite catalysts. XRD,NMR, FT-IR and N_2 adsorption analyses indicated that Cr and Ga species managed to occupy thealuminum positions in the ZSM-5 framework. In addition, Cr species were deposited in the pores ofthe structure. However, Cu oxides were deposited on the surface and in the mesopores of the ZSM-5zeolite. An acidity study using TPD-NH_3, FT-IR, and IR-pyridine analyses revealed that the totalnumber of acid sites and the strengths of the Broensted and Lewis acid sites were significantlydifferent after the acidic ion exchange treatment. Cu loaded HZSM-5 is a potential catalyst fordirect conversion of methane to liquid hydrocarbons. The successful production of gasoline via thedirect conversion of methane depends on the amount of aluminum in the zeolite framework and thestrength of the Broensted acid sites.