Optimization of direct conversion of methane to liquid fuels over Cu loaded W/ZSM-5 catalyst

The optimization of methane conversion to liquid fuels over copper loaded W/ZSM-5 catalyst was studied by utilizing experimental design from ‘Statsoft Statistica’ version 6.0 software. Response surface methodology was employed to determine the optimum methane conversion and C5 selectivity. Numerical results indicated the optimum methane conversion of 29.4% with the corresponding C5 selectivity of 57.2% were achieved at 12.3 vol% of O2, 203.9 ml/min of total feed flow rate, and %W doped of 3.2 wt%. The optimum C5 selectivity of 70.2% was attained at 7.6 vol% of O2, 208.9 ml/min of total feed flow rate, and 3.2 wt% of W content with the corresponding methane conversion of 26.7%. By means of variance analysis and additional experiments, the adequacy of this model is confirmed. q 2004 Elsevier Ltd. All rights reserved.

[1]  Ariane Leites Larentis,et al.  Modeling and optimization of the combined carbon dioxide reforming and partial oxidation of natural gas , 2001 .

[2]  Zhi-Tao Xiong,et al.  Study of W/HZSM-5-Based Catalysts for Dehydro-aromatization of CH4 in Absence of O2. II. Action of Promoters Zn and Li , 2001 .

[3]  A. Sayari,et al.  Non-oxidative dehydroaromatization of methane over Ga-promoted Mo/HZSM-5-based catalysts , 2001 .

[4]  Deuk Ki Lee,et al.  Optimization of pyrolytic coprocessing of waste plastics and waste motor oil into fuel oils using statistical pentagonal experimental design , 1999 .

[5]  J. Lunsford,et al.  Steady-state conversion of methane to C4+ aliphatic products in high yields using an integrated recycle reactor system , 2000 .

[6]  D. Walsh,et al.  Direct partial oxidation of methane over ZSM-5 catalyst : metals effects on higher hydrocarbon formation , 1994 .

[7]  J. S. Hunter,et al.  Statistics for experimenters : an introduction to design, data analysis, and model building , 1979 .

[8]  D. Anggoro,et al.  Characterization and Activity of Cr, Cu and Ga Modified ZSM-5 for Direct Conversion of Methane to Liquid Hydrocarbons , 2003 .

[9]  S. Rezzoug,et al.  Assessment of wood liquefaction in acidified ethylene glycol using experimental design methodology , 2003 .

[10]  Yide Xu,et al.  Recent advances in methane dehydro-aromatization over transition metal ion-modified zeolite catalysts under non-oxidative conditions , 1999 .

[11]  B. Weckhuysen,et al.  Conversion of methane to benzene over transition metal ion ZSM-5 zeolites : I. Catalytic characterization , 1998 .

[12]  P. Mériaudeau,et al.  Methane aromatization over Mo/H-ZSM-5: on the reaction pathway , 2000 .

[13]  F. Solymosi,et al.  Selective oxidation of methane to benzene over K2MoO4/ZSM-5 catalysts , 1996 .

[14]  P. Mériaudeau,et al.  Aromatization of methane over zeolite supported molybdenum: active sites and reaction mechanism , 2002 .

[15]  A. Oszkó,et al.  Aromatization of Methane over Supported and Unsupported Mo-Based Catalysts , 1997 .

[16]  M. Proštenik,et al.  Determination of catalytic reformed gasoline octane number by high resolution gas chromatography , 1990 .

[17]  J. Pinto,et al.  Preparation of high loading silica supported nickel catalyst: simultaneous analysis of the precipitation and aging steps , 1999 .

[18]  Zhi-Tao Xiong,et al.  Study of W/HZSM-5-Based Catalysts for Dehydro-aromatization of CH4 in Absence of O2. I. Performance of Catalysts , 2001 .

[19]  Don Edwards,et al.  How to Apply Response Surface Methodology , 1991 .

[20]  O. Anunziata,et al.  Methane direct conversion to aromatic hydrocarbons at low reaction temperature , 1997 .

[21]  Tao Zhang,et al.  Methane aromatization in the absence of an added oxidant and the bench scale reaction test , 1999 .

[22]  W. D. Bostick,et al.  Optimization of a kinetic method by response-surface methodology and centrifugal analysis and application to the enzymic measurement of ethanol , 1981 .

[23]  Q. Kan,et al.  The function of Cu(II) ions in the Mo/CuH-ZSM-5 catalyst for methane conversion under non-oxidative condition , 1999 .

[24]  Linsheng Wang,et al.  Methane dehydrogenation and aromatization in the absence of oxygen on MoHZSM-5: A study on the interaction between Mo species and HZSM-5 by using 27Al and 29Si MAS NMR , 1997 .

[25]  Anthony B. Atkinson,et al.  How to Apply Response Surface Methodology , 1993 .

[26]  W. Cui,et al.  Activity and stability enhancement of MoHZSM-5-based catalysts for methane non-oxidative transformation to aromatics and C2 hydrocarbons: Effect of additives and pretreatment conditions , 1997 .