Yield of Gasoline-Range Hydrocarbons As a Function of Uniform ZSM-5 Crystal Size
Uniform ZSM-5 nanocrystals were synthesized by a single-templating procedure. The samples were then characterized by a variety of physical techniques such as XRD, SEM, BET, ICP and TPD. The dehydration of methanol over synthesized ZSM-5 zeolite was studied in a fixed-bed continuous flow reactor at 370°C and WHSV of 2.6 gg-1 h under ambient pressure. The effect of crystal size of zeolite catalysts on product distribution in methanol dehydration reaction was investigated. Good correlation was observed between catalytic performance, product distribution and size of ZSM-5 crystals. It was found that the decrease in crystal size significantly influences light olefins (ethylene and propylene) and paraffins (C1-C₄) selectivity in methanol dehydration reaction. Furthermore, nanocrystal ZSM-5 showed long-term catalytic stability compared with conventional ZSM-5 provided that the reaction activity is strongly dependent on the crystal size in methanol dehydration process. The results indicated that crystal size significantly affects the catalyst lifetime and hydrocarbon distributions in product stream. Based on the obtained results, it is concluded that the use of uniform ZSM-5 nanocrystals improves the yield of propylene and alkyl aromatics in methanol conversion reaction at mild conditions.
A. A. Rownaghi et al., "Yield of Gasoline-Range Hydrocarbons As a Function of Uniform ZSM-5 Crystal Size," Catalysis Communications, vol. 14, no. 1, pp. 37 - 41, Elsevier, Oct 2011.
The definitive version is available at https://doi.org/10.1016/j.catcom.2011.07.015
Chemical and Biochemical Engineering
Keywords and Phrases
Alkyl Aromatics; Crystal Size; Methanol Dehydration; Renewable Fuels; ZSM-5 Nanocrystals; Catalysts; Dehydration; Dewatering; Ethylene; Methanol; Methanol Fuels; Nanocrystals; Organic Compounds; Paraffins; Propylene; Grain Size and Shape
International Standard Serial Number (ISSN)
Article - Journal
© 2011 Elsevier, All rights reserved.
01 Oct 2011