Steam-assisted methanol conversion to green fuel over highly efficient hierarchical structured MFI/BEA composite zeolite synthesized by incorporation method

Faezeh Mirshafiee, Reza Khoshbin and Ramin Karimzadeh

Renewable Energy, 2022, vol. 197, issue C, 1061-1068

Abstract: In this study, we have investigated the effect of water co-feeds on products distribution and coking behavior of a new composite catalyst in the MTG process. A novel ZSM-5/Beta bi-phase composite catalysts were synthesized via a hydrothermal crystallization method. Catalysts were all characterized by considering their crystallinity (XRD analysis), morphology (FE-SEM analysis), surface area, pore volume (N2 adsorption/desorption technique), and acidity (NH3-TPD analysis). The catalytic performance of the synthesized catalysts was tested by the MTG reaction in WHSV of 20 h−1, the temperature of 400 °C, atmospheric pressure, and water content of 0, 10, and 20%. Over the ZSM-5/Beta composite catalyst, the methanol diluted with 10% water resulted in a 29% yield of gasoline compared with 21% over ZSM-5 and 66% selectivity to alkylated aromatics compared with 45% over ZSM-5. Adding water to the methanol had a key role in improving catalysts lifetime so that by using the feed with 10 wt% water, a lifetime about two times longer than pure methanol was observed. The higher activity over the ZSM-5/Beta sample co-feed with 10% water, was ascribed to overcoming the diffusion limitations and retarding catalyst deactivation in the presence of water.

Keywords: Composite catalyst; ZSM-5/Beta; MTG; Water co feeds; Coke deposition (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:197:y:2022:i:c:p:1061-1068

DOI: 10.1016/j.renene.2022.08.041

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