In-situ upgrading of Napier grass pyrolysis vapour over microporous and hierarchical mesoporous zeolites

MOHAMMED1, Isah Yakub, ABAKR, Yousif Abdalla and KABIR KAZI, Feroz (2017). In-situ upgrading of Napier grass pyrolysis vapour over microporous and hierarchical mesoporous zeolites. Waste and Biomass Valorization. (In Press)

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Official URL: http://link.springer.com/article/10.1007%2Fs12649-...
Link to published version:: 10.1007/s12649-017-9925-x

Abstract

This study presents in-situ upgrading of pyrolysis vapour derived from Napier grass over microporous and mesoporous ZSM-5 catalysts. It evaluates effect of process variables such catalyst–biomass ratio and catalyst type in a vertical fixed bed pyrolysis system at 600 °C, 50 °C/min under 5 L/min nitrogen flow. Increasing catalyst–biomass ratio during the catalytic process with microporous structure reduced production of organic phase bio-oil by approximately 7.0 wt%. Using mesoporous catalyst promoted nearly 4.0 wt% higher organic yield relative to microporous catalyst, which translate to only about 3.0 wt% reduction in organic phase compared to the yield of organic phase from non-catalytic process. GC–MS analysis of bio-oil organic phase revealed maximum degree of deoxygenation of about 36.9% with microporous catalyst compared to the mesoporous catalysts, which had between 39 and 43%. Mesoporous catalysts promoted production olefins and alkanes, normal phenol, monoaromatic hydrocarbons while microporous catalyst favoured the production of alkenes and polyaromatic hydrocarbons. There was no significant increase in the production of normal phenols over microporous catalyst due to its inability to transform the methoxyphenols and methoxy aromatics. This study demonstrated that upgrading of Napier grass pyrolysis vapour over mesoporous ZSM-5 produced bio-oil with improved physicochemical properties.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Polymers Nanocomposites and Modelling Research Centre
Departments: Arts, Computing, Engineering and Sciences > Engineering and Mathematics
Identification Number: 10.1007/s12649-017-9925-x
Depositing User: Feroz Kabir
Date Deposited: 20 Apr 2017 16:10
Last Modified: 22 Nov 2017 20:26
URI: http://shura.shu.ac.uk/id/eprint/15575

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