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Numerical simulations on the effect of potassium on the biomass fast pyrolysis in fluidized bed reactor

Eri, Q, Zhao, X, Ranganathan, P and Gu, Sai (2017) Numerical simulations on the effect of potassium on the biomass fast pyrolysis in fluidized bed reactor Fuel, 197. pp. 290-297.

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Abstract

In this study, the effect of potassium on the cellulose fast pyrolysis in fluidized bed reactor has been studied using Computational Fluid Dynamics (CFD). A multiphase pyrolysis model of cellulose has been implemented by integrating the hydrodynamics of the fluidized bed with an adjusted cellulose pyrolysis mechanism that accounts the effect of potassium. The model has been validated with the reported experimental data. The simulation results show that potassium concentration and reactor temperature have a significant effect on the yields and components of cellulose pyrolysis products. The product yields fluctuate is caused by the unstable flow in the fluidized bed. The result shows that the increased potassium concentration in the cellulose causes a significant increase of the gas and char yields and reduction in the bio-oil. Also, the dramatic composition variations in bio-oil and gas were observed due to the inhibition of fragmentation, and the depolymerization reaction of activated cellulose, and the catalysis of the depolymerization reaction of cellulose. It is also found that the increase in reactor temperature greatly enhances the endothermic pyrolysis reaction, which leads to the significant changes in the yield and composition of cellulose pyrolysis products.

Item Type: Article
Subjects : Chemical & Process Engineering
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Eri, QUNSPECIFIEDUNSPECIFIED
Zhao, XUNSPECIFIEDUNSPECIFIED
Ranganathan, PUNSPECIFIEDUNSPECIFIED
Gu, Saisai.gu@surrey.ac.ukUNSPECIFIED
Date : 23 February 2017
Identification Number : 10.1016/j.fuel.2017.01.109
Copyright Disclaimer : © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Biomass fast pyrolysis, Potassium, Fluidized bed, Multi-fluid model
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 03 Feb 2017 15:42
Last Modified : 07 Jul 2017 09:03
URI: http://epubs.surrey.ac.uk/id/eprint/813453

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