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Multi-fluid modelling of the desulphurisation process within a bubbling fluidised bed coal gasifier

Multi-fluid modelling of the desulphurisation process within a bubbling fluidised bed coal gasifier
Multi-fluid modelling of the desulphurisation process within a bubbling fluidised bed coal gasifier
The present work introduces the desulphurisation process to a two- and three-dimensional Eulerian-Eulerian CFD model of a coal bubbling fluidised gasifier. The desulphurisation process is important for the reduction of harmful SOx emissions, therefore the development of a CFD model capable of predicting chemical reactions involving desulphurisation is key to the optimisation of reactor designs and operating conditions. To model the process, one gaseous phase and five particulate phases are included. Devolatilisation, heterogeneous and homogeneous chemical reactions as well as calcination and desulphurisation reactions are incorporated. A calcination-only model and a calcination plus desulphurisation model are simulated in two and three dimensions and the concentrations of SO2 leaving the reactors are compared. The simulated results are assessed against available published experimental data. The influence of the fluidised bed on the desulphurisation is also considered.
0001-1541
1952-1963
Armstrong, Lindsay-Marie
db493663-2457-4f84-9646-15538c653998
Gu, S.
a6f7af91-4731-46fe-ac4d-3081890ab704
Luo, K.H.
1c9be6c6-e956-4b12-af13-32ea855c69f3
Armstrong, Lindsay-Marie
db493663-2457-4f84-9646-15538c653998
Gu, S.
a6f7af91-4731-46fe-ac4d-3081890ab704
Luo, K.H.
1c9be6c6-e956-4b12-af13-32ea855c69f3

Armstrong, Lindsay-Marie, Gu, S. and Luo, K.H. (2012) Multi-fluid modelling of the desulphurisation process within a bubbling fluidised bed coal gasifier. AIChE Journal, 59, 1952-1963.

Record type: Article

Abstract

The present work introduces the desulphurisation process to a two- and three-dimensional Eulerian-Eulerian CFD model of a coal bubbling fluidised gasifier. The desulphurisation process is important for the reduction of harmful SOx emissions, therefore the development of a CFD model capable of predicting chemical reactions involving desulphurisation is key to the optimisation of reactor designs and operating conditions. To model the process, one gaseous phase and five particulate phases are included. Devolatilisation, heterogeneous and homogeneous chemical reactions as well as calcination and desulphurisation reactions are incorporated. A calcination-only model and a calcination plus desulphurisation model are simulated in two and three dimensions and the concentrations of SO2 leaving the reactors are compared. The simulated results are assessed against available published experimental data. The influence of the fluidised bed on the desulphurisation is also considered.

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Published date: December 2012
Organisations: Engineering Science Unit

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Local EPrints ID: 346956
URI: https://eprints.soton.ac.uk/id/eprint/346956
ISSN: 0001-1541
PURE UUID: aafab192-7502-499a-9fa0-a7ca27f54fa5

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Date deposited: 17 Jan 2013 14:27
Last modified: 18 Jul 2017 05:00

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