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Fluidised bed oxy-fuel gasification of coal: Interactions between volatiles and char at varying pressures and fuel feed rates

Xiangyi Long - Nicolas Spiegl - Millan, Marcos

Fluidised bed gasification is a versatile technology in terms of load flexibility and ability to process various fuels. However, fluidised bed gasification processes are usually air-blown, making integration with CO2 capture difficult and expensive. Operation of a fluidised bed gasifier with O2/recycled CO2 mixtures has been proposed as a route to overcome this drawback. In this work, the effect of pressure and fuel feed rate on the extent of gasification of German lignite in a CO2 rich atmosphere has been examined in a fluidised bed reactor (FBR). A 19% decrease in carbon conversion with increasing pressure from 5 to 20 bara was observed. The higher fuel feeding rates needed to maintain the gasification agent to coal ratio in the FBR at high pressures produces a larger concentration of tars in the reactor, which seems to cause deposition, by intra and inter particle reaction, on the char and reduces its reactivity.

Elsevier Ltd.
eng

Bibliography


Title:Fluidised bed oxy-fuel gasification of coal: Interactions between volatiles and char at varying pressures and fuel feed rates
Material Type:EA, Electronic Article
Author: Xiangyi Long(Author) - Nicolas Spiegl(Author) - Millan, Marcos(Author)
Publisher:Elsevier Ltd.
Palce of Publication:Amsterdam, Netherland
Publication Date:2020
Pagination:11 pages
Source:Chemical Engineering Science: X, Volume 8, November 2020, 100068
ISBN (or other code):
Languages:eng
Keywords: Coal gasification; Wire-mesh reactor; Fluidised bed reactor; Carbon capture
Edition statement:
File Size: 1.62 MB

Fluidised bed oxy-fuel gasification of coal: Interactions between volatiles and char at varying pressures and fuel feed rates

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