The carbon dioxide gasification characteristics of biomass char samples and their effect on coal gasification reactivity during co-gasification.

Autor: Mafu LD; Chemical Resource Beneficiation (CRB), School of Physical and Chemical Sciences, North-West University, Potchefstroom Campus, Private Bag X6001 Potchefstroom 2520, South Africa., Neomagus HWJP; Chemical Resource Beneficiation (CRB), School of Physical and Chemical Sciences, North-West University, Potchefstroom Campus, Private Bag X6001 Potchefstroom 2520, South Africa; School of Chemical and Minerals Engineering, Private Bag X6001, North-West University, Potchefstroom Campus, Potchefstroom 2520, South Africa. Electronic address: hein.neomagus@nwu.ac.za., Everson RC; Chemical Resource Beneficiation (CRB), School of Physical and Chemical Sciences, North-West University, Potchefstroom Campus, Private Bag X6001 Potchefstroom 2520, South Africa; School of Chemical and Minerals Engineering, Private Bag X6001, North-West University, Potchefstroom Campus, Potchefstroom 2520, South Africa., Okolo GN; School of Chemical and Minerals Engineering, Private Bag X6001, North-West University, Potchefstroom Campus, Potchefstroom 2520, South Africa., Strydom CA; Chemical Resource Beneficiation (CRB), School of Physical and Chemical Sciences, North-West University, Potchefstroom Campus, Private Bag X6001 Potchefstroom 2520, South Africa., Bunt JR; School of Chemical and Minerals Engineering, Private Bag X6001, North-West University, Potchefstroom Campus, Potchefstroom 2520, South Africa.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2018 Jun; Vol. 258, pp. 70-78. Date of Electronic Publication: 2017 Dec 18.
DOI: 10.1016/j.biortech.2017.12.053
Abstrakt: The carbon dioxide gasification characteristics of three biomass char samples and bituminous coal char were investigated in a thermogravimetric analyser in the temperature range of 850-950 °C. Char SB exhibited higher reactivities (R i , R s , R f ) than chars SW and HW. Coal char gasification reactivities were observed to be lower than those of the three biomass chars. Correlations between the char reactivities and char characteristics were highlighted. The addition of 10% biomass had no significant impact on the coal char gasification reactivity. However, 20 and 30% biomass additions resulted in increased coal char gasification rate. During co-gasification, chars HW and SW caused increased coal char gasification reactivity at lower conversions, while char SB resulted in increased gasification rates throughout the entire conversion range. Experimental data from biomass char gasification and biomass-coal char co-gasification were well described by the MRPM, while coal char gasification was better described by the RPM.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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