Steam gasification kinetics of biochar at elevated pressures.

Autor: Schroeder J; Centre of Excellence in Carbon Based Fuels, School of Chemical and Minerals Engineering, North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom, 2520, South Africa., Neomagus HWJP; Centre of Excellence in Carbon Based Fuels, School of Chemical and Minerals Engineering, North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom, 2520, South Africa., Bunt JR; Centre of Excellence in Carbon Based Fuels, School of Chemical and Minerals Engineering, North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom, 2520, South Africa., Everson RC; Centre of Excellence in Carbon Based Fuels, School of Chemical and Minerals Engineering, North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom, 2520, South Africa., Uwaoma RC; Centre of Excellence in Carbon Based Fuels, School of Chemical and Minerals Engineering, North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom, 2520, South Africa.; Pyrometallurgy Division, Mintek, 200 Malibongwe Drive, Randburg, Johannesburg, South Africa.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2024 May 21; Vol. 10 (11), pp. e31172. Date of Electronic Publication: 2024 May 21 (Print Publication: 2024).
DOI: 10.1016/j.heliyon.2024.e31172
Abstrakt: A waste product biomass sample was received and charred to produce the biochar sample. The char reactivity experiments were conducted in a high-pressure fixed bed reactor in the temperature range of 700-730 °C. The steam pressure was varied from 1 to 10 bar steam, and the CO and CO 2 products were measured and used to determine the specific reaction rate of biochar. The results showed that the reaction rate increased with conversion, temperature and steam partial pressure. The increase in steam partial pressure had a significant effect on the reaction rate up to 10 bar steam, where it was observed that the formation of CO 2 contributed more to the specific reaction rate than that of CO and that the selectivity of CO 2 increased over the steam pressure range. The use of these kinetic models also determined the activation energy, and the results were found to be consistent with the literature.
Competing Interests: The authors declare the following financial interests/personal relationships which may be considered as potential competing interestsJane Schroeder reports financial support was provided by Sasol Limited. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(© 2024 The Authors.)
Databáze: MEDLINE
Externí odkaz: