A kinetic study on lignite char gasification with CO2 and H2O in a fluidized bed reactor

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dc.contributor.authorTong, Shuai
dc.contributor.authorLi, Lin
dc.contributor.authorDuan, Lunbo
dc.contributor.authorZhao, Changsui
dc.contributor.authorAnthony, Edward J.
dc.date.accessioned2018-11-14T15:54:55Z
dc.date.available2018-11-14T15:54:55Z
dc.date.issued2018-10-25
dc.description.abstractLignite char gasification experiments in CO2, H2O and their mixture were performed in a fluidized bed reactor over the temperatures range of 1060–1210 K. The active sites occupied by different gasifying agents in CO2/H2O mixture were separated and the kinetics was analyzed. Results show that the reactivity of gasification increases rapidly as the temperature rises. The average reaction rate in 50%CO2/50%H2O mixture is slower than the reaction rate in 50%N2/50%H2O atmosphere, which indicates that CO2 and H2O compete for the same active reaction sites on the char surface. Furthermore, with an increase of temperature, the competition capacity of CO2 gasification over H2O gradually increases, as a result, CO2 gasification occupies more active sites than H2O when the temperature is higher than 1160 K. Calculations of the activation energy in the kinetically controlled region based on the shrinking core model reveal that the activation energies follow the trend: N2/CO2 > N2/H2O > CO2/H2O.en_UK
dc.identifier.citationShuai Tong, Lin Li, Lunbo Duan, et al., A kinetic study on lignite char gasification with CO2 and H2O in a fluidized bed reactor. Applied Thermal Engineering, Volume 147, 25 January 2019, Pages 602-609en_UK
dc.identifier.issn1359-4311
dc.identifier.urihttps://doi.org/10.1016/j.applthermaleng.2018.10.113
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13641
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectOxy-fuelen_UK
dc.subjectFluidized beden_UK
dc.subjectGasificationen_UK
dc.subjectActive sitesen_UK
dc.subjectActivation energyen_UK
dc.titleA kinetic study on lignite char gasification with CO2 and H2O in a fluidized bed reactoren_UK
dc.typeArticleen_UK

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