Complete analytical model for the combustion of a single porous char particle incorporated in an AFBC system model

G. Brem*, J. J.H. Brouwers

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

5 Citations (Scopus)

Abstract

The model deals with heterogeneous reaction rates which are of general order with respect to carbon and oxygen, effective pore diffusion which varies with solid conversion and external gas film transport. Batch-wise experiments, performed in a 100-mm diameter fluidized bed with different sized char particles, show a good agreement between measured burn-out times and model results. The single particle model has been incorporated in a system model of a coal fired atmospheric fluidized bed combustion (AFBC). In the AFBC system model all the major processes involving the combustion of the coal are taken into account: fluid hydrodynamics of the bed, devolatilization and fragmentation of the coal, combustion of the volatiles, combustion of the char, attrition and elutriation, homogeneous gas phase reactions, nitrogen oxide formation and reduction, sulfur capture, heat transfer, freeboard reactions, supply of secondary air and recycling of ash.

Original languageEnglish
Title of host publicationProceedings of the 1989 International Conference on Fluidized Bed Combustion
Subtitle of host publicationFBC-technology for today
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages37-47
Number of pages11
ISBN (Print)0791803082
Publication statusPublished - 1 Dec 1989
Externally publishedYes
EventInternational Conference on Fluidized Bed Combustion, FBC 1989: Technology for Today - San Francisco, United States
Duration: 30 Apr 19893 May 1989

Conference

ConferenceInternational Conference on Fluidized Bed Combustion, FBC 1989
Abbreviated titleFBC
CountryUnited States
CitySan Francisco
Period30/04/893/05/89

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