OXYGEN-ENRICHED COAL COMBUSTION WITH CARBON DIOXIDE RECYCLE AND RECOVERY: SIMULATION AND EXPERIMENTAL STUDY

Veranth, John M. ; Krishnamoorthy, Gautham

National Energy Technology Laboratory (U.S.)

关键词: Partial Pressure;    Combustion;    Oxides;    Carbon Dioxide;    01 Coal, Lignite, And Peat;   

DOI  :  10.2172/792065
RP-ID  :  FG26-00NT40828--01
RP-ID  :  FG26-00NT40828
RP-ID  :  792065

美国|英语

来源: UNT Digital Library

【 摘 要 】

An accurate estimation of the CO/CO{sub 2} ratio at the surface of an ash inclusion in coal during combustion is necessary to predict the equilibrium partial pressure of volatile reduced metal species inside the burning particle and the rate of vaporization of metal oxides. Assumptions that have been made previously for the CO/CO{sub 2} ratio at the surface of mineral inclusions are compared to those obtained from a steady state detailed kinetics code for a single porous particle (SKIPPY). The detailed kinetic simulations from SKIPPY for varying particle sizes and bulk gas compositions were used to develop algebraic expressions for the CO/CO{sub 2} ratio that can be incorporated into metal vaporization sub-models run as a post processor to detailed furnace simulations.