Syngas Production from Coal Gasification with CO2 Rich Gas Mixtures
Coal gasification with CO2 rich gas mixture is one of several promising new technologies associated with CO2 reduction in the atmosphere.Coal gasification with high CO2 concentration is suitable for producing large amount of syngas.However,an increase in CO2 concentration will result in lower gas temperature in the reactor.In this paper,a similar gas temperature profile in CO2/O2 mixtures to that of coal gasification in air is predicted by observing the effects of CO2 concentration.The coal gasification model considered in this calculation is composed of devolatilization model,char gasification model and gas phase reaction model.Reaction rate equation of nth order type with the Random Pore Model is applied to the char gasification reaction.Influence of inlet particles size is also studied.It is found that 20μm particles in 21％O2/79％CO2 and 100μm particles in air (21％ O2/79％N2) result in a similar gas temperature profile during coal gasification.The outlet gas mixture with the same calorific value as from air blown coal gasification can be obtained if air is replaced by 50％CO2/29％N2/21％O2 mixtures
coal gasification syngas CO2
M.S.Alam AT.Wijayanta K.Nakaso J.Fukai
Department of Chemical Engineering,Kyushu University,Fukuoka 819-0395,Japan Research and Education Center of Carbon Resources,Kyushu University,Fukuoka 816-8580,Japan
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
726-729
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）