Preliminary Experimental Studies of Waste Coal Gasification
Coal mining is one of Australias most important industries.It was estimated that coal washery rejects from black coal mining was approximately 1.82 billion tonnes from 1960-2009 in Australia,and is projected to produce another 1 billion tonnes by 2018 at the current production rate.To ensure sustainability of the Australian coal industry,we have explored a new potential pathway to create value from the coal waste through production of liquid fuels or power generation using produced syngas from waste coal gasification.Consequently,environmental and community impacts of the solid waste could be minimized.However,the development of an effective waste coal gasification process is a key to the new pathway.An Australian mine site with a large reserve of waste coal was selected for the study,where raw waste coal samples including coarse rejects and tailings were collected.After investigating the initial raw waste coal samples,float/sink testing was conducted to achieve a desired ash target for laboratory-scale steam gasification testing and performance evaluation.The preliminary gasification test results show that carbon conversions of waste coal gradually increase as the reaction proceeds,which indicates that waste coal can be gasified by a steam gasification process.However,the carbon conversion rates are relatively low,only reaching to 20-30％.Furthermore,the reactivity of waste coal samples with a variety of ash contents under N2/air atmosphere have been studied by a homemade thermogravimetric analysis (TGA) apparatus that can make the sample reach the reaction temperature instantly.
waste coal utilisation gasification synthetic liquid fuels
S.Su Y.G.Jin X.X.Yu R.Worrall
Advanced Coal Technology,CSIRO,Queensland 4069,Australia
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
488-490
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）