Research on Alkali-catalysed CO2-Gasification of Coal Black Liquor Slurry Char and Coal Water Slurry Char

The gasification and combustion of coal black liquor slurry(CBLS)is a new coal cleam utilization technology,which has been developed based on the coal water syurry(CWS)technology.Alkali-catalysed gasification experiment of CBLS char and CWS char are studied,we have obtained carbon conversion datas by temperature-programmed thermo-gravimetry and isothermal technique.It shown that the gasification of CBLS char was catalyzed by sodium and its compounds,and also the organic matter composition of CBLS char played a key role in the gasification.The carbon conversion of CBLS char was 98.37%,which was 5.1% higher than that of Coal water slurry char.The optimal gasification temperature for two chars was 1200℃,in which the carbon conversion were higher than other temperatures.The appropriate loading saturation level(LSL)of alkali-catalyzer was 10%.