掺混生物质炭对煤气化反应特性的影响

Research on Co-gasification Characteristics of Biomass Char and Coal

采用非等温热重分析法研究了掺混生物质炭对煤气化反应特性的影响.结果表明:无论是松木炭还是稻草炭的加入,XQ煤气化时DTG峰值对应温度和气化结束温度均随着生物质炭掺混比例的增大逐渐向低温区移动;生物质炭对SH煤气化效率的影响不大,可以部分代替优质煤种,减少能源投入和CO2排放量;稻草炭相对松木炭更有利于XQ煤气化反应的进行,稻草炭使XQ煤具有更低的表观活化能和更高的频率因子,并使XQ煤孔隙分布更加明显.

Co-gasification characteristics of biomass char and coal were studied by non-isothermal thermogravimetric analysis. Results show that no matter pine char or straw char is added, both the DTG peak temperature and the end temperature of XQ coal gradually shift to the low temperature area with the rise of blending ratio of the biomass char. The addition of biomass char hardly affects the gasification efficiency of SH coal, which therefore can partially replace the high quality coal, so as to reduce the energy consumption and CO2 emission. Straw char is more helpful to XQ coal gasification in comparison with pine char, as it enables XQ coal to have a lower reaction activation energy, higher frequency factor and more apparent pore distribution.