四种生物质热解半焦的FTIR红外分析

FTIR analysis of the char produced by pyrolysis of four kinds of biomass

生物质热解液化是目前生物质能利用的方式之一.为了研究生物质热解过程中各组分的裂解变化规律,利用傅里叶红外光谱仪分别对300℃、400℃、500℃、600℃下制备的玉米秸秆、棉杆、松木屑和稻壳的热解半焦进行了分析.实验结果表明：随着热解温度升高,生物质内部[-OH]、[-CH]、[-CO-]等官能团不断减少,温度在300℃～400℃之间时变化最为剧烈,当温度超过400℃以后,反应逐渐趋于缓和.

Biomass pyrolytic liquefaction technology is one of the main ways of biomass energy utilization.In order to study the pyrolysis mechanism of various components of biomass in the pyrolysis process,fourier transform infrared spectroscopy（FTIR）was used to study the chemical structure of chars obtained from corn straw stalk,cotton stalk,pine sawdust and rice husk in the range from 300℃ to 600 ℃.Experimental results showed that as the temperature increased,functional groups [- OH], [- CH], [- CO- ],etc.reduced sharply between 300℃and 400℃,and then the reactions became slower when temperature was higher than 400 ℃.