摘要
采用稻杆、稻壳和木屑作为原料,对生物质材料热解产生的煤气中的焦油含量进行了系统研究.采用冷态捕集方法进行焦油取样;焦油样品用重度分析方法确定煤气中焦油含量.结果表明,由于各种生物质原料的组成及结构不同,热解煤气中,焦油含量存在较大差异.热解温度由550℃升高到900℃以上,热解煤气中焦油含量迅速下降,下降幅度甚至达到7000.随生物质原料在热解反应器内滞留时间的延长,焦油含量也下降.同时给出并分析了焦油含量随热解温度和滞留时间变化的情况.
The effect of different factors in the pyrolysis process of biomass materials on the tar content in the product gas was investigated. Rice straw, rice husk and wood chips were adopted as the feedstock for the pyrolysis process. Cold trapping method was adopted for the sampling of tar and tar content in the gas which was achieved from gravimetric analysis of the tar sample. The test scheme of tar sampling and quantitative analysis of tar in the gas is proved to be of high veracity and stability. The tar content in the pyrolysis gas varies with the type of biomass feedstock. Tar content in the gas decreases quickly with the increase of pyrolysis temperature from 550 ℃ to 900 ℃ and above, even by 70% sometimes. With the increase of the residence time of feedstock in the pyrolysis equipment, tar content in the gas decreases. The decrease profile of tar content with pyrolysis temperature and residence time was provided together with the attempt to explain the phenomena in a reasonable way.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2003年第4期329-334,共6页
Journal of Combustion Science and Technology
基金
浙江省院士基金资助项目(2002300501).
