摘要
用 5种高硫强粘结性煤与 2种生物质在 1kg h回转炉内共热解 ,对产品产率、煤与生物质中硫和氮的热解脱除、焦炭的光学组织进行了研究。结果表明 ,初次焦油的生成率和二次裂解率随热解温度的变化可分别用正态分布函数和韦布尔分布函数模拟 ;生物质可阻止强粘结性煤热解过程中颗粒之间的粘结 ,得到粒状焦炭 ;生物质热解生成较多的H2 ,有利于煤中硫和氮的脱除 ;随着温度的升高、煤粒度的减小和煤变质程度的降低 ,热解脱硫和脱氮率增大 ;煤热解产生的中间相与生物质之间的物理化学作用阻碍光学各向异性组织的形成和发展。
WT4”BZ]Five coal samples of high sulfur content and strongly caking property and two biomass samples were subject to co-pyrolysis in a rotary furnace with a capacity of 1kg/h Product yields, removal of sulfur and nitrogen from the coal and the biomass, and optical textures of the char were studied The results show that the probability of tar formation can be simulated by normal distribution function, while that of tar decomposition by Weibull distribution function Biomass prevents coal particles from caking together during pyrolysis, and therefore particulate char can be obtained The biomass produces more hydrogen than the coal during pyrolysis, and consequently promotes the removal of sulfur and nitrogen from the coal The effectiveness of pyrolysis in the removal of sulfur and nitrogen increases with the increase of temperature, the decrease of the degree of coal metamorphosis and the size of coal particle The reaction between biomass char and the mesophase from the pyrolysis of caking coal obstructs the formation and development of anisotropic textures [WT4”HZ]
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2000年第4期294-297,共4页
Journal of Fuel Chemistry and Technology
基金
山东省自然科学基金!资助项目 (Q98B0 61 2 2 )
原煤炭部科技项目! (97- 349)
关键词
高硫煤
粘结性煤
生物进
共热解
回转炉
high sulfur coal, caking coal, biomass, co-pyrolysis, rotary furnace
