摘要
对稻壳和稻秸进行了机理性热解试验,并采用TG、SEM、EDS和XDR方法研究和分析了半焦的孔隙结构、结渣特性、氯和硫元素迁移和无机化合物晶相等物化特性的变化规律.结果表明:在500～800℃,生物质热解半焦孔隙结构的变化较大.当热解温度为1 000℃时,稻壳半焦的凸面呈现熔融现象,稻秸半焦呈现熔融黏结现象.在800～1 000℃,半焦中剩余的氯和硫大部分会析出;在稻壳和稻秸热解过程中,当终温为1 000℃时,物相发生较大变化并且出现非晶态的无机化合物.
Mechanism-based pyrolysis experiments were carried out on rice husk and straw, during which physicochemical properties of the char were studied using TG, SEM, EDX and XDR, such as the pore structure, slagging characteristics, migration of chlorine and sulfur, and crystalline phase of the inorganic compound, etc. Results show that the pore structure of biomass char changes a lot at 500-800 ℃. When the pyrolysis temperature gets up to 1 000 ℃, the convex side of rice husk char will appear in melting state, while the straw char in melting and bounding condition. Most remaining of chlorine and sulfur will precipitate from the char at 800-1 000 ℃. The phase changes greatly and amorphous inorganic compound appears at a final pyrolysis temperature of 1 000 ℃ in the process of rice husk and straw pyrolysis.
出处
《动力工程学报》
CAS
CSCD
北大核心
2012年第11期865-870,共6页
Journal of Chinese Society of Power Engineering
基金
国家高技术研究发展计划资助项目(863项目)(2009AA05Z310)
中央高校基本科研业务费专项资金资助项目(11QG64)
关键词
生物质
热解温度
焦
熔融
黏结
晶相
biomass
pyrolysis temperature
char
melting
bonding
crystalline phase
