摘要
根据我国和美国国家标准,将稻草、松木屑和梧桐树叶3种生物质分别在815和600℃下制灰,此外也在500℃下制灰进行比较。测定了灰分量和灰成分,考察了灰成分中氧化物的含量变化以及生物质灰的积灰、结渣特性;利用X射线衍射方法和SEM对不同温度灰的物相和灰形态进行了分析;利用灰熔点仪测定了生物质灰的灰熔点。研究表明:灰分量、灰成分、物相变化、灰形态以及灰熔点均与灰化温度密切相关,600℃的灰化温度比较适合研究生物质灰分的性质。
There are no specific standards for biomass ash analysis in China. The standards for coal ash analysis are usually used to determine the property of hiomass ash. Three kind of biomass including rice straw, pine sawdust and Wutong leaf were burned at 815℃, 600℃ and 500℃, respectively. Corresponding to the temperature required in the standard of GB and ASTM. The ash content and composition were analyzed. Based on the ash composition resuhs, the volatilization of alkali oxides in biomass ash, deposition and sintering problems related to biomass thermochemical conversion were analyzed. Their phase composition and morphology were investigated by XRD and SEM. Ash fusion temperature was measured by 5E-AF II Smart Ash Fusion Analyzer. The results indicated that the ash content, composition, phase composition, morphology and ash fusion temperature are closely related to ashing temperature. So it is suited to use 600℃ ashing temperature for an exact determination of ash property.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2011年第3期364-369,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(20876048)
教育部"长江学者与创新团队发展计划"(PCSIRT-IRT0620)
关键词
生物质灰
灰化温度
灰分特性
灰熔点
biomass ash
ashing temperature
ash characteristics
ash fusion temperature
