摘要
采用TG-DSC、XRD、SEM等技术手段对所合成的硅酸锂粉末吸收二氧化碳的性能进行了分析。结果表明,从室温—1000℃—室温的循环过程中,硅酸锂经历了吸收—解吸—吸收二氧化碳的循环。硅酸锂吸收解吸二氧化碳可自发进行,并可循环使用。对硅酸锂吸收解吸二氧化碳过程中的物相分析表明,反应是按照Li4SiO4+CO2Li2SiO3+Li2CO3可逆反应进行的。并测算了实际过程中硅酸锂吸收二氧化碳的速度、吸收量、解吸温度范围等,其中当二氧化碳分压为80%时,700℃时的吸收速率可达3.91%.min-1,吸收量为31%,解吸温度范围为728～1 000℃。
The CO2 sorption property of the synthesized Li4SiO4 was characterised by TG-DSC,XRD and SEM methods.The results indicate that Li4SiO4 undergoes sorption-desorption-sorption cycle during cycling process from room temperature to 1 000℃ followed to room temperature.Li4SiO4 can absorb and desorb CO2 spontaneously,as well as can be used circularly.After careful phase analysis during sorption-desorption process of Li4SiO4,the process can be described as the following reaction formula： Li4SiO4＋CO2Li2SiO3＋Li2CO3.The CO2 sorption rate,sorption amount,as well as desorption temperature range of Li4SiO4 were estimated,which are 3.91 wt.%·min-1,31% and 728~1 000℃ respectively,at the CO2 partial pressure of 80% and the temperature of 700℃.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2011年第6期413-418,共6页
Powder Metallurgy Technology
基金
留学回国人员项目
内蒙古自然科学基金项目(2009BS0802
2010BS0604)
关键词
硅酸锂粉末
高温二氧化碳吸收材料
吸收性能
lithium orthosilicate powder
absorbents of CO2 at high temperature
sorption property
