摘要
活性矾土、二氧化硅、硅藻土及煤灰对高温烟气中碱金属的脱除都有一定的效果。通过模拟高温烟气下的热重实验 ,研究了温度对这些吸收剂脱除碱金属的影响 ,并从化学热力学的角度对实验结果进行了分析。结论为 4种吸收剂对碱金属的脱除都有一定的效果 ,但活性矾土和二氧化硅在实验条件下脱除碱金属效果更明显。计算结果表明 。
Active bauxite, silicon dioxide, diatomaceous earth and ash have been found suitable for alkali removal from hot flue gas in a coal conversion system. The effect of temperature on the alkali adsorption/reaction using these sorbents was surveyed in the experiments in which a thermogravimetric analyzer was utilized under a simulated flue gas condition. Equilibrium calculations were also carried out to determine the mechanism of reaction. The results reveal that although all these sorbents are available for the alkali removal, the active bauxite and silicon dioxide are more effective, and the calculations suggest that a higher temperature can take more advantage to the alkali removal.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2001年第1期48-51,共4页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目! ( 5 96 0 6 0 0 8)
国家重点基础研究专项经费资助项目! ( G19990 2 2 2 0 9)
关键词
碱金属
脱除
固体吸收剂
煤
废气
Alkali metal compounds
Coal
Flue gases
Silica
Thermogravimetric analysis
