摘要
为了研究煤焦与流化床气化带出细粉的CO_2气化特性,采用热重分析仪考察了不同气化温度和CO_2分压对神木煤焦与细粉气化行为的影响。结果表明,固定CO_2分压提高气化温度或固定气化温度提高CO_2分压都能加快神木煤焦和细粉气化反应的进行,缩短达到一定碳转化率所需时间;神木煤焦和细粉的反应速率随碳转化率的增大均先快速增大到最大值,而后缓慢降低;神木煤焦和细粉的CO_2气化反应活化能均随碳转化率的升高而增大,在相同的碳转化率下,神木煤细粉的反应活化能大于神木煤焦。与神木煤焦相比,神木煤细粉的CO_2气化反应活性较低。
To investigate the CO2 gasification properties of coal chars and fine chars from fluidized bed gasification,the influences of gasification temperature and CO2 partial pressure on Shenmu coal chars and fine chars were analyzed by thermogravimetric analyzer.The results show that increase in gasification temperature with constant CO2 partial pressure or increase in CO2 partial pressure with constant temperature could all accelerate the gasification reaction,thus shortenes the required reaction time of a certain conversion rate.With increasing carbon conversion rate,the carbon reaction rates of Shenmu coal chars and fine chars increase quickly and then decrease slowly after reaching the maximum value.The gasification reaction activation energy of Shenmu coal chars and fine chars with CO2 are all increased with increasing carbon conversion rate,the reaction activation energy of fine chars is higher than that of coal chars at the same carbon conversion rate.Shenmu coal char has higher CO2 reactivity than Shenmu fine chars.
作者
樊红莉
李风海
黄戒介
FAN Hongli;LI Fenghai;HUANG Jiejie(School of Chemistry and Chemical Engineering,Heze University,Heze 274000 China;Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China)
出处
《洁净煤技术》
CAS
2019年第1期98-102,共5页
Clean Coal Technology
基金
国家自然科学基金资助项目(21875059)
山东省自然科学基金资助项目(ZR2018MB037)
关键词
煤焦
细粉
CO2气化
等温气化
气化活性
coal chars
fine chars
CO2 gasification
isothermal gasification
gasification reactivity
