升温速率及水蒸气分压改变对神华煤焦及其显微组分焦气化反应性的影响

Effect of heating rate and steam partial pressure on char gasification reactivity in Shenhua coal char and its maceral concentrates

用非等温热重法考察了神华煤焦及其显微组分富集物焦的水蒸气气化反应,分析了升温速率、水蒸气分压改变对煤焦及其显微组分富集物焦气化反应性的影响。利用最大反应速率和半衰期两种方法评价了所选样品的气化反应性。结果表明:对神华煤而言,在相同的气化反应条件下,当升温速率和水蒸气分压发生改变时,其气化反应性顺序均为,镜质组富集物焦>原煤焦>惰质组富集物焦。

Gasification reactivity of Shenhua coal char and it＇s maceral concentrates was investigated by non-isothermal thermogravimetry. Effect of different heating rates and steam partial pressures on char gasification reactivity was analyzed. Gasification reactivity of samples was estimated based on maximum reaction rate and half-life. Results indicated gasification reactivity order of Shenhua char is vitrinite char 〉 raw char 〉 inertinite char in different heating rate and partial pressure under same gasification process.