反应温度对石灰石循环煅烧/碳酸化分离CO_2的影响

Influence of Reaction Temperature on Limestone Cyclic Calcination /Carbonation for CO_2 Separation

采用可以实现恒温过程的自制热重分析装置,在每次循环过程中,不固定反应时间,根据化学反应进程决定停留时间,在排除反应时间的干扰前提下,研究了反应温度对石灰石循环煅烧/碳酸化高温分离CO2的特性。结果表明,实验范围内煅烧温度在900℃与950℃下碳酸化转化率相差不多,而1 000℃时,吸收剂活性明显下降。碳酸化温度700℃时转化率最高。

An isothermal method thermogravimetric analysis was applied to investigate the influence of reaction temperature on the limestone sorbent calcination/ carbonation cyclic In each cycle process, reaction time was not subjective decided but decided by the chemical reaction process. Thus can be exclude of the influence of reaction time on the chemical reaction. Results show that in the experimental range, calcination temperature at 900 ℃ and 950 ℃ carbonation conversion is almost the same, but at 1 000 ℃, the activity of absorbent declined obviously. Meanwhile carbonation at 700 ℃ the highest conversion rate is obtained.