Abstract Generally, adding a certain amount of an additive to pulverized coal can promote its combustion performance. In this paper, the effect of CaO on the combustion characteristics and kinetic behavior of semi-coke was studied by thermogravimetric (TG) analysis. The results show that adding proper amount of CaO can reduce the ignition temperature of semi-coke and increase the combustion rate of semi-coke; with the increase in CaO content, the combustion rate of semi-coke increases first and then decreases, and the results of TG analysis showed that optimal addition amount of CaO is 2 wt%. The apparent activation energy of CaO with different addition amounts of CaO was calculated by Coats–Redfern integration method. The apparent activation energy of semi-coke in the combustion reaction increases first and then decreases with the increase in CaO addition. The apparent activation energies of different samples at different conversion rates were calculated by Flynn–Wall–Ozawa integral method. It was found that the apparent activation energies of semi-coke during combustion reaction decreased with the increase in conversion.

中文翻译：

---

CaO对半焦催化燃烧的影响

摘要 一般情况下，在煤粉中加入一定量的添加剂可以促进其燃烧性能。本文通过热重(TG)分析研究了CaO对半焦燃烧特性和动力学行为的影响。结果表明，加入适量的CaO可以降低半焦的着火温度，提高半焦的燃烧速度；随着CaO含量的增加，半焦的燃烧速率先增大后减小，TG分析结果表明CaO的最佳添加量为2wt%。通过 Coats-Redfern 积分法计算不同 CaO 添加量的 CaO 的表观活化能。半焦在燃烧反应中的表观活化能随着CaO添加量的增加先增大后减小。通过Flynn-Wall-Ozawa积分法计算不同样品在不同转化率下的表观活化能。发现半焦在燃烧反应过程中的表观活化能随着转化率的增加而降低。