摘要
采用缩核模型对超细石灰石热解进行了模拟。由于颗粒较小,模型忽略了传热对热解影响,假定石灰石热解过程由二氧化碳扩散和反应界面处反应速度决定,反应速率与反应界面处二氧化碳的压力成反比,结合热解过程中由于烧结所引起的比表面积的变化,计算热解率随温度、比表面积、粒径等变化规律以及界面处压力对热解率的影响,并由试验对计算结果进行了验证。
A shrinking core model is used to account for the calcination process of ultra-fine limestione. Heat transfer is ignored in this model because of small particles. This model further assumes that the calcination rate is controlled by CO_2 diffusivity and the reaction rate at interface. The reaction rate is inverse proportional to pressure of CO_2. This model considered the effect of surface area loss caused by sintering on the calcination rate. The effects of temperature,surface area and particle size, et al on the calcination rate are simulated and examined by experimentation.Figs 6, table 1 and refs 10.
出处
《动力工程》
CSCD
北大核心
2004年第1期110-113,共4页
Power Engineering
关键词
环境工程学
超细石灰石
热解
烧结
缩核模型
environmental engineering science
ultra-fine limestone
calcination
sintering
shrinking core model
