摘要
在500-800℃的温度范围内，在流化床反应器床料中添加CaO吸收剂，进行含氯有机废液(含三氯乙醛)的焚烧脱氯实验．实验表明，600℃脱氯效果最佳，温度升高脱氯效果下降．通过对产物层进行扫描电子显微镜(SEM)分析表明，在温度大于600℃的条件下，CaO与HCl之间的反应在相当长的一段时间内受化学反应和产物层扩散共同控制，不存在产物层扩散的单独控制．考虑粒子的体积膨胀率，利用缩核模型对反应处于产物层扩散控制阶段进行动力学分析，得出产物层扩散活化能为9．95kJ·mol^-1．
The capacity of CaO for binding HCl from incineratio n of organic wastewater which contains C 2H 3Cl 3O 2 was investigated at 500— 800 ℃ in a bubbling fluidized bed.The binding capacity was the largest at 600 ℃, and then decreased with increasing temperature.Scanning electron microscope (SEM) analyses showed that the rate-limiting step for the reaction altered with the extent of solid conversion in sequence at temperature exceeding 600 ℃: che mical reaction control,and simultaneous chemical reaction and product layer diff usion control for a long period of time.There was not a single product layer dif fusion control.The experimental results were analyzed by using the unreacted shr inking core model.The activation energy of product layer diffusion was about 9. 95 kJ·mol -1 for the range of temperatures in the fluidized bed.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第2期318-323,共6页
CIESC Journal
基金
哈尔滨工业大学跨学科交叉性研究基金(HIT MD2001 15)
黑龙江省博士后启动基金 (01502348)
黑龙江省自然科学基金 (B0317).~~
关键词
有机废液
流化床
焚烧
缩核模型
organic wastewater
fluidized bed
incineration
the u nreacted shrinking core model
