CO2浓度对钙基CO2吸收剂循环反应动力学特性的影响
陈江涛;陈鸿伟;陈龙;危日光
【期刊名称】《华东电力》 【年(卷),期】2012(040)012
【摘要】In order to analyze the effect of CO_2 concentration on kinetic characteristics of the cyclic reactions of Ca-based CO_2 sorbent,the cyclic reaction characteristics of limestone were investigated using the two-stage shrinking-core model.As the results indicate,the change of CO_2 concentration has great influence only on the chemical reaction controlling stage,but the product layer diffusion controlling stage is independent of CO_2 concentration.For single cycle,the increase of CO_2 concentration leads to the shortened time of the chemical reaction controlling stage and the increased apparent chemical reaction rate constant.For multiple cycles,the increase of CO_2 concentration leads to a trend that the apparent chemical reaction rate constant decreases quickly with the increase of cycle numbers.In addition,the CaO carbonation reaction has been saturated at 25% CO_2 concentration,so the further increase of CO_2 concentration can′t improve the final conversion rate.%为分析CO2浓度对钙基CO2吸收剂循环反应动力学特性的影响规律,利用两段的收缩核模型对石灰石循环反应特性进行了研究。结果表明：反应气氛中CO2浓度的变化只对化学反应控制阶段有较大影响,对产物层扩散控制阶段影响不明显。对于单次循环,CO2浓度的增大促
CO2浓度对钙基CO2吸收剂循环反应动力学特性的影响
