项目名称: 分步再生的两元非水溶剂高效捕集CO2的力耦合机理研究
项目编号: No.51276141
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 能源与动力工程
项目作者: 张早校
作者单位: 西安交通大学
项目金额: 80万元
中文摘要: 化学吸收法是实现规模化减排二氧化碳的有效方法之一,但是,该方法的高能耗缺陷一直制约其发展。解决该问题的突破点是降低化学吸收法中水溶液产生的过程阻力。因此,本申请提出非水两元溶剂吸收CO2和70℃-80℃分步再生CO2(富液中自由态溶剂分离后再生CO2)的新型过程,研究其用于高效捕集CO2的作用机理。拟建立以力为基本单元的强相互作用、弱相互作用和化学作用耦合的密度泛函理论模型,分析非水溶剂对于CO2吸收和分步再生过程发生的阻力,获得捕集过程强化的力耦合原则。同时,拟建立反应塔器中微观强(弱)相互作用、两相界面相互作用力、体积力和引力的力耦合追踪运动界面的气液两相流模型,揭示自由态非水溶剂分离对气液两相流流动与换热的力耦合机理,形成有效降低传质和传热阻力的力耦合系统集成方法、微观尺度力和宏观尺度力协调优化的可行性准则,从而促进化学吸收法捕集CO2的工业应用,实现有效减排温室气体的目的。
中文关键词: 二氧化碳捕集;吸收法;非水再生;溶剂;耦合
英文摘要: Chemical absorption is an effective way to mitigate the CO2 emission on a large scale. However, its substantial energy consumption has barricaded its development. The breakthrough is to reduce the water resistances to the chemical absorption of CO2 in the aqueous solution. Thus, an innovative process comprised of two non-aqueous solvents absorption of CO2 and stepwise regeneration of CO2 at 70℃to 80℃ (regeneration of CO2 following free solvent evaporation in the rich solution) was proposed to investigate the mechanism of the solvent impacts on the effective CO2 capture. This work is to develop a density functional theory coupling strong interactions, weak interactions and chemical interactions by the fundamental force element, analyze the non-aqueous solvent resistances to CO2 absorption and stepwise regeneration, and subsequently obtain the force coupled principles for the capture process intensification. Meanwhile, a gas and liquid two phase flow model will be established, which provides the interface tracing by coupled forces of microscopic strong (weak) interactions, interface forces betweeen the two phases, body focres and gravational forces. The discovery of coupled forces mechanism of free non-aqueous solvent separation impact on two phase flow and heat transfer produces the system integration method of c
英文关键词: CO2 capture;absorption method;non-aqueous regeneration;solvent;coupling