基于新型低温物理吸收剂的IGCC碳捕集研究

It is carbon dioxide that causes global warming and the rising level of sea and other environmental issues. As a result, carbon capture technology is attracted by many researchers. Carbon capture in IGCC plant, which is rich in H2 and CO2 under mid-high pressure, has been chosen as the technical background. In this application, physical absorbents that suitable for absorption at low temperature, are carried out the fundamental researches, using the approaches of chemical thermodynamics and thermal kinetics. A set of synchronization experimental system will be established, combing Calvet micro-calorimeter and gas-liquid equilibrium device of isothermal synthetic method. The density, viscosity, vapor pressure and specific heat capacity of the absorbents, and gas-liquid equilibrium data, as well as the heat of absorption/desorption of CO2/H2+absorbent systems will be determined. Study and establish models of thermophysical properties, gas-liquid equilibrium and thermal analysis dynamics for describing the systems of CO2/H2+absorbent. Clarify the molecular interactions mechanisms and its relationship with key thermophysical properties, the gas-liquid equilibrium as well as the thermal analysis dynamics of absorption/desorption process. Carry out the simulation study simulation study on new physical absorbent for carbon capture in IGCC plant. Reveal the relative mechanisms between the thermophysical properties, the gas-liquid equilibrium and the thermal analysis dynamics of absorption/desorption process versus the energy characteristics of the technology and strengthen the technological process. Provide basic data and theoretical support for new technology that is high efficiency and low energy cost and the new method for carbon capture.

CO2引发了海平面上升，全球变暖等环境问题，碳捕集受到研究者的广泛关注。以IGCC等中高压富氢富CO2气流碳捕集为技术背景，本申请采用相平衡与热动力学同时分析的研究方法，开展适宜低温吸收的CO2物理吸收剂基础研究。研究建立一套Calvet微量量热计和等温合成法相平衡同步测试实验系统。测定吸收剂密度、黏度、蒸汽压和比热容等热物性，CO2/H2+吸收剂体系的相平衡、溶解/解吸焓等基础数据。建立描述研究对象体系的热物性、相平衡模型与热动力学模型，阐明吸收剂分子间作用对关键热物性，及其吸收/解吸过程相平衡/热动力学行为的关联规律。研究基于新型物理吸收剂的IGCC碳捕集流程模拟，揭示吸收剂的热物性，及吸收/解吸过程相平衡/热动力学特征对工艺能耗特性的关联规律，并强化工艺流程。本项目研究将为高效低能CO2吸收分离新工艺的开发，以及CO2捕集新方法的探索提供相关基础数据和理论支撑。

CO2引发了海平面上升，全球变暖等环境问题，碳捕集受到研究者的广泛关注。本项目选择具有潜质的18种常规溶剂及3种聚合物为主要的研究对象，采用化学热力学与热动力学方法，开展了适宜低温吸收的CO2物理吸收剂的基础研究。项目组将微量量热计与等温合成法相平衡装置组成的同步测试实验系统。测定了上述吸收剂的密度、动力黏度等热物性、溶解度与气液相平衡及吸收热数据；建立描述气体+吸收剂体系的气液相平衡与热动力学模型，阐明吸收剂的分子结构对其热物性、相平衡/热动力学、吸收行为的影响规律；模拟新吸收剂用于IGCC流程，探寻碳捕集效率及CO2分离过程能耗之间的关系，并探讨了工艺强化的方向。本项目有关的研究基础工作将为高效低能CO2吸收分离新工艺的开发及CO2捕集新方法的探索提供相关基础数据和理论支撑。