高压下CO2 emimTf2N溶解度实验研究.docxVIP

高压下CO2-[emim][Tf2N]溶解度实验研究 摘要 随着社会的发展，能源日益枯竭和环境的温室效应问题越来越多的受到人们的关注，并且在当今时代已经成为全世界都面临和深思并需求找到有效的方法解决的社会性问题。在吸收式制冷系统中，系统性能的好坏在很大的程度上都依赖于制冷工质的化学和热力学性质，工质对的汽液相平衡数据是制冷系统热力参数的计算以及系统的动力循环分析师不可缺少的数据。而CO2 是一种环境友好的自然工质，其ODP为0，GWO为1，具有单位容积制冷量大、传热损失小、节流损失小、化学性质稳定、经济性好等优点。本文主要通过实验研究了高压下CO2-[emim][Tf2N]溶解度问题，通过实验研究，将CO2-[emim][Tf2N]的汽液相平衡数据进行整理和分析，得出CO2和离子液体[emim][Tf2N]的混合二元体系中CO2的溶解度随着温度的升高而降低，随着压力的升高而增加。关键词：吸收式制冷系统，自然工质，CO2-[emim][Tf2N]，溶解度AbstractWith the development of society, the depletion of energy and the greenhouse effect of the environment are attracting more and more peoples attention, and in the present era has become the world is facing and thinking and need to find effective ways to solve the social problems. In the absorption refrigeration system, the system performance depends very much on the chemical and thermodynamic properties of the refrigerant. The vapor-liquid equilibrium data of the working fluid is the calculation of the thermal parameters of the refrigeration system and the power of the system Circulate the analyst indispensable data. CO2 is an environment-friendly natural working fluid, its ODP is 0, GWO is 1, with a unit volume of cooling capacity, heat loss is small, throttling loss is small, stable chemical properties, good economy and so on. In this paper, the solubility of CO2- [emim] [Tf2N] under high pressure is studied experimentally. The experimental results show that the vapor-liquid equilibrium data of CO2- [emim] [Tf2N] are collated and analyzed to obtain CO2 and ionic liquid [ The solubility of CO2 in the mixed binary system decreases with increasing temperature, and increases with increasing pressure.Keywords: absorption refrigeration system, natural working fluid, CO2- [emim] [Tf2N], solubility1 绪 论 吸收式制冷系统可利用地热、太阳能和废热等低品位能源作为驱动能源，具有较高的热转换效率。吸收式制冷循环使用的制冷工质有水系、氨系、醇系和氟利昂系，但CFC 和 HFC等氟利昂的全球变暖潜能值（GWP）和消耗臭氧潜能值（ODP）较高；氨虽为天然工质，但其汽化潜热小、可燃有毒，氨水接收制冷循环需要精馏部件并且不容易实现多效化；溴化锂吸收制冷循环局限在0℃以上，产生的结晶和腐蚀问题也较突出，因此对吸收制冷工质对进行创新升级是各国相关学者的当务之急。1.1 课题背景