高校化学工程学报2016，Vol.30Issue(2)：276-285,10.DOI:10.3969/j.issn.1003-9015.2016.02.004
碳酸二乙酯吸收CO 2的性能评价
Performance Evaluation of CO2Capture with Diethyl Carbonate
摘要
Abstract
CO2 emission reduction is now urgently required as global warming intensifies. However, the high cost of capturing CO2seriously restricts its development. Therefore, it is urgent to develop a high-effective carbon capture technology. Diethyl carbonate (DEC) is a novel CO2absorbent. CO2 solubility in DEC was experimentally determined by the constant volume method at the range of 282.79~302.69 K, at same time which was predicted by Prausnitz-Shair method, Molecular Connectivity Index and Peng-Robinson (PR) equation of state. It is showed that the Henry constants of DEC are smaller than those of DMC at the same temperature by comparison of their phase equilibrium data. The continuous absorption and desorption experimental apparatus and process simulation were applied to study on the performance of DEC capturing CO2. The effects of the liquid-gas ratio, absorption temperature, desorption temperature (if thermal desorption was adopted) and N2 flow (if gas stripping desorption was adopted) on CO2absorptivity were studied and the optimal operation conditions were obtained. Through comparison with DMC, it was found that using N2gas stripping desorption the system cost of DEC is smaller than that of DMC. Because of the high energy consumption of thermal desorption and high solvent loss of gas stripping desorption, a novel desorption process was applied, which was modified by applying compression and condensation to desorb the loaded liquid. It simplifies the process and its system cost is smaller than that of thermal desorption, but larger than that of gas stripping desorption. It’s found the results of DEC is better than that of DMC. Results show that DEC is a potential CO2 absorbent.关键词
CO 2捕集/碳酸二乙酯/溶解度测定/预测模型/连续吸收解吸实验Key words
CO2 capture/diethyl carbonate (DEC)/solubility determination/prediction model/continuous absorption and desorption分类
化学化工引用本文复制引用
汤志刚,李红伟,贺志敏,崔敬杰,郭栋,赵志军..碳酸二乙酯吸收CO 2的性能评价[J].高校化学工程学报,2016,30(2):276-285,10.基金项目
国家自然科学重点基金(51134017)。 （51134017）
