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| 耦合膜分离的新型CO2低温捕集系统性能优化 | |
| 引用本文： | 田华,孙瑞,宋春风,邓帅,石凌峰,康克,舒歌群.耦合膜分离的新型CO2低温捕集系统性能优化[J].化工进展,2020,39(7):2884-2892. |
| 作者姓名： | 田华 孙瑞 宋春风 邓帅 石凌峰 康克 舒歌群 |
| 作者单位： | 1.天津大学内燃机燃烧学国家重点实验室，天津 300072;2.天津大学环境科学与工程学院，天津 300072;3.中低温热能高效利用教育部重点实验室(天津大学)，天津 300350 |
| 摘 要： | CO2捕集作为温室气体排放控制的有效手段已成为重要研究课题。作为新兴捕集技术之一，低温CO2捕集因产品纯度高、无附加污染等优势受到关注。然而，该技术能耗和捕集率对于气体中CO2浓度十分敏感，对于高CO2浓度气体可获得较高的CO2捕集率和较低能耗水平。基于此，本文提出了耦合膜分离的新型CO2低温捕集系统，通过膜材料选择渗透性实现待捕集气体CO2浓度主动调控，并在最优浓度下进行CO2低温捕集。首先基于不同传统低温捕集系统特点，对比分析了不同耦合系统模式，从而确定了最优耦合系统结构。针对最优耦合系统进行了运行参数优化，并分别基于实现系统捕集能耗最低与捕集率最高的目标，获得了膜渗透侧CO2浓度与进气CO2浓度间的关系式，为该耦合系统中膜组件选型提供指导。研究表明，本文提出的耦合系统捕集能耗为1.92MJ/kgCO2，相比于传统单一低温系统捕集能耗可降低16.5%。 |
| 关 键 词： | 二氧化碳捕集 低温 膜 耦合系统 优化 |
Optimization of novel hybrid cryogenic CO2 capture process with membrane separation |
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| TIAN Hua,SUN Rui,SONG Chunfeng,DENG Shuai,SHI Lingfeng,KANG Ke,SHU Gequn.Optimization of novel hybrid cryogenic CO2 capture process with membrane separation[J].Chemical Industry and Engineering Progress,2020,39(7):2884-2892. | |
| Authors: | TIAN Hua SUN Rui SONG Chunfeng DENG Shuai SHI Lingfeng KANG Ke SHU Gequn |
| Affiliation: | 1.State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China 2.School of Environmental Science and Technology, Tianjin University, Tianjin 300072, China 3.Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, Tianjin 300350, China |
| Abstract: | As an effective means of greenhouse gas emission control, CO2 capture has become an important research topic. As one of the emerging technologies, cryogenic CO2 capture has received attention due to its technological advantages in product purity. However, energy consumption and CO2 recovery in the cryogenic CO2 capture are very sensitive to feed gas CO2 concentration, and the high CO2 concentration feed gas is beneficial for obtaining a higher CO2 recovery and a lower energy consumption level simultaneously. Therefore, a novel hybrid cryogenic CO2 capture process with membrane separation was proposed. The feed gas CO2 concentration was actively controlled by membrane selectivity, hence cryogenic CO2 capture was carried out at the optimal concentration. In this paper, based on the characteristics of different traditional cryogenic capture processes, different hybrid process modes were compared and analyzed to determine the optimal hybrid process structure. The optimal operating parameters of the hybrid process were determined, and the relationship between membrane permeate side CO2 concentration and feed gas CO2 concentration was obtained based on the goal of achieving the lowest energy consumption and the highest CO2 recovery, providing guidance for the selection of membrane modules in the hybrid process. The energy consumption of the proposed hybrid process is 1.92MJ/kgCO2, which was reduced by 16.5% compared to the traditional cryogenic process. |
| Keywords: | CO2 capture cryogenic membranes hybrid process optimization |
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