Dongyuan Chang, Siyang Tang, Shan Zhong, Yangyang Yu, Chao Chen, Houfang Lu, Bin Liang
{"title":"Evaluation of Near-Isothermal Phase-Change CO2 Capture Technology with Heat Pump","authors":"Dongyuan Chang, Siyang Tang, Shan Zhong, Yangyang Yu, Chao Chen, Houfang Lu, Bin Liang","doi":"10.1021/acs.iecr.4c00722","DOIUrl":null,"url":null,"abstract":"Developing low-energy decarbonization technology is crucial for achieving large-scale CO<sub>2</sub> capture from industrial flue gas. During the absorption of CO<sub>2</sub>, phase-change solvents (PCSs) can be separated into a CO<sub>2</sub>-rich phase and a CO<sub>2</sub>-lean phase. By exclusively supplying the CO<sub>2</sub>-rich phase to the desorber for solvent regeneration, the need for sensible heat is eliminated as a result of the reduction of the amount of solvent. However, the heat absorbed by the CO<sub>2</sub>-lean phase remains unrecovered. This study proposes a near-isothermal CO<sub>2</sub> capture technology utilizing phase-change solvents (NI-PCSs-TCC) to recover the reaction heat absorbed by the CO<sub>2</sub>-lean phase to compensate for regeneration heat through a heat pump system. A Solvent-Technology Matching Method (STMM) is proposed, which helps to co-optimize the solvent concentration and process operation parameters. The optimal operating range for the MEA/sulfolane/water solvent concentration and process parameters within the NI-PCSs-TCC is evaluated. NI-PCSs-TCC can achieve an energy consumption of 2.16 GJ/t CO<sub>2</sub> between the temperature ranges of 338.15–341.15 K for absorption and 379.15–383.15 K for desorption. This energy reduction is possible while maintaining a capture efficiency of over 90% and a lean loading of 0.2540 mol of CO<sub>2</sub>/mol of amine.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial & Engineering Chemistry Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1021/acs.iecr.4c00722","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Developing low-energy decarbonization technology is crucial for achieving large-scale CO2 capture from industrial flue gas. During the absorption of CO2, phase-change solvents (PCSs) can be separated into a CO2-rich phase and a CO2-lean phase. By exclusively supplying the CO2-rich phase to the desorber for solvent regeneration, the need for sensible heat is eliminated as a result of the reduction of the amount of solvent. However, the heat absorbed by the CO2-lean phase remains unrecovered. This study proposes a near-isothermal CO2 capture technology utilizing phase-change solvents (NI-PCSs-TCC) to recover the reaction heat absorbed by the CO2-lean phase to compensate for regeneration heat through a heat pump system. A Solvent-Technology Matching Method (STMM) is proposed, which helps to co-optimize the solvent concentration and process operation parameters. The optimal operating range for the MEA/sulfolane/water solvent concentration and process parameters within the NI-PCSs-TCC is evaluated. NI-PCSs-TCC can achieve an energy consumption of 2.16 GJ/t CO2 between the temperature ranges of 338.15–341.15 K for absorption and 379.15–383.15 K for desorption. This energy reduction is possible while maintaining a capture efficiency of over 90% and a lean loading of 0.2540 mol of CO2/mol of amine.
期刊介绍:
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.