| 真空变温吸附捕集干烟道气中CO2的模拟研究 |
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| 引用本文： | 江南,刘冰,唐忠利,张东辉,李国兵. 真空变温吸附捕集干烟道气中CO2的模拟研究[J]. 化工学报, 2019, 70(10): 4032-4042. DOI: 10.11949/0438-1157.20190725 |
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| 作者姓名： | 江南 刘冰 唐忠利 张东辉 李国兵 |
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| 作者单位： | 天津大学化工学院化学工程研究所,化学工程联合国家重点实验室,天津300350;天津大学化工学院化学工程研究所,化学工程联合国家重点实验室,天津300350;天津大学化工学院化学工程研究所,化学工程联合国家重点实验室,天津300350;天津大学化工学院化学工程研究所,化学工程联合国家重点实验室,天津300350;天津大学化工学院化学工程研究所,化学工程联合国家重点实验室,天津300350 |
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| 摘 要： | 为减缓气候变化，减少CO2的排放，对真空变温吸附(TVSA)从干烟道气中捕集CO2进行了系统的研究。以沸石13X为吸附剂，设计了实验室规模的4塔连续进料的TVSA工艺，并建立数学模型进行数值模拟。模拟结果表明，通过四塔TVSA可获得纯度为97.54%，回收率为96.79%的CO2产品气，其产率为1.7 mol· -1·h-1，能耗为3.14 。此外，考察了进料量、循环回流步骤时间、真空度对产品气纯度、回收率、吸附剂产率和工艺能耗的影响，并且分析了塔内压力与温度变化，详细探讨了塔内气固相浓度随轴向的分布。良好的工艺效果表明，TVSA有潜力成为一种能够生产高纯度高回收率的CO2产品气，并具有良好经济效益的捕碳工艺。
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| 关 键 词： | 烟道气 CO2 真空变温吸附 13X 模拟 |
| 收稿时间： | 2019-06-26 |
| 修稿时间： | 2019-07-31 |
Simulation study on CO2 capture from dry flue gas by temperature vacuum swing adsorption |
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| Nan JIANG,Bing LIU,Zhongli TANG,Donghui ZHANG,Guobing LI. Simulation study on CO2 capture from dry flue gas by temperature vacuum swing adsorption[J]. Journal of Chemical Industry and Engineering(China), 2019, 70(10): 4032-4042. DOI: 10.11949/0438-1157.20190725 |
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| Authors: | Nan JIANG Bing LIU Zhongli TANG Donghui ZHANG Guobing LI |
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| Affiliation: | State Key Laboratory of Chemical Engineering, Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China |
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| Abstract: | To mitigate climate change and reduce CO2 emissions, a systematic study on the capture of CO2 from dry flue gas by temperature vacuum swing adsorption (TVSA) was conducted. With zeolite 13X as adsorbent, a four-bed TVSA with continuous feeding was designed, and a mathematical model was established for numerical simulation. Results showed that with the productivity of 1.7 mol·(kg ads)-1·h-1 and energy consumption of 3.14 MJ· ,, CO2 purity of 97.54% and CO2 recovery of 96.79% can be obtained by the four-bed TVSA process. The effect of feed flowrate, recycle time and vacuum level on purity, recovery, productivity and energy consumption was investigated. Additionally, the pressure and temperature behaviors in the column were analyzed, and the distribution of gas phase and adsorbed phase concentration in the axial direction was discussed in detail. The good performance indicated that TVSA will have the potential to be a cost-effective process capable of producing high purity and high recovery CO2 product. |
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| Keywords: | flue gas CO2 temperature vacuum swing adsorption 13X simulation |
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