| 二元复合溶液脱除烟气中CO2的过程模拟与评价 |
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| 引用本文： | 方童波,赵兵涛,王大淇,苏亚欣. 二元复合溶液脱除烟气中CO2的过程模拟与评价[J]. 化工进展, 2019, 38(3): 1561-1566. DOI: 10.16085/j.issn.1000-6613.2018-1089 |
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| 作者姓名： | 方童波 赵兵涛 王大淇 苏亚欣 |
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| 作者单位： | 上海理工大学能源与动力工程学院,上海,200093;东华大学环境科学与工程学院,上海,201620 |
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| 基金项目： | 上海市自然科学基金(17ZR1419300) |
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| 摘 要： | 为探究吸收容量大、再生能力较强的吸收剂复合吸收燃烧烟气中CO2的性能，采用N-甲基二乙醇胺-哌嗪（MDEA-PZ）、碳酸钾-哌嗪（K2CO3-PZ）以及氨水-哌嗪（NH3-PZ）3种二元复合溶液，基于Rate-based模型对其进行脱碳性能过程模拟。以吸收剂的摩尔流量、温度以及摩尔分数配比（X∶PZ）3个因素进行单因素研究，并在此基础上采用正交试验的方法得出最佳工艺方案。结果表明，随着吸收剂的摩尔流量上升、温度下降以及吸收剂中PZ摩尔分数上升，CO2吸收效率呈上升趋势。在最佳工艺方案中，K2CO3-PZ二元复合溶液最佳吸收温度为40℃，MDEA-PZ和NH3-PZ两种二元复合溶液最佳吸收温度为30℃；3种二元复合溶液最佳摩尔流量为3.5×105kmol/h，最佳摩尔分数配比为60%∶40%。在各自最佳工艺以及其他条件相同的情况下，吸收CO2性能的优劣依次为MDEA-PZ、NH3-PZ以及K2CO3-PZ。
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| 关 键 词： | 烟道气 二氧化碳捕集 Rate-based模型 二元混合物 化学吸收 |
| 收稿时间： | 2018-05-28 |
Process simulation and evaluation of CO2 removal from flue gas by binary compound solutions |
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| Tongbo FANG,Bingtao ZHAO,Daqi WANG,Yaxin SU. Process simulation and evaluation of CO2 removal from flue gas by binary compound solutions[J]. Chemical Industry and Engineering Progress, 2019, 38(3): 1561-1566. DOI: 10.16085/j.issn.1000-6613.2018-1089 |
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| Authors: | Tongbo FANG Bingtao ZHAO Daqi WANG Yaxin SU |
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| Affiliation: | 1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China |
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| Abstract: | To investigate the performance of the absorbents with high absorption capacity and strong regenerative capacity to compound absorbing CO2 in the combustion flue gas, three binary compound solutions of methyldiethanolamine-piperazine (MDEA-PZ), potassium carbonate-piperazine (K2CO3-PZ) and ammonia-piperazine (NH3-PZ) were selected. Based on the Rate-based model, the decarburization performance process simulations were conducted. The effect of three factors of absorbent, including molar flow rate, temperature and molar concentration ratio (X∶PZ), were studied by single-factor method. On this basic, the optimal process conditions were obtained by orthogonal test method. The result showed that, as the molar flow rate of the absorbent increases, the temperature of the absorbent decreases, and the PZ molar concentration in the absorbent increases, the CO2 absorption efficiency increases. Under the optimal process conditions, the optimal absorption temperature of the K2CO3-PZ binary compound solution is 40°C. The optimal absorption temperature of the binary compound solution of MDEA-PZ and NH3-PZ is 30°C. The optimal molar flow rate of the three binary compound solutions is 3.5×105kmol/h, and the optimal molar concentration ratio is 60%∶40%. Under each optimal process conditions and other same conditions, the order of CO2 absorption performance is MDEA-PZ>NH3-PZ>K2CO3-PZ. |
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| Keywords: | flue gas CO2 capture Rate-based model binary mixture chemical absorption |
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