磷石膏强化氨法CO2捕集机理与模型

doi:10.11949/j.issn.0438-1157.20150741

化工学报 ›› 2015, Vol. 66 ›› Issue (8): 3218-3224.DOI: 10.11949/j.issn.0438-1157.20150741

磷石膏强化氨法CO₂捕集机理与模型

李季¹, 周加贝¹, 朱家骅¹, 夏素兰¹, 葛敬¹, 商剑峰², 崔文鹏³, 刘项⁴

1 四川大学化学工程学院, 四川成都 610065;
2 中国石化中原油田普光分公司, 四川达州 635000;
3 中国石化中原油田分公司天然气处理厂, 河南濮阳 457061;
4 中国石化南京工程公司, 江苏南京 211100

收稿日期:2015-05-29 修回日期:2015-06-09 出版日期:2015-08-05 发布日期:2015-08-05
通讯作者: 朱家骅
基金资助:
国家自然科学基金项目(21276161);国家科技支撑计划课题(2013BAC12B01)。

Mechanism and model of ammonia-based carbon dioxide trapping enhanced by gypsum particles

LI Ji¹, ZHOU Jiabei¹, ZHU Jiahua¹, XIA Sulan¹, GE Jing¹, SHANG Jianfeng², CUI Wenpeng³, LIU Xiang⁴

1 School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China;
2 Puguang Branch of SINOPEC Zhongyuan Oilfield, Dazhou 635000, Sichuan, China;
3 Nature Gas Processing Plant of SINOPEC Zhongyuan Oilfield, Puyang 457061, Henan, China;
4 SINOPEC Nanjing engineering Co., Ltd., Nanjing 211100, Jiangsu, China

Received:2015-05-29 Revised:2015-06-09 Online:2015-08-05 Published:2015-08-05
Supported by:
supported by the National Natural Science Foundation of China (21276161) and the project supported by National Science and Technology Ministry (2013BAC12B01).

摘要/Abstract

摘要：

基于化学活性颗粒强化气液吸收机理,建立了磷石膏悬浮液强化氨法烟气CO₂捕集模型。以液膜内量纲一传质距离λ^*为特征参数,增强因子E=1/λ^*+qβλ^*/2。用恒温反应器在不同搅拌转速及磷石膏颗粒固含量下实验测定CO₂吸收增强因子对模型进行检验,结果表明:随颗粒固含量由5%增加到30%(质量分数),增强因子由1.69增加到2.10;而随搅拌转速从150 r·min^-1增加到300 r·min^-1,增强因子仅由1.75略增到1.80,表明磷石膏颗粒固含量及溶解速率是影响增强因子的控制性因素。实验结果与模型预测值吻合良好, 偏差小于10%。

关键词: 吸收, 增强因子, 传质, 磷石膏颗粒, CO₂矿化

Abstract:

Based on reaction plane theory, a mass transfer model of gas-liquid reaction absorption enhanced by reactive particles was established for the absorption of CO₂ into aqueous ammonia suspension with gypsum particles. The absorption enhancement factor was derived theoretically as E=1/λ^*+qβλ^*/2 with the dimensionless reaction position λ^* as the characteristic parameter. The validation experiments of CO₂ absorption into the suspension was carried out in a thermostatic reactor and the enhancement factors were measured with different solids loadings at selected speeds. The results showed that the enhancement factor increased from 1.69 to 2.10 when the solids loadings varied from 5% to 30% (mass); and it changed sparingly from 1.75 to 1.80 as the stirred speed varied from 150 to 300 r·min^-1. It revealed that the enhancement factors were controlled by the solids loading and dissolution rate of gypsum particles. The experimental data agreed well with the model prediction, with a maximum deviation of 10%.

Key words: absorption, enhancement factor, mass transfer, gypsum particles, CO₂ mineralization

中图分类号:

TQ019

李季, 周加贝, 朱家骅, 夏素兰, 葛敬, 商剑峰, 崔文鹏, 刘项. 磷石膏强化氨法CO₂捕集机理与模型[J]. 化工学报, 2015, 66(8): 3218-3224.

LI Ji, ZHOU Jiabei, ZHU Jiahua, XIA Sulan, GE Jing, SHANG Jianfeng, CUI Wenpeng, LIU Xiang. Mechanism and model of ammonia-based carbon dioxide trapping enhanced by gypsum particles[J]. CIESC Journal, 2015, 66(8): 3218-3224.

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磷石膏强化氨法CO₂捕集机理与模型

Mechanism and model of ammonia-based carbon dioxide trapping enhanced by gypsum particles

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