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

• 能源和环境工程 • 上一篇    下一篇

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. 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. 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:

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*+λ*/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*+λ*/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

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