CO<sub>2</sub> absorption by aqueous ammonia solution with use of external magnetic field

ZHANG Qi; WU Jiayi; LU Ping; WU Tao; SHAO Jingping; DENG Xiaoyan

doi:10.11949/j.issn.0438-1157.20161596

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CO₂ absorption by aqueous ammonia solution with use of external magnetic field

更新时间：2025-12-10

- CO₂ absorption by aqueous ammonia solution with use of external magnetic field
- CIESC Journal Issue 6, Pages: 2555-2562(2017)
- 作者机构：
  
  南京师范大学能源与机械工程学院,江苏,南京,210042
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161596
  CLC： 701.7X511
- Online First：05 June 2017，
  
  Published：05 June 2017
- 稿件说明：
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ZHANG Qi, WU Jiayi, LU Ping, et al. CO₂ absorption by aqueous ammonia solution with use of external magnetic field[J]. CIESC Journal, 2017, (6): 2555-2562. DOI: 10.11949/j.issn.0438-1157.20161596.
DOI：

ZHANG Qi, WU Jiayi, LU Ping, et al. CO₂ absorption by aqueous ammonia solution with use of external magnetic field[J]. CIESC Journal, 2017, (6): 2555-2562. DOI: 10.11949/j.issn.0438-1157.20161596. DOI：

摘要

开发了一种新型磁场辅助氨法烟气脱碳技术。含碳烟气通入混有磁性颗粒的氨水溶液，在外加磁场的作用下发生脱碳反应。对该技术的运行特性开展了实验研究。结果表明，外加8 mT恒稳磁场，2 g·L-1纳米级Fe3O4颗粒，氨水的CO2脱除效率比不添加磁场和颗粒时最多可提高8.8%。外加磁场可以有效提高低浓度氨水的CO2脱除效率。在模拟烟气流量增加时，外加磁场能有效减缓CO2脱除效率下降的趋势。同时，外加磁场使得CO2脱除效率曲线向低温方向移动5℃，有助于提高低温条件下的CO2脱除效率。磁场可提高气液接触效率、降低相间传质阻力、增强氨水反应活性，从而提高氨水吸收CO2性能。

Abstract

A novel ammonia-based CO2 capture process was proposed in the paper. The process uses magnetically gas-solid-liquid bed as the reactor in which the ferromagnetic particles suspend in aqueous ammonia solutions under the influence of external magnetic field (EMF). A continuous of CO2 passed through the reactor was absorbed by aqueous ammonia. Experiments in a laboratory-scale apparatus were carried out to investigate the roles of EMF. The results showed that the highest CO2 absorption efficiency with 8 mT EMF and 2 g·L-1 nano-magnetic particles reached 94.3%

more than 8.8% compared to that without EMF and nanoparticles. CO2 absorption efficiency with EMF and nanoparticles increased significantly under the conditions of low concentration aqueous ammonia (5%—8%)

large flux of simulated flue gas (3.5 L·min-1) and low absorption temperature (22—36℃). The enhancement of CO2 absorption under the influence of EMF and nanoparticles should be attributed to good gas-liquid contact

large mass transfer coefficient and high reactivity of aqueous ammonia.

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CO2 absorption by aqueous ammonia solution with use of external magnetic field

DOI：10.11949/j.issn.0438-1157.20161596

摘要

Abstract

关键词

Keywords

references

CO₂ absorption by aqueous ammonia solution with use of external magnetic field