Premium
CO 2 absorption characteristics in a random packed column with various geometric structures and working conditions
Author(s) -
Liu Yifang,
Chu Fengming,
Yang Lijun,
Du Xiaoze,
Yang Yongping
Publication year - 2018
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1725
Subject(s) - mass transfer , absorption (acoustics) , structured packing , porosity , packed bed , work (physics) , materials science , mass transfer coefficient , piecewise , aqueous solution , column (typography) , absorption capacity , mechanics , ammonia , thermodynamics , chemical engineering , mathematics , chemistry , composite material , engineering , geometry , mathematical analysis , physics , connection (principal bundle) , organic chemistry
CO 2 emissions have been continuously increasing in recent years and exacerbating global warming, so CO 2 emissions mitigation is of great benefit to the control of climate change. In this work, the computational models of CO 2 absorption by aqueous ammonia solution in a random packed column are developed, where the packing porosity obeys the normal, empirical profile, piecewise constant distributions. The hydrodynamic and mass transfer performances, as well as the CO 2 removal efficiency, are obtained by means of numerical simulation. The results show that the random packing with porosity following the normal distribution leads to a better mass transfer performance, thus a high CO 2 removal efficiency. The height‐to‐diameter ratio of 3 is preferred due to the better CO 2 absorption performance. More ammonia solution can form a bigger interfacial area, and thus enhance mass transfer performance. However, the increased CO 2 flow rate is unfavorable to the CO 2 absorption. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.