Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 58, Issue 45, Pages 20828-20837Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b04641
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Funding
- National Key RD Plan [2016YFCO205700]
- National Natural Science of China [21506093, 91534108, 21706114]
- Natural Science Foundation of Jiangsu Province [BK20150947, BK20160979]
- National High Technology Research and Development Program of China [2012AA03A606]
- Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18_1070]
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Postcombustion SO2 capture-from a high-volume flue gas-calls for a separator which should possess a high gas/liquid ratio concurrently without causing liquid flooding and entrainment. This study aimed to evaluate the feasibility of a hydrophilic ceramic membrane for SO2 separation by investigating the mass-transfer characteristics of SO2 absorption into NaOH coupling with a tubular Al2O3 membrane. We first established a numerical two-dimensional model to simulate the SO2 absorption process with respect to the available experimental data. Then, we analyzed the masstransfer characteristics by simulating the distributions of SO2 and OH - in the membrane contactor and estimating the resistances of SO2 transfer in different phases. Simulations showed that the SO2-NaOH reaction was quite rapid and mostly occurred in the gas/liquid interface, leading to a minor membrane-phase resistance. Furthermore, effective NaOH concentration lines under several key membrane parameters and operating conditions were proposed to facilitate the design of a membrane contactor.
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