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Mass Transfer Analysis of CO 2 Capture by PVDF Membrane Contactor and Ionic Liquid
Author(s) -
Gómez-Coma Lucia,
Garea Aurora,
Irabien Angel
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201600293
Subject(s) - contactor , mass transfer , hollow fiber membrane , ionic liquid , membrane , absorption (acoustics) , mass transfer coefficient , solubility , chemistry , analytical chemistry (journal) , chemical engineering , fiber , fluoride , membrane technology , materials science , chromatography , inorganic chemistry , thermodynamics , organic chemistry , composite material , catalysis , power (physics) , physics , biochemistry , engineering
Post‐combustion processes based on ionic liquids (ILs) and membrane contactors are attractive alternatives to traditional systems. Here, a gas stream composed of 15 % CO 2 and 85 % N 2 flowed through the lumen side of a hollow‐fiber membrane contactor containing poly(vinylidene fluoride)‐IL (PVDF‐IL) fibers. The IL 1‐ethyl‐3‐methylimidazolium acetate [emim][Ac] served as an absorbent due to its high chemical absorption and CO 2 solubility. The overall mass transfer coefficient ( K overall ), activation energy ( E a ), and resistances of the hollow‐fiber membrane were quantified. The K overall value was one order of magnitude higher than those reported in previous works with conventional solvents, and the E a was lower than formerly stated values for other solvents. A theoretical simulation was conducted to estimate the operational parameters required for 90 % CO 2 capture and to quantify intensification effects related to CO 2 absorption in a packed column.
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