Numerical investigation of the effects of polypropylene hollow fibre membrane structure on the performance of CO₂ removal from flue gas

Abstract

Carbon dioxide (CO2) absorption from flue gas by hollow fibre membrane contactors is considered as a clean, highly efficient and promising decarburisation technique.

An experimental study on the stability of PVDF hollow fiber membrane contactors for CO2 absorption with alkanolamine solutions

“…In addition, it has been found that wall thickness, packing density, porosity, tortuosity, inner diameter and ber length play important roles in CO 2 absorption performance. 6 The simulation results of CO 2 absorption through a hydrophobic polypropylene (PP) hollow ber membrane contactor showed that good CO 2 removal can be achieved for the membrane with a wall thickness in the range of 30-50 mm, an inner diameter of 90-110 mm, a ber length of greater than 150 mm, and a packing density of 21-25%.…”

Theoretical investigations on the effect of absorbent type on carbon dioxide capture in hollow-fiber membrane contactors

“…In fact, high fiber porosity may lead to decreasing the anti-wetting property, and consequently can enhance mass transfer resistance by penetrating solvent into membrane pores. In addition, high fiber porosity can decrease the self-supporting capability of the contactor and enhancing the difficulties in membrane fabrication [ 23 ]. A sharp increase in CO 2 absorption can be seen for other four absorbents in particular for EEA solvent.…”

“…The DEAB and MEA solvents need 0.2 m and 0.4 m of membrane length for the maximum recovery and after that the increase is too small, so, it does not require to waste the material for making longer membrane. It is appropriate to use shorter membrane that is convenient for the process, system maintenance, and site installation [23]. So, there would be an optimized membrane fiber length based on the amount CO 2 absorption and manufacturing, installation, and maintenance costs.…”

“…However, they have a number of issues such as significant regeneration energy and losses during evaporation [ 18 ]. Using different alkanolamine solvents including MEA [ 19 ], Methyldiethanolamine (MDEA) [ 20 ], triethylamine (TEA) [ 21 ], ethylenediamine (EDA) [ 22 ], ethyl-ethanolamine (EEA) [ 23 ], and 4-diethylamino-2-butanol (DEAB) [ 24 ] for CO 2 absorption have been investigated.…”

Investigating the effect of sparger configuration on the hydrodynamics of a full-scale membrane bioreactor using computational fluid dynamics

“…With the aid of CFD simulation, local parameters, which are difficult to measure experimentally, can be calculated. Several inclusive studies can be found on the CFD simulation of MBRs, [9][10][11][12][13][14][15][16][17][18][19] airli bioreactors, 20,21 stirred tank reactors, 22,23 and bubble columns. 24,25 In an MBR, aeration is the main mixing mechanism; 10 hence, optimization of mixing characteristics affects the energy consumption.…”