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008			191107t20192019my a|||fram|| 000 0 eng d
020			_aTHE0008403(Local) _qhardback
040			_aUMP _beng _cUMP _erda
090			_aFKKSA .I99 2019 r Thesis
100	0		_aIzzati Ahmad Rudaini, _eauthor.
245	1	0	_aPVDF-alumina and PVDF-bentonite hollow fiber membrane for CO2 absorption via membrane contactor / _cIzzati Ahmad Rudaini
264		1	_aKuantan, Pahang : _bUMP, _c2019
264		4	_c© 2019
300			_axiii, 87 pages : _billustrations ; _c30 cm. + _e1 CD-ROM
336			_atext _2rdacontent
336			_atext _2rdacontent
337			_aunmediated _2rdamedia
337			_acomputer _2rdamedia
338			_avolume _2rdacarrier
338			_acomputer disc _2rdacarrier
347			_atext file _bPDF _2rda
500			_aFaculty of Chemical and Natural Resources Engineering
502			_aThesis (Master of Science) -- Universiti Malaysia Pahang – 2019
504			_aIncludes bibliographical references
520	3		_aPVDF hollow fiber membrane contactor system was improved by the addition of alumina and bentonite in terms of membrane structure and wetting resistance. Polyvinylidene fluoride (PVDF) polymer was modified by varying different concentration of alumina and bentonite (1 wt%, 3wt% and 5 wt%). Polymer dope solution (18 wt%) with various concentration of (alumina and bentonite) had been prepared and the hollow fiber membrane was fabricated using wet spinning process. CO2 absorption was conducted using 1 M and 2 M of Monoethanolamine (MEA) as liquid absorbent. The hollow fiber membranes were characterized by using contact angle measurement, gas permeation test and tensile strength test to investigate the mechanical properties and membrane structure. Scanning electron microscope (SEM) and atomic force microscope (AFM) were used to investigate the membrane morphology and surface roughness of the membrane. The introduction of alumina and bentonite to polymer dope solution had improved the PVDF hollow fiber membrane characteristic, including membrane hydrophobicity and CO2 absorption flux. The formation of sponge-like structure and finger-like structure in the membrane was developed by ranging different concentration of alumina and bentonite. Increasing the alumina and bentonite concentration in PVDF dope solution produced more sponge-like structure. The membrane with more sponge-like structure produced high hydrophobic membrane, reasonable mechanical strength, good gas permeability, high surface porosity, small in mean pore size and high absorption flux. The membranes surface roughness analyzed via atomic force microscope (AFM) showed that the mean surface roughness of the outer membrane was lower than inner membrane as the concentration of alumina and bentonite increased. PA5 and PB5 hollow fiber membranes possessed the highest contact angle values of 97.39° and 95.79°. PA5 and PB5 hollow fiber membrane showed the highest absorption flux in 1 M MEA of 3.89 × 10-2 mol/m2.s and 4.08 × 10-2 mol/m2.s at flow rate 200 ml/min, respectively. The CO2 absorption was repeated by using 2 M MEA as absorbent. The absorption flux of PA5 and PB5 hollow fiber membrane had increased up to 6.12 × 10-2 mol/m2.s and 6.35 × 10-2 mol/m2.s, respectively. The long-term absorption test was conducted with PA5 and PB5 hollow fiber membranes in 2 M MEA for 60 hours. From the long-term CO2 absorption flux, PA5 hollow fiber membrane showed much better performance than PB5 hollow fiber membrane. Therefore, PB5 membrane possessed a more sponge-like structure, high water contact angle, good mechanical strength, great gas permeability, high surface porosity with small mean pore size and demonstrated a higher absorption CO2 flux is preferred for CO2 membrane contactor application.
610	2	0	_aFaculty of Chemical and Natural Resources Engineering _xDissertations
650		0	_aUniversities and colleges _xDisertations
650		0	_aTheses
942			_2lcc _cTHESIS