Current status and development of membranes for CO2/CH4 separation: A review

Zhang, Yuan; Sunarso, Jaka; Liu, Shaomin; Wang, Rong

doi:10.1016/j.ijggc.2012.10.009

Cited by 561 publications

(324 citation statements)

References 201 publications

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“…The presence of particle agglomerations is detrimental to the performance of the membrane in the separation of gases as it may lead to the formation of undesirable channels across the polymer increasing its gas permeability but not selectivity [30,31]. Also, mechanical strengths of the membrane may be compromised with the presence of agglomerations as it creates more stress convergent points subjected to external forces [32].…”

Section: Resultsmentioning

confidence: 99%

The effect of amine substituent chain length on POSS/Polysulfone mixed matrix membrane

Bong¹,

Oh²,

Chew³

2018

J. MECH. ENG. SCI.

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The main obstacle encountered during the development of polyhedral oligomeric silsesquioxane (POSS) mixed matrix membrane (MMM) via physical blending is the combination of compatible inorganic filler and polymeric matrix. In this work, mono-functional POSS of different amine functionalised substituent chain lengths namely aminopropylisobutyl POSS (AMPOSS-a) and aminoethylaminopropylisobutyl POSS (AMPOSS-b) were incorporated into Polysulfone (PSf) membrane at 1wt%, 2wt% and 3wt% loadings. The effect of amine substituent chain lengths on its compatibility and dispersion properties as well as the glass transition temperature of the MMMs were studied using scanning electron microscope (SEM), energy dispersive X-ray (EDX) and differential scanning calorimeter (DSC). Particle agglomerations were observed to increase with the loadings of both fillers although more prominent in AMPOSS-b/PSf membranes. This was attributed to the interparticle forces such as van der Waals and electrostatic forces. Distribution of both fillers were concentrated at the upper region of the membranes at 1wt% and 2wt% as a consequence of their density difference. The glass transition temperature (T g ) for pristine PSf at 197ºC showed an overall decrement between 40.3ºC to 47.1ºC when AMPOSS-a and AMPOSS-b were incorporated. The decrement was due to AMPOSS particle loadings, surface chemistry and particle-polymer chain topology. Hence, mono-substituted POSS with varying amine substituent chain lengths did not improve the glass transition temperature nor contribute to homogeneous MMM morphology. This had been identified to be the consequence of POSS surface energy, which might be caused by the association of hydrocarbon chains saturated on the particle surface due to the presence of isobutyl group.

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Section: Resultsmentioning

confidence: 99%

The effect of amine substituent chain length on POSS/Polysulfone mixed matrix membrane

Bong¹,

Oh²,

Chew³

2018

J. MECH. ENG. SCI.

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“…This is due to the competition of H 2 S and CO 2 for being absorbed by the solvent. As it is found from the literature 9,10 , the increase in H 2 S concentration decreases the overall mass transfer coefficient of CO 2 . Therefore, with increasing H 2 S concentration or H 2 S partial pressure in the feed gas phase, more H 2 S molecules dissolve and react with the amine absorbent.…”

Section: Effect Of Co 2 Feed Concentrationsmentioning

confidence: 60%

Investigation of H2 S and CO2 Removal from Gas Streams Using Hollow Fiber Membrane Gas–liquid Contactors

Mirfendereski¹

2017

Chem.Biochem.Eng.Q.

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Chemical absorption of H 2 S and CO 2 from CH 4 was carried out in a polypropylene porous asymmetric hollow fiber membrane contactor (HFMC). A 0.5 mol L -1 aqueous solution of methyldiethanolamine (MDEA) was used as chemical absorbent solution. Effects of gas flow rate, liquid flow rate, H 2 S concentration and CO 2 concentration on the H 2 S outlet concentrations and CO 2 removal percentage were investigated.The results showed that the removal of H 2 S with aqueous solution of MDEA was very high and indicated almost total removal of H 2 S. Experimental results also indicated that the membrane contactor was very efficient in the removal of trace H 2 S at high gas/ liquid flow ratio. The removal of H 2 S was almost complete with a recovery of more than 96 %. Using feed gas mixtures containing 5000 ppm H 2 S with CO 2 concentrations in the range of 4-12 vol.%, the outlet H 2 S concentration of less than 1.0 ppm was attained with less than 4.0 vol.% of CO 2 permeated and absorbed.

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“…This project is aimed to develop a polycarbonate-silica mixed matrix membrane for CO 2 /CH 4 separation and analyze the characteristics and the performance in term of permeability and selectivity. Through the end, a polycarbonate-silica mixed matrix membrane is successfully developed.…”

Section: Resultsmentioning

confidence: 99%

“…This is because membrane is an energy efficiency system, easy to scale up and has simple process design compared to other conventional technology [2].…”

Section: Methods Of Separationmentioning

confidence: 99%