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  • 1
    Online Resource
    Online Resource
    Synthesis, Characterization and Gas Adsorption of Unfunctionalized and TEPA-Functionalized MSU-2
    MDPI AG ; 2022
    In:  Processes Vol. 10, No. 10 ( 2022-09-27), p. 1943-
    Details
    In: Processes, MDPI AG, Vol. 10, No. 10 ( 2022-09-27), p. 1943-
    Abstract: Michigan State University-2 (MSU-2) is notable potential adsorbent for carbon dioxide (CO2) due to its intrinsic properties, which include its highly interconnected three-dimensional (3D) wormhole-like framework structure, high specific surface area, and its large total pore volume, as well as its large amount of surface silanol hydroxyl groups, which facilitate the amine functionalization process. In this study, unfunctionalized MSU-2 was synthesized via a fluoride-assisted two-step process via the solution precipitation method, using Triton X-100 as the surfactant and tetraethylorthosilicate (TEOS) as the silica precursor. Then, the synthesized MSU-2 was functionalized using varying tetraethylenepentamine (TEPA) loadings of 20–60 wt%. The effect of different TEPA loadings on the properties and CO2 adsorption capacity of the MSU samples was investigated. Studies of the CO2 adsorption of the unfunctionalized and TEPA-functionalized MSU-2 samples was conducted at 40 °C and 1 bar of pressure. Furthermore, scanning electron microscopy (SEM); surface area and porosity (SAP) analysis; carbon, hydrogen, nitrogen, and sulfur (CHNS) analysis, X-ray diffractometry (XRD); Fourier transform infrared (FTIR) spectrometry; and thermogravimetric analysis (TGA) were utilized to characterize the resultant unfunctionalized and TEPA-functionalized MSU-2 with different TEPA loadings in order to study their morphologies, pore characteristics, elemental compositions, crystallographic structures, functional groups, chemical bonding, and thermal stability, respectively. The comprehensive results obtained from the analytical instruments and the CO2 adsorption studies indicated that the TEPA-functionalized MSU-2 with 40 wt% of TEPA loading achieved the highest average CO2 adsorption capacity of 3.38 mmol-CO2/g-adsorbent.
    Type of Medium: Online Resource
    ISSN: 2227-9717
    URL: Article
    DOI: 10.3390/pr10101943
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2720994-5
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  • 2
    Online Resource
    Online Resource
    Zeolite RHO Synthesis Accelerated by Ultrasonic Irradiation Treatment
    Springer Science and Business Media LLC ; 2019
    In:  Scientific Reports Vol. 9, No. 1 ( 2019-10-21)
    Details
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 9, No. 1 ( 2019-10-21)
    Abstract: In recent years, there are increasing interest on applying ultrasonic irradiation for the synthesis of zeolite due to its advantages including remarkable shortened synthesis duration. In this project, the potential of ultrasonic irradiation treatment on the synthesis of zeolite RHO was investigated. Ultrasonic irradiation treatment time was varied from 30 to 120 minutes for the synthesis of zeolite RHO. The zeolite RHO solid samples were characterized with X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA) and nitrogen adsorption-desorption analysis. The application of ultrasonic irradiation treatment in this study has accelerated the synthesis of zeolite RHO where the synthesis duration has been significantly shortened to 2 days compared to 8 days required by conventional hydrothermal heating without ultrasonic irradiation treatment. Highly crystalline zeolite RHO crystals in truncated octahedron morphology were successfully formed.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    URL: Article
    DOI: 10.1038/s41598-019-51460-x
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
    detail.hit.zdb_id: 2615211-3
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  • 3
    Online Resource
    Online Resource
    Preparation and Characterisation of Blend Cellulose Acetate Membrane for CO2/N2 Separation
    Penerbit Universiti Sains Malaysia ; 2020
    In:  Journal of Physical Science Vol. 31, No. 2 ( 2020-08-25), p. 15-31
    Details
    In: Journal of Physical Science, Penerbit Universiti Sains Malaysia, Vol. 31, No. 2 ( 2020-08-25), p. 15-31
    Type of Medium: Online Resource
    ISSN: 1675-3402 , 2180-4230
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.21315/jps2020.31.2
    DOI: 10.21315/jps
    DOI: 10.21315/jps2020.31.2.2
    Language: Unknown
    Publisher: Penerbit Universiti Sains Malaysia
    Publication Date: 2020
    detail.hit.zdb_id: 2549008-4
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  • 4
    Online Resource
    Online Resource
    Effect of Solvent Evaporation Time and Casting Thickness on the Separation Performance of Cellulose Acetate Butyrate Blend Membrane
    Penerbit UTM Press ; 2019
    In:  Journal of Applied Membrane Science & Technology Vol. 23, No. 2 ( 2019-07-15)
    Details
    In: Journal of Applied Membrane Science & Technology, Penerbit UTM Press, Vol. 23, No. 2 ( 2019-07-15)
    Abstract: Global warming and climate change due to greenhouse gases (GHGs) emission, mostly carbon dioxide (CO2), have induced global efforts to minimize the concentration of atmospheric CO2. To reduce the effects of this problem, membrane technology is selected for the separation of CO2 due to the energy efficiency and economic advantages exhibited. In this study, the chosen polymeric material, cellulose acetate butyrate (CAB) is optimized using a wet phase inversion method with various molecular weight and different casting conditions due to its outstanding film-forming specifications and capabilities of fabricating a defect-free layer of neat membrane. The membrane was synthesized by blending three different molecular weights (Mn) of 12,000, 30,000 and 70,000 at different casting thickness, 150 µm to 300 µm and solvent evaporation time of 3.5 to 5 min. The results of these predominant parameters were then utilized to determine a high performance CAB membrane suitable for an enhanced CO2/Nitrogen (N2) separation. Eventually, a high separation performance CAB membrane was successfully synthesized with a CO2/N2 selectivity of 1.5819 ± 0.0775 when the solvent evaporation time and casting thickness was optimized at 4.5 min and 300 µm, respectively. Through this study, an improved understanding between membrane casting conditions and membrane performance has been achieved, for future development and progress.
    Type of Medium: Online Resource
    ISSN: 2600-9226
    URL: Article
    DOI: 10.11113/amst.v23n2.151
    Language: Unknown
    Publisher: Penerbit UTM Press
    Publication Date: 2019
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  • 5
    Online Resource
    Online Resource
    The prospect of synthesis of PES/PEG blend membranes using blend NMP/DMF for CO2/N2 separation
    Springer Science and Business Media LLC ; 2021
    In:  Journal of Polymer Research Vol. 28, No. 5 ( 2021-05)
    Details
    In: Journal of Polymer Research, Springer Science and Business Media LLC, Vol. 28, No. 5 ( 2021-05)
    Abstract: Carbon dioxide (CO 2 ) emissions have been the root cause for anthropogenic climate change. Decarbonisation strategies, particularly carbon capture and storage (CCS) are crucial for mitigating the risk of global warming. Among all current CO 2 separation technologies, membrane separation has the biggest potential for CCS as it is inexpensive, highly efficient, and simple to operate. Polymeric membranes are the preferred choice for the gas separation industry due to simpler methods of fabrication and lower costs compared to inorganic or mixed matrix membranes (MMMs). However, plasticisation and upper-bound trade-off between selectivity and permeability has limited the gas separation performance of polymeric membranes. Recently, researchers have found that the blending of glassy and rubbery polymers can effectively minimise trade-off between selectivity and permeability. Glassy poly(ethersulfone) (PES) and rubbery poly(ethylene) glycol (PEG) are polymers that are known to have a high affinity towards CO 2 . In this paper, PEG and PES are reviewed as potential polymer blend that can yield a final membrane with high CO 2 permeance and CO 2 /nitrogen (N 2 ) selectivity. Gas separation properties can be enhanced by using different solvents in the phase-inversion process. N-Methyl-2-Pyrrolidone (NMP) and Dimethylformamide (DMF) are common industrial solvents used for membrane fabrication. Both NMP and DMF are reviewed as prospective solvent blend that can improve the morphology and separation properties of PES/PEG blend membranes due to their effects on the membrane structure which increases permeation as well as selectivity. Thus, a PES/PEG blend polymeric membrane fabricated using NMP and DMF solvents is believed to be a major prospect for CO 2 /N 2 gas separation.
    Type of Medium: Online Resource
    ISSN: 1022-9760 , 1572-8935
    URL: Article
    DOI: 10.1007/s10965-021-02500-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2065616-6
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  • 6
    Online Resource
    Online Resource
    CO 2 adsorption of MSU-2 synthesized by using nonionic polyethyleneoxide (PEO)-based surfactants
    Informa UK Limited ; 2021
    In:  Chemical Engineering Communications Vol. 208, No. 4 ( 2021-04-03), p. 474-482
    Details
    In: Chemical Engineering Communications, Informa UK Limited, Vol. 208, No. 4 ( 2021-04-03), p. 474-482
    Type of Medium: Online Resource
    ISSN: 0098-6445 , 1563-5201
    URL: Article
    DOI: 10.1080/00986445.2019.1659785
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2021
    detail.hit.zdb_id: 187168-7
    detail.hit.zdb_id: 2040030-5
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  • 7
    Online Resource
    Online Resource
    Modified Zeolite/Polysulfone Mixed Matrix Membrane for Enhanced CO2/CH4 Separation
    MDPI AG ; 2021
    In:  Membranes Vol. 11, No. 8 ( 2021-08-16), p. 630-
    Details
    In: Membranes, MDPI AG, Vol. 11, No. 8 ( 2021-08-16), p. 630-
    Abstract: In recent years, mixed matrix membranes (MMMs) have received worldwide attention for their potential to offer superior gas permeation and separation performance involving CO2 and CH4. However, fabricating defect-free MMMs still remains as a challenge where the incorporation of fillers into MMMs has usually led to some issues including formation of undesirable interfacial voids, which may jeopardize the gas separation performance of the MMMs. This current work investigated the incorporation of zeolite RHO and silane-modified zeolite RHO (NH2–RHO) into polysulfone (PSf) based MMMs with the primary aim of enhancing the membrane’s gas permeation and separation performance. The synthesized zeolite RHO, NH2–RHO, and fabricated membranes were characterized by X-ray diffraction (XRD) analysis, Fourier transform infrared-attenuated total reflection (FTIR-ATR), thermogravimetric analysis (TGA) and field emission scanning election microscopy (FESEM). The effects of zeolite loading in the MMMs on the CO2/CH4 separation performance were investigated. By incorporating 1 wt% of zeolite RHO into the MMMs, the CO2 permeability and ideal CO2/CH4 selectivity slightly increased by 4.2% and 2.7%, respectively, compared to that of a pristine PSf membrane. On the other hand, a significant enhancement of 45% in ideal CO2/CH4 selectivity was attained by MMMs incorporated with 2 wt% of zeolite NH2-RHO compared to a pristine PSf membrane. Besides, all MMMs incorporated with zeolite NH2-RHO displayed higher ideal CO2/CH4 selectivity than that of the MMMs incorporated with zeolite RHO. By incorporating 1–3 wt% zeolite NH2-RHO into PSf matrix, MMMs without interfacial voids were successfully fabricated. Consequently, significant enhancement in ideal CO2/CH4 selectivity was enabled by the incorporation of zeolite NH2–RHO into MMMs.
    Type of Medium: Online Resource
    ISSN: 2077-0375
    URL: Article
    DOI: 10.3390/membranes11080630
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2614641-1
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  • 8
    Online Resource
    Online Resource
    Optimization of CO2/H2 Separation over Ba-SAPO-34 Zeolite Membrane Synthesized by Microwave Heating
    MDPI AG ; 2022
    In:  Membranes Vol. 12, No. 9 ( 2022-08-30), p. 850-
    Details
    In: Membranes, MDPI AG, Vol. 12, No. 9 ( 2022-08-30), p. 850-
    Abstract: CO2/H2 separation using membrane technology is an important research area in order to obtain high purity hydrogen as one source of clean energy. Finding a suitable inorganic membrane is one of the critical issues, which needs to be explored for CO2/H2 separation. In the present study, Ba-SAPO-34 zeolite membrane was synthesized and followed by a modification process. CO2/H2 separation of the membrane was investigated by varying the independent process variables (CO2 % in the feed, pressure difference across the membrane and temperature). Modeling and optimization for the responses (CO2/H2 separation selectivity and CO2 permeance) was performed by applying response surface methodology and central composite design, which is available in Design Expert software. The accuracy of the models in predicting the response was tested by comparing with the experimental value of response and the two values were in good agreement. The optimization of the models gave CO2 permeance of 19.23 × 10−7 mol/m2 s Pa and CO2/H2 separation selectivity of 11.6 at 5% CO2 in the feed, a pressure difference of 100 kPa, and temperature of 30 °C for Ba-SAPO-34 zeolite membrane.
    Type of Medium: Online Resource
    ISSN: 2077-0375
    URL: Article
    DOI: 10.3390/membranes12090850
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2614641-1
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  • 9
    Online Resource
    Online Resource
    Binding Stability of β-CD on MWCNTS: Role of Washing Cycle on the β-CD Coating
    Penerbit Universiti Sains Malaysia ; 2017
    In:  Journal of Physical Science Vol. 28, No. Suppl. 1 ( 2017-02-15), p. 145-153
    Details
    In: Journal of Physical Science, Penerbit Universiti Sains Malaysia, Vol. 28, No. Suppl. 1 ( 2017-02-15), p. 145-153
    Type of Medium: Online Resource
    ISSN: 1675-3402 , 2180-4230
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.21315/jps2017.28.s1
    DOI: 10.21315/jps
    DOI: 10.21315/jps2017.28.s1.9
    Language: Unknown
    Publisher: Penerbit Universiti Sains Malaysia
    Publication Date: 2017
    detail.hit.zdb_id: 2549008-4
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