Mohd Irfan Hatim Mohamed Dzahir
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Preferred name
Mohd Irfan Hatim Mohamed Dzahir
Official Name
Mohd Irfan Hatim, Mohamed Dzahir
Alternative Name
Mohamed Dzahir, Mohd Irfan Hatim
Dzahir, Mohd Irfan Hatim Mohamed
Mohamed Dzahir, Irfan Hatim
Dzahir, Mohd Irfan Hatim Mohd
Dzahir, M. I. H. M.
Main Affiliation
Scopus Author ID
36915087100
Researcher ID
ESY-2100-2022

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  • Publication
    One-pot synthesis of molecular-imprinted membrane for selective extraction of caffeic acid
    ( 2020-08-01)
    Azalina Mohamed Nasir
    ;
    Noorhidayah Ishak
    ;
    Said M.S.M.
    ;
    Mohd Irfan Hatim Mohamed Dzahir
    This research investigated the capabilities of caffeic acid-imprinted membrane (CA-IM) toward the selective extraction of caffeic acid (CA). A simpler surface-imprinted membrane using poly(vinylidene fluoride) as supporting membrane, CA as the template, ethylene glycol dimethacrylate as the cross-linker, and 4-vinylpyridine as the functional monomer was developed. The characterization of the membrane’s surface after the polymerization process was analyzed with Fourier transform infrared spectroscopy and a scanning electron microscope. Molecular modeling showed a ratio of 1:4 for which template/monomer gave the highest at − 18.09 kcal/mol. This indicates that this ratio can form a stable complex and a greater affinity toward CA. Batch rebinding and kinetics were performed and then followed by isotherm and kinetic adsorption modeling. Our results show that CA-IM fitted with Freundlich adsorption model and kinetic adsorption of CA-IM followed the second-order model. The selectivity experiment indicated that the adsorption capacity (1.497 mg/g), distribution coefficients, KD (1.939), and selectivity of polymers to CA were higher than for gallic acid and vanillic acid for CA-IM when compared to NIM. These results demonstrated that CA-IM is a capable and effective material for the selective adsorption and enrichment of CA compounds.
  • Publication
    Development of hydrophobic polymethylhydrosiloxane/tetraethylorthosilicate (PMHS/TEOS) hybrid coating on ceramic membrane for desalination via membrane distillation
    ( 2021-11-01)
    Tai Z.S.
    ;
    Othman M.H.D.
    ;
    Mustafa A.
    ;
    Ravi J.
    ;
    Wong K.C.
    ;
    Koo K.N.
    ;
    Hubadillah S.K.
    ;
    Azali M.A.
    ;
    Alias N.H.
    ;
    Ng B.C.
    ;
    Mohd Irfan Hatim Mohamed Dzahir
    ;
    Ismail A.F.
    ;
    Rahman M.A.
    ;
    Jaafar J.
    This study presents a facile approach to produce hydrophobic ceramic hollow fiber membranes (CHFMs) for membrane distillation (MD) desalination using the polymethylhydrosiloxane/tetraethylorthosilicate (PMHS/TEOS) hybrid material. The CHFM was modified via dip-coating with PMHS/TEOS hybrid solution followed by post-coating spinning to facilitate the formation of pores on the coating layer. The effects of ethanol and PMHS concentrations on the coating layer structure and hydrophobicity of the membranes were studied. CHFMs acquired hydrophobic properties after surface modification with the water contact angle values in the range of 108.2° to 124.1°. These membranes showed outstanding direct contact MD (DCMD) desalination performance with salt rejections of >99.98%. A flux of 6.7 L/m2h was achieved by the surface-modified CHFM when treating feed solution with a salinity of 35,000 ppm.
  • Publication
    Potential of 2-amino-2-methyl-1-propanol solution as absorbent for CO2 absorption from biogas
    ( 2021-05-24)
    Rajiman V.
    ;
    Hairul Nazirah Abdul Halim
    ;
    Shariff A.M.
    ;
    Ali U.F.M.
    ;
    Mohd Irfan Hatim Mohamed Dzahir
    Biogas is a source of clean energy that mainly consists of methane (CH4) and carbon dioxide (CO2). However, the presence of CO2 in biogas limits the heating value of the gas. Thus, biogas upgrading is a crucial process for reducing the CO2 content in raw biogas for purified biomethane production. Chemical absorption is a matured technology for CO2 removal process. The selection of chemical solvent with desirable characteristics is a substantial consideration for the effectiveness of the process. In this work, a potential solvent, 2-amino-2-methyl-1-propanol (AMP) was tested for the removal of CO2 from simulated biogas. The absorption process was conducted at different gas flow rates (22.1 kmol/m2.hr and 26.5 kmol/m2.hr) in a packed column at an operating pressure of 2 bars. The performance was evaluated in terms of percentage of CO2 removal along the column. It was found that the CO2 removal performance decreased by about 15 % at higher gas flow rates. Besides, the absorption efficiency of AMP was also compared with a well-established solvent, monoethanolamine (MEA). The experiment substantiated that 30 wt.% MEA effectively captured CO2 with 100 % removal as compared to 30 wt.% and 40 wt.% AMP with only 69 % and 87 % removal. In order to achieve high reaction rate for efficient CO2 removal, the addition of activator to form a blended amine solution with AMP was suggested to accelerate the CO2 absorption performance.
  • Publication
    Ceramic Membrane Distillation for Desalination
    ( 2020-10-01)
    Tai Z.S.
    ;
    Abd Aziz M.H.
    ;
    Othman M.H.D.
    ;
    Mohd Irfan Hatim Mohamed Dzahir
    ;
    Hashim N.A.
    ;
    Koo K.N.
    ;
    Hubadillah S.K.
    ;
    Ismail A.F.
    ;
    A Rahman M.
    ;
    Jaafar J.
    Membrane distillation (MD) is a thermally driven membranous process and in the recent years, it has received increasing attention in desalination. Generally, polymeric membranes have dominated the MD studies due to their intrinsic hydrophobic properties and high availability. On the other hand, the development of ceramic membranes for MD desalination is developing, gradually replacing their polymeric counterparts due to superior properties in terms of thermal, chemical and mechanical stabilities, as well as potentially longer service terms. This review describes and evaluates the fabrication methods of ceramic membranes as well as discusses the latest discoveries of ceramic membranes for MD desalination. Despite outstanding properties, the efforts in developing ceramic membranes as a replacement for polymeric membranes in MD desalination are meeting challenges and obstacles; hence, in the last part of this article, the current challenges and future research opportunities of ceramic membrane development will also be addressed.
  • Publication
    Preparation of supported-deep eutectic solvent membranes: Effects of bath medium composition on the structure and performance of supported-deep eutectic solvent membrane for CO2/N2 gas separation
    ( 2020-05-01)
    Amira Mohd Nasib
    ;
    Mohd Irfan Hatim Mohamed Dzahir
    ;
    Nora Jullok
    ;
    Mohamad Syahmie Mohamad Rasidi
    Polyvinylidene fluoride-co-polytetrafluoroethylene, PVDF-co-PTFE polymer was used as a membrane support. The asymmetric membranes were formed by immersion of casted membrane film into the coagulation bath. This work manipulated the coagulant bath medium by mixing ethanol with distilled water at different weight percentages (0, 25 and 50 wt. % of ethanol). The structures of fabricated membranes were observed to have different morphologies. Higher ethanol content altered the membrane structure from finger-like to sponge-like structure, and hence differed in membrane porosity. Vacuum-based technique was chosen to impregnate the deep eutectic solvent (DES) into the pores of membrane support. DES was prepared by mixing choline chloride (ChCl) and ethylene glycol at a ratio of 1:3. Scanning electron microscopy (SEM) was used to study the membrane morphology changes while in order to determine the immobilization of DES, energy dispersive X-ray (EDX) analysis was used. The porosity of fabricated PVDF-co-PTFE membrane was determined by means of gravimetric method. Lastly, the membrane separation performance using CO2 and N2 gasses were used to determine the capability of the supported-DES-membrane. The results demonstrated the highest immobilization of DES in supported membrane pores was achieved when combination of 25 wt. % of ethanol and 75 wt. % distilled water was used as a coagulant bath medium. The respective membrane has 74.5% porosity with the most excellent performance of CO2 separation at 25.5 x 103 GPU with CO2/N2 selectivity of 2.89.
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