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Articles by K.S.N. Kamarudin
Total Records ( 4 ) for K.S.N. Kamarudin
  M.F. Mohamad , K.S.N. Kamarudin , N.N.F. Nik Mohamed Fathilah and M.S. Mohamed
  Mercury is a natural occurring element and present in various concentrations in natural gas. Mercury is not only hazardous to human health and the environment but could also attack equipment components resulting in mechanical failure and gas leakage. This paper describes the preparation of various sizes and shapes of Au nanoparticles for mercury adsorption by using a microwave (MW)-polyol method in the presence of different polyvinylpyrrolidone (PVP) concentrations (1.9, 3.8 and 5.7 mM) as a polymer surfactant. Mixtures of spherical, triangular, hexagonal, octahedral, decahedral and icosahedral particles were obtained using this rapid method. Sizes and shapes was found strongly depend on the concentrations of PVP. Large spherical particles were the major product of PVP concentrations (1.9 and 3.8 mM), whereas small spherical particles were preferentially produced at the highest PVP concentration (5.7 mM). It should be noted that the polygonal particles also increases with increasing PVP concentrations. The amount of mercury adsorbed using 10 ppm mercury solution is the highest (7.2%) for PVP concentration of 5.7 mM. It is concluded that PVP concentrations affects the formation of sizes and shapes of Au nanoparticles thus affects the mercury adsorption. The present result provides new information about mercury adsorption on Au nanoparticles.
  S.N. Suahadah and K.S.N. Kamarudin
  Aqueous Monoethanolamine (MEA) is widely used as the Carbon dioxide (CO2) absorbent in process industries. Recent technology has shown that a mixture of MEA with other amines can enhance its capability as CO2 absorbent. The addition of 2-amino-2-methyl-1-propanol (AMP) into aqueous phase containing MEA was reported in this study. The aqueous solution was homogenized with the organic solution containing kerosene and Span-80 to produce Emulsion Liquid Membrane (ELM). Rotating disc contactor was used in the CO2 absorption process to maintain the stability of the emulsion. 55.17% of CO2 was removed when 8 mL of MEA was used in the aqueous phase whereas when 8 mL AMP was used, only 41.72% of CO2 was removed. On the other hand, CO2 percentage removal increased to 60.72% when 2 mL of AMP was added into the ELM that containing 6 mL of MEA. Stability of the MEA/AMP mixture ELM after 24 h was 89%. The results indicate that a mixture of MEA/AMP is stable and can enhance the CO2 removal.
  N. Zaini and K.S.N. Kamarudin
  Kenaf is a green engineering material that has a great potential to be used as CO2 adsorbent. To enhance the capability of kenaf core as CO2 adsorbent, it should be cleaned and modified via various kinds of treatments. Prior to treatment process, the sample should be cleaned to remove all the adherent extraneous matters. In this study, kenaf core sample has been cleaned by using different types of cleaning methods such as using distilled water at room and boiling water, NaOH solution and HCl solution. This study revealed that the cleaning by using distilled water at room temperature is the most efficient way as compared to other methods. Scanning Electron Microscope (SEM) carried out showed that the surface of kenaf core after cleaned by using distilled water at room temperature indicates an open cylindrical channel with similar size of honeycomb shape gaps that is beneficial to provide an active site for CO2 to be trapped or adsorbed. CO2 adsorption study conducted in Pressure Swing Adsorption (PSA) column showed that kenaf core sample after cleaning by using distilled water at room temperature could adsorb CO2 up to 84.45% and relatively higher than the other methods. This study also revealed that 5 min is sufficient for adsorption to take place. Further increase in the adsorption time does not indicate any significant change to the percentage of CO2 adsorption. The future works may involve a treatment and modification of kenaf core to enhance the CO2 adsorption process.
  N. Dolmat , K.S.N. Kamarudin and S.H. Paiman
  Removal of carbon dioxide (CO2) becomes necessary in order to save the environment and to prevent problems in chemical process such as corrosion of pipeline and equipment, catalyst poisoning and freezing in the cryogenic equipment. Absorption of carbon dioxide in emulsion containing active extractant becomes an alternative method since the formation of emulsion reduces the corrosion problem. In addition, the droplets of amine provide large surface area for reaction to occur. In this study, the emulsion of liquid membrane that consist of extractant (N-Methyldiethanolamine) and piperazine were used to enhance the CO2 absorption rate. Piperazine was used because it had fast reaction rate with carbon dioxide and high capability or solubility for carbon dioxide absorption. This paper compares different emulsion liquid membrane formulation for CO2 removal using emulsion containing amine (N-Methyldiethanolamine) and piperazine. This study is based on the stability of the emulsion and CO2 absorption performance of the emulsion. The emulsion was prepared at different concentration of extractants. The CO2 absorption was carried in Rotating Disc Contactor (RDC) and Gas Chromatography (GC) was used to determine the amount of CO2 absorbed. From this research, emulsion containing 2 mL N-Methyldiethanolamine and 6 mL piperazine has the highest percentage of stability and CO2 removal.
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