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Articles by S.K. Kamarudin
Total Records ( 3 ) for S.K. Kamarudin
  S.L. Ho , S.K. Kamarudin , W.R.W. Daud and Z. Yaakub
  The design, fabrication and performance evaluation of a passive direct methanol fuel cell (DMFC) operated at ambient condition with an active area of 7.5 cm2 is studied in this research. The fuel cell is air-breathing and passive without any external pumps or auxiliary devices. Oxygen is taken from the surrounding air and methanol is stored in a built-in reservoir at the anode side. It was tested with methanol of various concentrations, ranging from 1 to 5 M. It was found that cell performance improved with higher methanol concentrations. Power density of 3.5 mW cm-2 was achieved with 4 M methanol at a voltage of 0.2 V. This study also presents the performance of the cell tested for different types of design assemble and current collector. The main contribution of this study is the ideas and possibilities in fabrication of micro DMFC in component assemble point of view in order to enhance the power performance and all the possibilities was proofed with data from experiments.
  M.S. Takriff , N.H. Mansor and S.K. Kamarudin
  The chemical industry has undergone significant transformation during the past 25 years due to the increased cost of energy, increasingly stringent environmental regulations and global competition in product pricing and quality. The main objective of a process design is to create a process that is economical, safe, and environmentally benign throughout the whole lifetime of the plant. One of the most important engineering tools for addressing these issues is optimization. Modifications in plant design and operating procedures have been implemented to reduce costs and meet constraints, with an emphasis on improving efficiency and increasing profitability by using computer integrated manufacturing, or CIM. To apply optimization effectively in processing plant, both theory and practice of optimization must be understood. Appropriate meshing of the optimization technique and the model are essential for success in optimization. Over the last 10 years much effort has been devoted to the study of optimization strategies of either selected sections or entire chemical plant involving both continuous and integer variables. Several algorithms have been proposed and large numbers of research applications have been presented. However, only a few applications have been reported with process simulation. This study presents a review of the concepts/application of optimization techniques. In addition, it discusses optimization software and process simulator that offers the most potential for successful and reliable results.
  A.Y. Musa , A.A.H. Kadhum , A.B. Mohamad , M.S. Takriff , S.K. Kamarudin and A.R. Daud
  The corrosion rate for mild steel in 2.5 M H2SO4 at 30°C for different flow velocities was determined. Electrochemical techniques such as Tafel polarization and electrochemical impedance spectroscopy (EIS) were carried out to study the effects of flow velocity on corrosion rate of mild steel. The turbulent conditions experiments were simulated using rotating cylinder electrode (RCE). Results obtained from Tafel polarization and EIS were in good agreement. The study revealed that the mild steel corrosion rate decreased with increases in flow velocity due to improvement of the passivation by an increase of the oxygen supply. Corrosion potentials were shafted toward the cathodic values and the magnitude of the impedance was rose with flow velocities.
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