Mohamad Wijayanuddin Ali

Mathematical modeling of a single stage ultrasonically assisted distillation process.

The ability of sonication phenomena in facilitating separation of azeotropic mixtures presents a promising approach for the development of more intensified and efficient distillation systems than conventional ones. To expedite the much-needed development, a mathematical model of the system based on conservation principles, vapor-liquid equilibrium and sonochemistry was developed in this study. The model that was founded on a single stage vapor-liquid equilibrium system and enhanced with ultrasonic waves was coded using MATLAB simulator and validated with experimental data for ethanol-ethyl acetate mixture. The effects of both ultrasonic frequency and intensity on the relative volatility and azeotropic point were examined, and the optimal conditions were obtained using genetic algorithm. The experimental data validated the model with a reasonable accuracy. The results of this study revealed that the azeotropic point of the mixture can be totally eliminated with the right combination of sonication parameters and this can be utilized in facilitating design efforts towards establishing a workable ultrasonically intensified distillation system.

Current status on hydrogen production technology by using oil palm empty fruit bunch as a feedstock in Malaysia

In Malaysia, the growth of economic is connected to the fossil energy resources which are continued to effect by the growing of energy demand. Hydrogen is an alternative for energy and electricity generation, especially for transportation application and can significantly reduce the carbon monoxide (CO) emission and air pollution. The research on renewable energy especially from biomass such as oil palm empty fruit bunch (OPEFB) can contributes to reduce the concern over the energy insecurity and will help Malaysia in creating a sustainable energy supply. Research on the hydrogen production process by using OPEFB was reported in several papers. However, the review criteria and the best technology for hydrogen production process application are still missing. This paper attempts to develop hydrogen technology database from various types of hydrogen production process of OPEFB. It can be used to determine the most feasible and promising route to be applied. This study is also significant in helping the industry to see the differences of various design alternatives and make process design decisions on them.