Zamri Abdullah
Universiti Teknologi PETRONAS, Chemical Engineering, Faculty Member
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The waste shell of Anadara granosa or blood cockle is utilized as an alternative source for calcium carbonate (CaCO3) in the synthesis of calcium chloride (CaCl2) as a dehumidifier. In this paper, the synthesis of CaCl2 from the waste... more
The waste shell of Anadara granosa or blood cockle is utilized as an alternative source for calcium carbonate (CaCO3) in the synthesis of calcium chloride (CaCl2) as a dehumidifier. In this paper, the synthesis of CaCl2 from the waste shell was investigated at various concentrations of HCl reactant and the shells’ particle sizes to determine the optimum yield. The synthesized CaCl2 was further tested on its capacity in adsorbing moisture and compared with the commercially available dehumidifier. It was found that concentration of HCl at 5 M produced the highest yield, while the particle size of 0.5 mm took the shortest period in producing CaCl2 from the waste shells of Anadara granosa. Investigating the performance as dehumidifier in a controlled environment, synthesized CaCl2 showed similar capacity in sorbing moisture as the commercially-available dehumidifier, proving the high potential of the waste shells of Anadara granosa to serve as a green alternative for CaCO3 in producing CaCl2.
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Research Interests:
A rupture or puncture of a carbon dioxide (CO2) pipeline results in a release of dense CO2 gas cloud mixed with toxic impurities such as hydrogen sulfide (H2S) to the ambient. This paper has proposed an approach for developing an accurate... more
A rupture or puncture of a carbon dioxide (CO2) pipeline results in a release of dense CO2 gas cloud mixed with toxic impurities such as hydrogen sulfide (H2S) to the ambient. This paper has proposed an approach for developing an accurate consequence model for CO2 release containing H2S in order to demonstrate a safe layout and other safeguards. Thus, a validated code using computational fluid dynamics (CFD) was applied to predict time-varying concentrations of CO2 and H2S at a point of downwind release area. Then overall fatality rate due to both CO2 and H2S has been estimated at this point. Results indicate that this is a suitable method for assessing the consequences of the release of CO2 via pipeline leakage.
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ABSTRACT This paper investigates a new route for intensification of methyl ester synthesis in Malaysia via alkalicatalysed transesterification of waste cooking oil derived from palm olein using a hydrodynamic cavitation reactor. The... more
ABSTRACT This paper investigates a new route for intensification of methyl ester synthesis in Malaysia via alkalicatalysed transesterification of waste cooking oil derived from palm olein using a hydrodynamic cavitation reactor. The effects of the oil to methanol molar ratio (1:4–1:7), catalyst loading concentration (0.5–1.25 wt%) and reaction temperature (50–65 C) have been investigated using an optimised plate with 21 holes of 1 mm diameter and an inlet pressure of 2 bar in a 50 L of hydrodynamic cavitation reactor assisted by a double diaphragm pump. Optimal conversion of 98.1% was achieved in 15 min in a hydrodynamic cavitation reactor with 1:6 molar ratio of oil to methanol, 1 wt% of catalyst and 60 C of reaction temperature. It has been observed that a significant reduction in the optimum reaction time (about 6 fold) for transesterification from 90 min for mechanical stirring approach to 15 min for the hydrodynamic cavitation approach. Optimal yield efficiency of 12.50 �10�4 g/J was found using hydrodynamic cavitation and it was 8 fold higher than 1.5 �10�4 g/J when mechanical stirring was used.
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Research Interests:
Research Interests:
ABSTRACT The following study involves the investigation of hydrodynamics inside the packed column both at laboratory scale which is HPVA high pressure adsorption analyzer chamber and pilot scale. The simulations are performed in ANSYS... more
ABSTRACT The following study involves the investigation of hydrodynamics inside the packed column both at laboratory scale which is HPVA high pressure adsorption analyzer chamber and pilot scale. The simulations are performed in ANSYS FLUENT14. Velocity variation due to porous media along with the pressure gradient for different adsorbent particle sizes and varying flow rates are obtained and compared for both the scales. Simulation is based on the criterion which identifies the emergence of non-Darcy flow.
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Research Interests:
Research Interests:
ABSTRACT A rupture or puncture of a carbon dioxide (CO2) pipeline will result in a release of dense CO2 gas cloud mixed with toxic impurities such as hydrogen sulfide (H2S) to the ambience. This paper has proposed an approach for... more
ABSTRACT A rupture or puncture of a carbon dioxide (CO2) pipeline will result in a release of dense CO2 gas cloud mixed with toxic impurities such as hydrogen sulfide (H2S) to the ambience. This paper has proposed an approach for developing an accurate consequence model for CO2 release containing H2S in order to demonstrate a safe layout and other safeguards. Thus, a validated code using computational fluid dynamics (CFD) was applied to predict time-varying concentrations of CO2 and H2S at a point of downwind release area. Then overall fatality rate due to both CO2 and H2S has been estimated at this point. Results indicate that this is a suitable method for assessing the consequences of the release of CO2 via pipeline leakage.
Research Interests:
ABSTRACT Abstract: Carbon Capture and Storage (CCS) is an alternative for decreasing greenhouse gas (GHG) emissions by removing carbon dioxide (CO2) from power plants. Accidental discharges from CCS plant will result in a release of dense... more
ABSTRACT Abstract: Carbon Capture and Storage (CCS) is an alternative for decreasing greenhouse gas (GHG) emissions by removing carbon dioxide (CO2) from power plants. Accidental discharges from CCS plant will result in a release of dense CO2 gas cloud to the ambience at high concentration which becomes a dominated threat to human health. However, there is a knowledge gap in assessing the release of CO2 via pipeline leakage. Thus, it is necessary to develop an accurate consequence model for CO2 release in order to demonstrate a safe layout and other safeguards. In this study, pure CO2 discharge and dispersion have been detailed out using a three-dimension model with presence of obstacles in a Computational Fluid Dynamics (CFD) software. The realizable κ-ε turbulence model was chosen for simulating the dispersion of pure CO2-air. A case study based on Kit Fox gas experiments of pure CO2 instantaneous release is developed to evaluate the discharge scenario. The results obtained from the model are compared with experimental data available in literatures and validation is achieved.