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Articles by Lee Chung Lau
Total Records ( 2 ) for Lee Chung Lau
  Zheng Yong Gan and Lee Chung Lau
  Due to large amount of biogas produced from anaerobic digestion of palm oil mill effluent, it has great potential to be used as a renewable energy in Malaysia. Before biogas can combusted, removal of impurities such as carbon dioxide is essentially necessary. However, the lack of detailed study on the process conditions and economics has restrained the deployment of this technology in this country. Therefore in this study, biogas upgrading process using pressure swing adsorption technology is simulated and optimized to minimize the payback period of initial investment. The study showed that operating pressure, residence time and flow rate were the most significant parameters. The optimized process conditions were obtained at 7.5 bar operating pressure, 450 m3/h flow rate, 2.125 m bed length and 0.389 h residence time. The corresponding biogas methane content and payback period were 98% and 3.135 years, respectively. Comparing to other study, the optimized result showed great potential to deploy this technology in Malaysia.
  Nur Jasma Izzerin Jamaludin , Mohamad Azrul Hakasah , Sumathi Sethupathi and Lee Chung Lau
  Climate change issue has received global attention for several decades. In the pledge to reduce 40% of Carbon dioxide (CO2) emission by Gross Domestic Product (GDP) intensity, Malaysia exhibits active participation in the global effort to reduce CO2 emission. Among various economic activities, transportation sector appears to be the largest emitter that requires particular attention, especially, due to its increasing rate under population growth scenario. Therefore, this study analyzed the CO2 emission data in the transportation sector and discussed energy policy and project specifically designed for transportation sector to achieve the goal. Projects such as use of B5 biofuel, Putrajaya Green city and enhanced rail transportation were planned and implemented in order to achieve the required transportation sector CO2 emission reduction from 77.61 to 69.33 Mtonnes annually. Comparison with other countries in term of energy policy in transportation sector was conducted. Several recommendations on how the nation can further improve her reduction strategies were also discussed.
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