1. Department of Chemical Engineering, Faculty of EngineeringUniversity of Malaya 50603, Kuala Lumpur Malaysia
2. Department of Chemistry, Faculty of ScienceUniversity of Malaya 50603, Kuala Lumpur Malaysia
3. Department of Mechanical Engineering, Faculty of EngineeringUniversity of Malaya 50603, Kuala Lumpur Malaysia
4. Department of Mechanical Engineering, Faculty of EngineeringNational Chung Cheng University Chiayi County, 62102 Taiwan