1. Department of Chemical and Petroleum Engineering UCSI University Kuala Lumpur Cheras 56000 Malaysia
2. Chemical Engineering Department Universiti Teknologi PETRONAS Perak Seri Iskandar 32610 Malaysia
3. Department of Petrochemical Engineering Universiti Tunku Abdul Rahman Perak Kampar 31900 Malaysia
4. Department of Materials Engineering Tunku Abdul Rahman University College Kuala Lumpur Wilayah Persekutuan 53300 Malaysia