1. Department of Chemical EngineeringUniversiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
2. Department of Chemical EngineeringUniversity of Jeddah Jeddah 23890 Saudi Arabia
3. Department of Petroleum EngineeringUniversiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
4. Department of Industrial EngineeringUniversity of Jeddah Jeddah 23890 Saudi Arabia