1. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia
2. Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia
3. Energy and Environment Unit, Engineering and Processing Research Division, Malaysian Palm Oil Board (MPOB), Selangor, Kajang, Malaysia