1. Department of Chemical Engineering, School of Engineering and Technology, Walailak University, Nakhon Si Thammarat 80160, Thailand
2. Biomass and Oil Palm Research Centre of Excellence, Walailak University, Nakhon Si Thammarat 80160, Thailand
3. Engineering Graduate Program, Walailak University, Nakhon Si Thammarat 80160, Thailand
4. Faculty of Industrial Technology, Nakhon Si Thammarat Rajabhat University, Nakhon Si Thammarat 80000, Thailand