1. Department of Environment, Faculty of Environmental Culture and Ecotourism, Srinakharinwirot University, Bangkok 10110, Thailand
2. Patumwan Demonstration School, Srinakharinwirot University, Bangkok 10330, Thailand
3. Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
4. Center of Fuels and Energy from Biomass, Chulalongkorn University, Kaengkhoi, Saraburi18110, Thailand