OP-II-3

PP-III-52CATALYTIC UPGRADING OF PRODUCT GAS FROM GASIFICATIONOF COFFEE BEAN WASTE BY OLIVINE AND Ni/OLIVINEChiravoot Pechyen 1 , Duangduen Atong 2 , Duangdao Aht-Ong 3,4 ,and Viboon Sricharoenchaikul 51 Department of Packaging and Materials Technology, Faculty of Agro-Industry,Kasetsart University, Bangkok, 10900, Thailand2 National Metal and Materials Technology Center, Thailand Science Park,Pathumthani, 12120, Thailand3 Department of Materials Science, Faculty of Science, Chulalongkorn University,4 Research Unit of Advanced Ceramics and Polymeric Materials, National Center ofExcellence for Petroleum, Petrochemicals and Advanced Materials, ChulalongkornUniversity, Bangkok, 10330, Thailand5 Department of Environmental Engineering, Faculty of Engineering, ChulalongkornUniversity, Bangkok, 10330, Thailand, viboon.sr@chula.ac.thHydrogen is regarded as the energy for future with its cleanness and high calorificvalue and has become a focus of renewed interest in many parts of the world. Inpresent, most of hydrogen is generated in large scale from fossil fuel via steamreforming and gasification. These production pathways are not environmentallysound and economically viable solution and result in significant CO 2 emissions.Biomass energy has significant environmental benefits including lower emissions ofCO 2 and other greenhouse gases. However, one of the major issues in biomassgasification is tar formation. Tars are complex mixture of condensable hydrocarbonswhich include single ring to five ring aromatic compounds along with other oxygencontaining hydrocarbons. Tars may be eliminated by the use of catalystic crackingprocess. In this work, olivine based catalysts were prepared and tested for reformingof tar from gasification of coffee bean waste. The waste was collected from the MaeFah Luang Foundation under Royal Patronage (Doi Tung), Chiang Rai province,Thailand. Their particle sizes were between 0.4 to 0.5 mm with proximate andultimate analyses shown in Table 1.Table 1. Chemical characteristics of Coffee bean waste raw materialsProximate analysis (wt%) Ultimate analysis a (wt%) Chemical composition (wt%)Volatile 80.04 Carbon 50.80 Cellulose 40.64Fixed carbon 14.23 Hydrogen 6.40 Hemicellulose 25.91Ash 3.56 Nitrogen 3.10 Lignin 31.82Moisture 2.17 Oxygen b 39.70a Moisture and ash free. b By difference.Olivine may be an interesting support for nickel, giving a system with high attritionresistance and strong linking with nickel. The nickel/olivine catalyst was synthesized535