title: Catalytic upgrading of pyrolysis vapors from Jatropha wastes using alumina, zirconia and titania based catalysts.
abstract: The objective of this study was to catalytically upgrade bio-oil from organic vapors of Jatropha wastes using Py-GC/MS. Catalytic testing included Al2O3, ZrO2, TiO2 (rutile, T1) and TiO2 (anatase, T2) supporter catalysts modified with transition metals (Pd, Ru or Ni) by impregnation method. In non-catalytic runs, the main vapor products were fatty acids (60.74%). With the presence of Al2O3 based catalysts, carboxylic acids were obviously reduced to 0.76-19.61% while hydrocarbons were the main products (42.00-64.06%). Comparing among four supporters, total hydrocarbon yields increased with presence of all catalysts. Higher yields were obtained by T2>Al2O3>CA>NiCA>RuCA catalysts. Al2O3 and T2 supports were the most effective for increased hydrocarbons while decreased oxygenated compounds (15%) which is one of the primary aims of this study. The result indicating that high surface area resulted in better catalytic activity but also adversely promoted N-compounds. Therefore these catalysts can be applied to improve properties of pyrolytic products.
authors.affiliation: Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.
authors.forename: P
authors.initials: P
authors.lastname: Kaewpengkrow
authors.affiliation: National Metal and Materials Technology Center, Pathumthani, Thailand.
authors.forename: D
authors.initials: D
authors.lastname: Atong
authors.affiliation: Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand; Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University, Bangkok, Thailand. Electronic address: viboon.sr@chula.ac.th.
authors.forename: V
authors.initials: V
authors.lastname: Sricharoenchaikul
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D005740:Gases / Q000737:chemistry*; D006358:Hot Temperature; D031286:Jatropha; D014025:Titanium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D005740:Gases; D015040:Zirconium; D014025:Titanium; D000537:Aluminum Oxide; C028541:zirconium oxide
keywords: Catalyst; Jatropha wastes; Pyrolysis vapors; Upgrading