title: Experimental investigation of synthetic gas composition in a two-stage fluidized bed gasification process: effect of activated carbon as bed material.
abstract: In this study, a two-stage fluidized bed gasifier was used to investigate the effect of the equivalence ratio (ER) and steam/biomass ratio (S/B) on the synthetic gas distribution while activated carbon (AC) was added as the bed material in secondary gasifier (Stage II). The experimental results showed that when the empty bed (without the bed material) was used for the Stage II reaction, the hydrogen (H2) content in the synthetic gas emitted from the Stage II reactor was 2-3 mol% higher than that from the first-stage gasifier (Stage I). It was supposed that using the Stage II reactor prolongs the reaction time and thereby increases the H2production. Besides, when the AC was added in the Stage II gasifier, the H2concentration, the total gas yield, and gas heating value reached their maximum (30 mol%) when ER and S/B were 0.3 and 1.5, respectively.
authors.affiliation: a Institute of Environmental Health and Pollution Control and School of Environmental Science and Engineering , Guangdong University of Technology , Guangzhou , People's Republic of China.
authors.forename: Jia-Hong
authors.initials: JH
authors.lastname: Kuo
authors.affiliation: b Department of Civil and Environmental Engineering , National University of Kaohsiung , Kaohsiung , Taiwan.
authors.forename: Chiou-Liang
authors.initials: CL
authors.lastname: Lin
authors.affiliation: b Department of Civil and Environmental Engineering , National University of Kaohsiung , Kaohsiung , Taiwan.
authors.forename: Tsung-Jen
authors.initials: TJ
authors.lastname: Chang
authors.affiliation: b Department of Civil and Environmental Engineering , National University of Kaohsiung , Kaohsiung , Taiwan.
authors.forename: Wang-Chang
authors.initials: WC
authors.lastname: Weng
authors.affiliation: a Institute of Environmental Health and Pollution Control and School of Environmental Science and Engineering , Guangdong University of Technology , Guangzhou , People's Republic of China.
authors.forename: JingYong
authors.initials: J
authors.lastname: Liu
mesh_terms: D056804:Biofuels / Q000032:analysis*; D018533:Biomass; D002606:Charcoal / Q000737:chemistry*; D003246:Conservation of Energy Resources / Q000379:methods*; D013227:Steam / Q000032:analysis
chemical_list: D056804:Biofuels; D013227:Steam; D002606:Charcoal
keywords: Biomass; activated carbon; fluidized bed; gasification; synthetic gas