title: Taguchi approach for co-gasification optimization of torrefied biomass and coal.
abstract: This study employs the Taguchi method to approach the optimum co-gasification operation of torrefied biomass (eucalyptus) and coal in an entrained flow gasifier. The cold gas efficiency is adopted as the performance index of co-gasification. The influences of six parameters, namely, the biomass blending ratio, oxygen-to-fuel mass ratio (O/F ratio), biomass torrefaction temperature, gasification pressure, steam-to-fuel mass ratio (S/F ratio), and inlet temperature of the carrier gas, on the performance of co-gasification are considered. The analysis of the signal-to-noise ratio suggests that the O/F ratio is the most important factor in determining the performance and the appropriate O/F ratio is 0.7. The performance is also significantly affected by biomass along with torrefaction, where a torrefaction temperature of 300°C is sufficient to upgrade eucalyptus. According to the recommended operating conditions, the values of cold gas efficiency and carbon conversion at the optimum co-gasification are 80.99% and 94.51%, respectively.
authors.affiliation: Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan, ROC. weihsinchen@gmail.com
authors.forename: Wei-Hsin
authors.initials: WH
authors.lastname: Chen
authors.forename: Chih-Jung
authors.initials: CJ
authors.lastname: Chen
authors.forename: Chen-I
authors.initials: CI
authors.lastname: Hung
mesh_terms: D056804:Biofuels / Q000032:analysis; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000378:metabolism; D002245:Carbon Dioxide / Q000032:analysis; D002248:Carbon Monoxide / Q000032:analysis; D003031:Coal / Q000032:analysis*; D005052:Eucalyptus / Q000737:chemistry; D005740:Gases / Q000737:chemistry*; D006358:Hot Temperature; D006859:Hydrogen / Q000032:analysis; D059629:Signal-To-Noise Ratio; D013227:Steam
chemical_list: D056804:Biofuels; D003031:Coal; D005740:Gases; D013227:Steam; D002245:Carbon Dioxide; D002244:Carbon; D002248:Carbon Monoxide; D006859:Hydrogen
keywords: Biomass and coal co-gasification; Entrained flow gasifier; Gasification optimization; Taguchi method; Torrefaction