title: Fluid bed gasification--plasma converter process generating energy from solid waste: experimental assessment of sulphur species.
abstract: Often perceived as a Cinderella material, there is growing appreciation for solid waste as a renewable content thermal process feed. Nonetheless, research on solid waste gasification and sulphur mechanisms in particular is lacking. This paper presents results from two related experiments on a novel two stage gasification process, at demonstration scale, using a sulphur-enriched wood pellet feed. Notable SO2 and relatively low COS levels (before gas cleaning) were interesting features of the trials, and not normally expected under reducing gasification conditions. Analysis suggests that localised oxygen rich regions within the fluid bed played a role in SO2's generation. The response of COS to sulphur in the feed was quite prompt, whereas SO2 was more delayed. It is proposed that the bed material sequestered sulphur from the feed, later aiding SO2 generation. The more reducing gas phase regions above the bed would have facilitated COS--hence its faster response. These results provide a useful insight, with further analysis on a suite of performed experiments underway, along with thermodynamic modelling.
authors.affiliation: Department of Chemical Engineering, University College London, London WC1E 7JE, United Kingdom; Advanced Plasma Power, Swindon, Wiltshire SN3 4DE, United Kingdom. Electronic address: shane.morrin@ucl.ac.uk.
authors.forename: Shane
authors.initials: S
authors.lastname: Morrin
authors.forename: Paola
authors.initials: P
authors.lastname: Lettieri
authors.forename: Chris
authors.initials: C
authors.lastname: Chapman
authors.forename: Richard
authors.initials: R
authors.lastname: Taylor
mesh_terms: D004736:Energy-Generating Resources; D005740:Gases / Q000032:analysis; D012037:Refuse Disposal / Q000295:instrumentation / Q000379:methods*; D062611:Solid Waste; D013455:Sulfur; D013458:Sulfur Dioxide; D014934:Wood
chemical_list: D005740:Gases; D062611:Solid Waste; D013458:Sulfur Dioxide; D013455:Sulfur
keywords: APP; Advanced Plasma Power Ltd.; BFB; EPSRC; EngD; Engineering Doctorate; Exp.; Fluidised; Gasification; ID; MSW; Model; PC; Plasma; RDF; SCADA; Sulphur; Supervisory Control and Data Acquisition; UK Engineering and Physical Sciences Research Council; UN; United Nations; W; WA; Waste; bubbling fluidised bed; experiment; induced draft; municipal solid waste; plasma converter; refuse derived fuel; sulphuric acid treated wood pellets; wood pellets