Fluidized bed gasification of waste-derived fuels.
Five alternative waste-derived fuels obtained from municipal solid waste and different post-consumer packaging were fed in a pilot-scale bubbling fluidized bed gasifier, having a maximum feeding capacity of 100 kg/h. The experimental runs utilized beds of natural olivine, quartz sand or dolomite, fluidized by air, and were carried out under various values of equivalence ratio. The process resulted technically feasible with all the materials tested. The olivine, a neo-silicate of Fe and Mg with an olive-green colour, has proven to be a good candidate to act as a bed catalyst for tar removal during gasification of polyolefin plastic wastes. Thanks to its catalytic activity it is possible to obtain very high fractions of hydrogen in the syngas (between 20% and 30%), even using air as the gasifying agent, i.e. in the most favourable economical conditions and with the simplest plant and reactor configuration. The catalytic activity of olivine was instead reduced or completely inhibited when waste-derived fuels from municipal solid wastes and aggregates of different post-consumer plastic packagings were fed. Anyhow, these materials have given acceptable performance, yielding a syngas of sufficient quality for energy applications after an adequate downstream cleaning.
Arena
Umberto
U
Department of Environmental Sciences, Second University of Naples, Via A. Vivaldi 43, Caserta, Italy. umberto.arena@unina2.it
Zaccariello
Lucio
L
Mastellone
Maria Laura
ML
D002119:Calcium Carbonate / Q000737:chemistry; D002384:Catalysis; D004736:Energy-Generating Resources / Q000145:classification; D058085:Iron Compounds / Q000737:chemistry; D008274:Magnesium / Q000737:chemistry; D017616:Magnesium Compounds / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods*; D017640:Silicates / Q000737:chemistry; D013638:Tars / Q000737:chemistry; D014866:Waste Products / Q000032:analysis / Q000145:classification
D058085:Iron Compounds; D017616:Magnesium Compounds; D017640:Silicates; D013638:Tars; D014866:Waste Products; C034475:olivine; D002119:Calcium Carbonate; D008274:Magnesium; C028042:calcium magnesium carbonate