Department of Environmental Sciences, Second University of Naples, Via A. Vivaldi 43, Caserta, Italy.
Waste Manag. 2010 Jul;30(7):1212-9. doi: 10.1016/j.wasman.2010.01.038. Epub 2010 Feb 21.
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.
五种来自城市固体废物和不同消费后包装的替代废物衍生燃料被送入一个中试规模的鼓泡流化床气化炉中，该气化炉的最大进料能力为 100 公斤/小时。实验运行使用空气流化的天然橄榄石、石英砂或白云石床进行，并在不同当量比下进行。所有测试的材料都证明该工艺在技术上是可行的。橄榄石是一种橄榄绿色的 Fe 和 Mg 的新硅酸盐，已被证明是一种很好的候选物，可以在聚烯烃塑料废物的气化过程中作为床催化剂去除焦油。由于其催化活性，可以在合成气中获得非常高的氢气分数（20%至 30%之间），甚至可以使用空气作为气化剂，即在最有利的经济条件下，采用最简单的工厂和反应器配置。然而，当使用来自城市固体废物和不同消费后塑料包装的集料的废物衍生燃料时，橄榄石的催化活性会降低或完全抑制。无论如何，这些材料的性能都可以接受，在进行适当的下游净化后，产生的合成气质量足以用于能源应用。
