Fluidized bed gasifiers (FBGs) and gas engines (GEs) could be available as waste-to-energy technology, because most small- and medium-scale municipal solid waste treatment plants have low electricity generation efficiencies. As feedstock composition vary widely based on regional characteristics, clarifying the relationship between gas and tar generation behaviors and feedstock is useful for the design of the GE generation process to predict gas and tar yields and compositions. To understand the synergistic effect of feedstock characteristics in fluidized bed gasification, flash pyrolysis of wood pellet, polyethylene, and polypropylene at 900 °C was conducted. Yields and compositions of gasses and tar from single and co-pyrolysis were investigated. The results reveal that co-pyrolysis increases the gas yield because of oxygenates and moisture present in the wood pellet. Tar yields found to decrease while polycyclic aromatic hydrocarbons (PAHs) are not reduced even during co-pyrolysis. That is because most chain hydrocarbons of tar are converted to C_mH_n gases and PAHs.

中文翻译：

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木材颗粒和塑料快速热解过程中气体和焦油的生成行为

流化床气化炉（FBG）和燃气发动机（GE）可以用作废物转化为能源的技术，因为大多数中小型市政固体废物处理厂的发电效率都很低。由于原料的组成因区域特性而异，因此澄清气体和焦油生成行为与原料之间的关系对于设计GE生成工艺以预测气体和焦油的收率和组成非常有用。为了了解原料特性在流化床气化中的协同作用，在900°C下对木屑，聚乙烯和聚丙烯进行了快速热解。研究了单热解和共热解的气体和焦油的收率和组成。结果表明，由于木颗粒中存在的氧化物和水分，共热解提高了气体产量。发现焦油产率降低，而多环芳烃（PAH）甚至在共热解过程中也没有降低。那是因为焦油的大多数链状烃都转化为C_m H _n气体和多环芳烃。