Co‐gasification of wood mixed with 20% (mass fraction) of polyethylene (PE) in a two‐stage NOTAR^® fixed‐bed gasifier was studied in the present paper. The ratio of air flow injected in the pyrolyzer and air flow injected in the oxidation zone is called the air ratio (AR). The AR of 0.35, 0.43, and 0.49 were used for test runs. Mass and energy balances were established. The study showed the feasibility of co‐gasification of wood mixed with 20% of PE in the two‐stage gasifier. However, considerable quantity of residues rich in fixed carbon content (17% of the fuel mass and 69% of fixed carbon content) was produced due to a low reactivity of the charcoal obtained after the pyrolysis. AR increasing reduces the gas CO content due to overconsumption of char at the pyrolysis stage. H₂ and CH₄ highest values are obtained for the intermediate AR = 0.43 which maximized the LHV, energy efficiency, and carbon conversion with respectively 4674 kJ/Nm³, 64.35%, and 74.52%. Low reactivity and carbon content of the pyrolysis char likely lead to lower performance of co‐gasification of PE mixed with wood compared to wood gasification.

中文翻译：

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两级气化炉中木材和聚乙烯共气化的实验研究

在两阶段NOTAR木材用聚乙烯（PE）的20％（质量分数）混合的共气化^®固定床气化器在本文件进行了研究。注入到热解器中的空气流量与注入到氧化区中的空气流量之比称为空气比（AR）。0.35、0.43和0.49的AR用于测试运行。建立了质量和能量平衡。研究表明，在两级气化炉中，将木材与20％的PE混合共气化的可行性。然而，由于热解后得到的木炭的低反应性，产生了大量的固定碳含量丰富的残渣（燃料质量的17％和固定碳含量的69％）。由于在热解阶段焦炭的过度消耗，AR的增加降低了气体CO含量。H ₂和CH_4级用于中间AR = 0.43最大化LHV，能源效率，并分别与4674千焦耳/ Nm的碳转化，获得最高的值³，64.35％，74.52和％。与木材气化相比，热解炭的低反应性和碳含量可能导致PE与木材混合共气化的性能降低。