The primary challenge producing synthesis gas through gasification is the presence of contaminants, particularly tar, which causes significant issues in downstream applications. Removing tar during the biomass gasification process results in a higher-quality product and makes gasification a promising method for converting biomass into renewable energy for use in downstream processes such as internal combustion engines, gas turbines, fuel cells, and liquid hydrocarbon production. Therefore, it is essential to include a crucial step for absorbing syngas impurities at relatively lower temperature to incorporate lighter tar compounds into the final product. This study conducted a comparative evaluation including tar removal efficiency analysis and statistical investigation of tar reduction using absorbent fluids (water, castor oil, and waste cooking oil) under various operational conditions: mixing speed (0, 300 and 750 rpm) and fluid temperature (40, 50 and 60 ℃) in a walnut shell fixed bed gasifier reactor. The statistical analysis showed that all three parameters significantly affected tar decomposition during biomass gasification at a 1 % significant level. The results also indicated that the highest tar removal was achieved using a castor oil scrubber (27.15 mg ⁄ Nm3) with an 88.62 % removal efficiency. Given the significant impact of castor oil scrubber on reducing tar production, it is anticipated that the findings of this research will promote the industrial use of gasification.

中文翻译：

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核桃壳下吸式固定床气化炉去除合成气焦油


通过气化生产合成气的主要挑战是污染物的存在，特别是焦油，这会在下游应用中造成严重问题。在生物质气化过程中去除焦油可以产生更高质量的产品，并使气化成为将生物质转化为可再生能源以用于内燃机、燃气轮机、燃料电池和液态烃生产等下游过程的有前途的方法。因此，有必要包括在相对较低的温度下吸收合成气杂质的关键步骤，以将较轻的焦油化合物掺入最终产品中。本研究进行了比较评估，包括焦油去除效率分析和在各种操作条件下使用吸收剂液体（水、蓖麻油和废弃食用油）减少焦油的统计调查：混合速度（0、300和750rpm）和液体温度（ 40、50和60℃）在核桃壳固定床气化反应器中。统计分析表明，所有三个参数均以 1% 的显着水平显着影响生物质气化过程中的焦油分解。结果还表明，使用蓖麻油洗涤器 (27.15 mg ⁄ Nm3) 实现了最高的焦油去除率，去除效率为 88.62%。鉴于蓖麻油洗涤器对减少焦油产量的显着影响，预计这项研究的结果将促进气化的工业应用。