While torrefaction improves the fuel properties of biomass pellets, the chemical components of secondary products in liquid form are highly valuable in the industrial field. In addition, the components of the liquid have the potential to be used as biopesticides. In this study, corn stalk pellets were torrefied at 320 °C and torliquid was obtained as a secondary product from condensable gases during the process. Calorific value of the corn stalk pellets increased from 19.10 MJ kg−1 to 22.58 MJ kg−1 during torrefaction process. According to the Gas Chromatography-Mass Spectrometry findings, the torliquid contained mostly acidic components (52.20 %) due to the nearly complete degradation of hemicellulose. Potential bioactivity of the torliquid on the two-spotted spider mite Tetranychus urticae Koch, 1836 (Acari: Tetranychidae), worldwide major phytophagous pest, was investigated. Dipping method and half-treated leaf disc assay were used to determine lethal and repellent effects, respectively.

中文翻译：

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玉米秸秆颗粒烘焙液对二点叶螨的潜在生物杀虫作用 Koch, 1836（螨虫：叶螨科）


虽然烘焙改善了生物质颗粒的燃料特性，但液体形式的二次产品的化学成分在工业领域具有很高的价值。此外，该液体的成分有可能用作生物农药。在这项研究中，玉米秸秆颗粒在 320 °C 下进行烘焙，在此过程中从可凝结气体中获得了作为二次产品的 Torliquid。在烘焙过程中，玉米秸秆颗粒的热值从 19.10 MJ kg−1 增加到 22.58 MJ kg−1。根据气相色谱-质谱分析结果，由于半纤维素几乎完全降解，托液中主要含有酸性成分（52.20%）。研究了 torliquid 对世界主要植食性害虫二斑叶螨 Tetranychus urticae Koch, 1836（螨虫：叶螨科）的潜在生物活性。分别采用浸渍法和半处理叶盘试验测定致死和驱避效果。