Abstract The aim of this paper is to improve the conversion of sugarcane bagasse to pyrolytic sugar levoglucosan through its pretreatment with acetic acid (10 wt.%) at 90 °C for 10 min under 200 rpm. Then, acid treated biomass was rinsed with deionized water to a neutral pH and dried in a vacuum oven at 70 °C up to constant weight. After acid treatment, the samples were subjected to fast pyrolysis in a Py-GC/MS. Thus, the impact of the acetic acid on the levoglucosan yield as well as other pyrolytic compounds released during pyrolysis process at different temperatures (from 350 to 600 °C) is reported. The best results respect to levoglucosan yield were attained when pyrolysis was performed at 400 °C resulting in around nine folds levoglucosan production from sugarcane bagasse after biomass treatment with acid compared to the control (untreated biomass samples) while the yield of some undesirable lignin derived compounds decreases in acid washed samples. The effect observed is due to the removal of the catalytic activity of alkali and alkaline earth metals. The attained results are very attractive because this pyrolytic sugar exhibits great potential as renewable feedstock for biofuels production and other bioproducts.

中文翻译：

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甘蔗渣快速热解热化学转化：左旋葡聚糖产量高

摘要 本文的目的是通过用乙酸（10 wt.%）在 90 °C 和 200 rpm 下预处理 10 分钟来提高甘蔗渣向热解糖左旋葡聚糖的转化率。然后，酸处理的生物质用去离子水冲洗至中性 pH 值，并在 70°C 的真空烘箱中干燥至恒重。酸处理后，样品在 Py-GC/MS 中进行快速热解。因此，报告了乙酸对左旋葡聚糖产率以及在不同温度（350 至 600 °C）下热解过程中释放的其他热解化合物的影响。当在 400 °C 下进行热解时，获得了关于左旋葡聚糖产率的最佳结果，与对照（未处理的生物质样品）相比，酸处理后甘蔗渣的左旋葡聚糖产量是对照（未处理的生物质样品）的 9 倍，而一些不需要的木质素衍生化合物的产率酸洗样品减少。观察到的效果是由于去除了碱金属和碱土金属的催化活性。所获得的结果非常有吸引力，因为这种热解糖具有作为生物燃料生产和其他生物产品的可再生原料的巨大潜力。