Two-Stage Hydrothermal Liquefaction of Sweet Sorghum Biomass—Part 1: Production of Sugar Mixtures,Energy & Fuels

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Two-Stage Hydrothermal Liquefaction of Sweet Sorghum Biomass—Part 1: Production of Sugar Mixtures
Energy & Fuels ( IF 5.2 ) Pub Date : 2018-05-30 00:00:00 , DOI: 10.1021/acs.energyfuels.8b00668
Yang Yue ₁ , James R. Kastner ₁ , Sudhagar Mani ₁

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A two-stage hydrothermal liquefaction (HTL) process was developed for sweet sorghum biomass to improve carbon conversion, to avoid repolymerization reactions between hemicellulose and lignin derivatives that impair the yield of HTL biocrude oil, and to improve the quality of upgraded biocrude oil while producing sugar mixtures as coproducts. In this paper, the first-stage HTL experiment was carried out using sweet sorghum bagasse at various temperature and time conditions to produce sugar mixtures. Under the optimum conditions of 170 °C and 60 min, 94.1% of hemicellulose and 49.2% cellulose, respectively, were hydrolyzed into C5 and C6 sugars with the maximum sugar yield of 28.14% at the concentration of 28.52 g/L. The sugar stream can be used as a stand-alone or blended with sorghum juices to produce either biofuels or value-added chemicals and products. The remaining solids fraction mainly consisted of lignin, cellulose, and a trace amount of hemicellulose that can be further converted for use as a high-quality biocrude oil.

中文翻译：

甜高粱生物质的两阶段水热液化—第1部分：糖混合物的生产

针对甜高粱生物质开发了两阶段水热液化（HTL）工艺，以提高碳转化率，避免半纤维素与木质素衍生物之间发生再聚合反应，从而损害HTL生物原油的产量，并提高生产过程中提质生物原油的质量。糖混合物作为副产品。在本文中，使用甜高粱甘蔗渣在不同温度和时间条件下进行了第一阶段的HTL实验，以生产糖混合物。在170°C和60分钟的最佳条件下，分别将94.1％的半纤维素和49.2％的纤维素水解为C5和C6糖，在28.52 g / L的浓度下最大糖产率为28.14％。糖料流可以单独使用，也可以与高粱汁混合使用，以生产生物燃料或增值化学品和产品。剩余的固体部分主要由木质素，纤维素和痕量的半纤维素组成，可以进一步转化以用作高质量的生物原油。

更新日期：2018-05-30

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