State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA.
Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA.
Bioresour Technol. 2019 Oct;289:121589. doi: 10.1016/j.biortech.2019.121589. Epub 2019 Jun 1.
Pyrolysis of five poplar samples with differing degrees of recalcitrance was performed; the correlations between the poplar enzymatic hydrolysis glucose yields and the physicochemical properties of pyrolysis product were investigated in this study. Sugar release of five poplar samples varied from 48.1 to 112.3 mg/g for glucose, and 12.0 to 32.4 mg/g for xylose. The yield of pyrolysis products was calculated and the molecular weight distribution of pyrolysis oils was measured by GPC, ranging from 268 to 289 g/mol for its weight-average molecular weight. GC-MS analysis of the bio-oil exhibited a strong correlation between biomass recalcitrance and guaiacyl-type structures in bio-oils. The correlation between biomass recalcitrance and the ratio of syringyl-to-guaiacyl-type-related structures was also assessed. The results from quantitative P NMR indicated some correlation between biomass recalcitrance and the guaiacyl hydroxyl groups in bio-oils. These results illustrate correlations and differences between converting biomass to biofuels via the biological and thermal platform.
本研究对五个木质素含量不同的杨树样本进行了热解实验，考察了杨树酶解葡萄糖产率与热解产物理化性质之间的相关性。五个杨树样本的糖释放量为葡萄糖 48.1-112.3mg/g，木糖 12.0-32.4mg/g。通过 GPC 计算了热解产物的产率，并测量了热解油的分子量分布，其重均分子量为 268-289g/mol。GC-MS 分析表明，生物油中的生物质抗降解性与生物油中的愈创木基型结构之间存在很强的相关性。还评估了生物质抗降解性与联苯型结构与愈创木基型结构之比之间的相关性。定量 P NMR 的结果表明，生物质抗降解性与生物油中的愈创木基型羟基之间存在一定的相关性。这些结果说明了通过生物和热平台将生物质转化为生物燃料的相关性和差异性。
