کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5201273 | 1502887 | 2016 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrothermal degradation of hemicelluloses from triploid poplar in hot compressed water at 180-340 °C
ترجمه فارسی عنوان
تخریب هیدروترمال همی سلولز از صنوبر تریپلوئید در آب گرم با دمای 180-340 درجه سانتی گراد
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کلمات کلیدی
همی سلولز، هیدروترمال تنزل، تعیین مشخصات، مکانیسم،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Hemicelluloses isolated from triploid poplar were subjected to hydrothermal degradation at 180-340 °C. The detailed physicochemical characteristics of hydrothermal degradation products including monosaccharide and XOS, molecular weight, inhibitory and organic compounds were detected by HPAEC, GPC, HPLC, and GC-MS, respectively. An increase in temperature led to a significant decrease in molecular weight and an increase in C2-C5 organic alcohols and acids. More importantly, besides two well-known routes that hemicelluloses are hydrolyzed to monosaccharide, followed by further degraded to furfural, a series of reaction routes was proposed to clarify and explain the mechanisms of the hydrothermal degradation of hemicelluloses from triploid poplar, which involved: (i) a predominant route of fragmentation; (ii) side reactions such as oxidation, dehydration, isomerization/rearrangement, and self-lactonization; (iii) larger molecular fragments from sugars by deoxydation or/and oxidation, followed by self-lactonization; and (iv) very few extensive re-polymerization including esterification and condensation among hemicelluloses and lignin fragments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 126, April 2016, Pages 179-187
Journal: Polymer Degradation and Stability - Volume 126, April 2016, Pages 179-187
نویسندگان
Yuefang Gao, Haitao Wang, Junhong Guo, Pai Peng, Meizhi Zhai, Diao She,