کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6630607 | 1424934 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Polymerization of glucose during acid-catalyzed pyrolysis at low temperatures
ترجمه فارسی عنوان
پلیمریزاسیون گلوکز در طویل شدن اسید کاتالیز شده در دماهای پایین
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کلمات کلیدی
زیست توده، گلوکز، پیرولیز، کاتالیز اسید، بسپارش،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
This study reports the importance of polymerization reactions during the pyrolysis of acid-impregnated glucose at 60-150â¯Â°C. The experimental results demonstrate that polymerization reactions are the dominant reactions to produce oligosaccharides of various linkages and degrees of polymerization (DP) during acid-catalyzed glucose pyrolysis at low temperatures. The maximal DP of the oligosaccharide products depends on pyrolysis temperature, i.e., from â¼4 at 60â¯Â°C to â¼18 at 120â¯Â°C. As the major primary products, the disaccharides of various α and β linkages (including 1,6-, 1,4-, 1,3-, 1,2- and 1,1-glycosidic bond) have been successfully identified, indicating that mutarotation reactions also play important roles in acid-catalyzed glucose pyrolysis. Due to the high reactivity of the hydroxyl group on C6, disaccharides with 1,6-glycosidic bond (i.e., gentiobiose and isomaltose) are more favorably formed with high initial selectivities, i.e., â¼27 and â¼20% for gentiobiose and isomaltose at an acid loading of 0.5â¯mmol/g, respectively. The formation of α-linkage disaccharides follows an order of 1,6-glycosidic bondâ¯>â¯1,4-glycosidic bondâ¯>â¯1,3-glycosidic bondâ¯>â¯1,2-glycosidic bondâ¯>â¯1,1-glycosidic bond. An increase in acid loading enhances the formation of disaccharides, especially those with 1,6-glycosidic bond. The experimental results reported in the study provide new insights into acid-catalyzed glucose pyrolysis mechanism for the development of advanced pyrolysis technologies to produce biofuels and biochemicals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 230, 15 October 2018, Pages 83-88
Journal: Fuel - Volume 230, 15 October 2018, Pages 83-88
نویسندگان
Yu Long, Yun Yu, Bing Song, Hongwei Wu,