کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7786357 1500622 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of structural characteristics of corncob hemicelluloses fractionated by graded ethanol precipitation on furfural production
ترجمه فارسی عنوان
تاثیر ویژگی های ساختاری همی سلولزهای قرنسبتی که از طریق بارگذاری اتانول درجه بندی شده بر تولید فورفورال
کلمات کلیدی
کورنوس، پلی ساکارید محلول در آب، همی سلولز محلول قلیایی، بارش اتانول درجه بندی شده فورفورال،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
In the present study, a graded ethanol precipitation technique was employed to obtain hemicelluloses from the alkali-extracted corncob liquid. The relationship between the structural characteristics of alkali-soluble corncob hemicelluloses and the production of furfural was investigated by a heterogeneous process in a biphasic system. Results showed that alkali-soluble corncob hemicelluloses mainly consisted of glucuronoarabinoxylans and l-arabino-(4-O-methylglucurono)-d-xylans, and the drying way had less influence on the sugar composition, molecular weights and the functional groups of hemicelluloses obtained by the different ethanol concentration precipitation except for the thermal property, the amorphous structure and the ability for the furfural production. Furthermore, alkali-soluble corncob hemicelluloses with higher xylose content, lower branch degree, higher polydispersity and crystallinity contributed to the furfural production. A highest furfural yield of 45.41% with the xylose conversion efficiency of 99.06% and the furfural selectivity of 45.84% was obtained from the oven-dried hemicelluloses precipitated at the 30% (v/v) ethanol concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 136, 20 January 2016, Pages 203-209
نویسندگان
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