کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1386204 982481 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of enzymatic saccharification of cellulose by cellulose dissolution pretreatments
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Enhancement of enzymatic saccharification of cellulose by cellulose dissolution pretreatments
چکیده انگلیسی

Attempts were made to enhance cellulose saccharification by cellulase using cellulose dissolution as a pretreatment step. Four cellulose dissolution agents, NaOH/Urea solution, N-methylmorpholine-N-oxide (NMMO), ionic liquid (1-butyl-3-methylimidazolium chloride; [BMIM]Cl) and 85% phosphoric acid were employed to dissolve cotton cellulose. In comparison with conventional cellulose pretreatment processes, the dissolution pretreatments were operated under a milder condition with temperature <130 °C and ambient pressure. The dissolved cellulose was easily regenerated in water. The regenerated celluloses exhibited a significant improvement (about 2.7- to 4.6-fold enhancement) on saccharification rate during 1st h reaction. After 72 h, the saccharification yield ranged from 87% to 96% for the regenerated celluloses while only around 23% could be achieved for the untreated cellulose. Even with high crystallinity, cellulose regenerated from phosphoric acid dissolution achieved the highest saccharification rates and yield probably due to its highest specific surface area and lowest degree of polymerization (DP).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 77, Issue 1, 22 May 2009, Pages 41–46
نویسندگان
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