کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
229149 464861 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of by-products from organosolv pretreatments of yellow poplar wood (Liriodendron tulipifera) in the presence of acid and alkali catalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Characterization of by-products from organosolv pretreatments of yellow poplar wood (Liriodendron tulipifera) in the presence of acid and alkali catalysts
چکیده انگلیسی

Characterization of by-products generated during organosolv pretreatments of yellow poplar wood was performed in the presence of sulfuric acid and sodium hydroxide catalysts to elucidate the effects on further biological fermentation and provide the preliminary data for utilization of organosolv lignin. Monomeric sugars contents were 2.2–7.7% in organosoluble fraction with acid catalyst, while significantly lower amount of sugars (0.2–0.3%) were determined in that of with alkali catalyst. However, the concentrations of monomeric sugars were very low to ferment directly. Therefore, the oligomeric sugars in organosoluble fraction should be recovered to improve the economic feasibility of the organosolv pretreatment. Higher concentrations of inhibitory compounds such as acetic acid, 5-HMF and furfural were determined in the organosoluble fraction with acid catalyst. However, the concentrations were lower than the minimum inhibitory concentration to the microorganism for further biological process regardless of catalyst. Thus, the compounds could not inhibit the biological fermentation of organosoluble fraction. Precipitates, solid by-products, were also characterized by diverse analytical methods and the analysis results revealed that the precipitates were mostly composed of lignin polymers regardless of catalyst. However, the structures could be slightly modified during pretreatment and mixed with come carbohydrates by chemical bonds and/or physical association.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Industrial and Engineering Chemistry - Volume 17, Issue 1, 25 January 2011, Pages 18–24
نویسندگان
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