کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7063021 | 1459784 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical and structural factors influencing enzymatic saccharification of wood from aspen, birch and spruce
ترجمه فارسی عنوان
عوامل شیمیایی و سازه ای که تحت تأثیر واکنش زنجیره ای آنزیمی از آسپن، توس و صنوبر قرار می گیرند
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کلمات کلیدی
چوب سخت چوب نرم ترکیب شیمیایی، قبل از درمان اسید سولفوریک، واکنش زنجیره ای آنزیمی، ساختار فیزیکی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The susceptibility of untreated and sulfuric-acid-pretreated aspen, birch, and spruce to analytical enzymatic saccharification was studied in relation to their chemical composition and physical-structural features. The analytical data collected covered the mass fractions of lignin, carbohydrates, and extractives, the release of acetic acid, formic acid, and uronic acids by acid and alkaline hydrolysis, crystallinity and crystallite size, syringyl: guaiacyl (S:G) ratio of lignin, cellulose accessibility, FTIR spectra, images from SEM and fluorescence microscopy, and susceptibility to enzymatic saccharification using enzyme mixtures with and without supplementary xylanase.In the absence of pretreatment the mass fraction yield of Glc on the original dry wood in the analytical enzymatic saccharification increased in the order birch (16 g kgâ1) < spruce (35 g kgâ1) < aspen (150 g kgâ1). After acid pretreatment, the order changed to spruce (170 g kgâ1)â¯<â¯aspen (290 g kgâ1), birch (290 g kgâ1). The relatively high recalcitrance of untreated birch was not possible to relate to mass fraction of lignin, S:G ratio, cellulose crystallinity, or mass fraction of acetyl, but rather to structural features, such as a more compact surface structure with high density and low cellulose accessibility. The relatively high sugar yields from both untreated and pretreated aspen suggest that aspen wood is well suited as feedstock for production of liquid biofuels and green chemicals in forest-based biorefineries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 109, February 2018, Pages 125-134
Journal: Biomass and Bioenergy - Volume 109, February 2018, Pages 125-134
نویسندگان
Zhao Wang, Sandra Winestrand, Thomas Gillgren, Leif J. Jönsson,