کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6690587 | 501901 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pretreatment of sugarcane bagasse with microwaves irradiation and its effects on the structure and on enzymatic hydrolysis
ترجمه فارسی عنوان
پیشگیری از باگاس نیشکر با اشعه مایکروویو و اثرات آن بر ساختار و هیدرولیز آنزیمی
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کلمات کلیدی
بیو انرژی، اتانول سلولز هیدرولیز آنزیمی، قارچ قارچ
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
This paper refers to the new proposal of pre-treatment of sugarcane bagasse with microwave associated to glycerol, seeking greater release of fermentable sugars during enzymatic hydrolysis. The residue was subjected to microwave irradiation for 5Â min with distilled water, phosphoric acid (pH 3.0) and glycerol (100%) before being enzymatically hydrolyzed using cellulase enzyme extract Myceliophthora thermophila M.7.7. and the commercial enzyme cocktail Celluclast 1.5Â L. A variety of analyses including measurement of BET surface analysis, MET, TGA, DTG, DSC, ATR-FTIR and PAD-HPLC were used to facilitate the understanding of the physical and chemical characteristics of the solid fraction resulting from pre-treatment. Infrared spectra of untreated and treated bagasse in microwave irradiation and glycerol showed significant differences in the regions 1635, 1600 and 1510 related vibration of the aromatic ring, and the band at 1100Â cmâ1 is attributed to an overlap of C-O-H elongation of primary and secondary alcohols and at 980Â cmâ1 to stretching of glycosidic linkages C-O-C. The thermal analysis showed that the bagasse treated in a microwave irradiation and glycerol has higher thermal stability compared to the untreated bagasse. The experimental results indicated that 5.4 and 11.3% w/w of lignin and xylan fractions, respectively, are degraded after pretreatment of bagasse in microwave heating with glycerol. The highest yields of hydrolysis of hemicellulose (22.4%) and cellulose (40.2%) w/w were obtained in the reaction mixture containing the enzyme and Celluclast commercial cane bagasse treated in a microwave irradiation and glycerol after 24Â h of incubation. The association of microwave and glycerol is a new alternative to deconstruction of lignocellulose structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 122, 1 June 2014, Pages 189-195
Journal: Applied Energy - Volume 122, 1 June 2014, Pages 189-195
نویسندگان
Marcia Maria de Souza Moretti, Daniela Alonso Bocchini-Martins, Christiane da Costa Carreira Nunes, Maria Arévalo Villena, Olavo Micali Perrone, Roberto da Silva, MaurÃcio Boscolo, Eleni Gomes,