کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7081743 1460000 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Intensification of hemicellulose hot-water extraction from spruce wood in a batch extractor - Effects of wood particle size
ترجمه فارسی عنوان
استحکام استخراج هیدروکسید کلسیم از چوب صنوبر در یک اکسترودر - اثر اندازه ذرات چوب
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The effect of five different wood particle size fractions between 0.5 and 12.5 mm on hot-water extraction of acetylated water-soluble hemicelluloses from spruce wood with a batch extraction setup at 170 °C was investigated. Extraction kinetics, with regard to particle size, was also studied. The purpose was to intensify the hemicellulose extraction for high molar mass hemicelluloses at high yield and purity. About 30% of the wood was dissolved and basically all the hemicelluloses could be extracted. The average molar masses of the extracted hemicelluloses decreased rapidly during the first 10 min of the extraction, but were not much affected by the difference in wood particle sizes. Smaller particles resulted in higher extraction rates. The reaction order was established to be of pseudo-first order for particles above 2 mm and 1.5st order for particles smaller than 2 mm. The effective diffusion coefficient was determined to be 9.11 × 10−10 m2/s.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 143, September 2013, Pages 212-220
نویسندگان
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