کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6638722 461164 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrothermal liquefaction of barks into bio-crude - Effects of species and ash content/composition
ترجمه فارسی عنوان
مایع سازی هیدروترمال بارک ها به زیست خام - اثر گونه ها و محتوای خاکستر / ترکیب خاک
کلمات کلیدی
پارس سگ، تبدیل به مایع، بیو خام، خاکستر، کاتالیزوری،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Liquefaction of barks of white pine, white spruce and white birch was performed in ethanol-water (50:50, v/v) co-solvents under the initial N2 pressure of 2.0 MPa at 300 °C for 15 min. It was found that the liquefaction efficiency, in terms of bark conversion and bio-crude yield, varied significantly with bark species and ash content/composition. As far as the bark conversion was concerned, the order follows: white spruce bark (92%) > white birch bark (89%) > white pine bark (68%), which is also in good agreement with the ash content of the barks: white spruce bark (3.07%) > white birch bark (2.68%) > white pine bark (1.07%). Bio-crude yield reduced in the following order: white birch bark (67%) > white spruce bark (58%) ≫ white pine bark (36%). Effects of ash content on bark liquefaction were investigated by comparing the liquefaction efficiencies between crude bark and de-ashed bark. Deashing pre-treatment of barks in 0.5 M nitric acid efficiently decreased ash content in barks of white pine, white spruce and white birch form 1.07%, 3.07%, 2.68% to 0.67%, 0.33% and 0.32%, respectively. The de-ashing of bark decreased both bark conversion rate and bio-crude yield for all barks, suggesting that the ash of the bark play catalytic roles in the bark liquefaction, which was confirmed by the addition of K2CO3 and Ca(OH)2 into de-ashed barks. The bark-derived bio-crude oils are aromatic/phenolic in nature with HHVs of 25-39 MJ/kg. The obtained bio-crude oils also have relatively lower molecular weights (Mn = 320-600 g/mol, Mw = 800-1700 g/mol, PDI = 2.2-2.9), which makes the bio-crude oils promising in the applications for either bio-fuel or as a phenol substitute in bio-phenolic resins.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 116, 15 January 2014, Pages 214-220
نویسندگان
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