کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7063101 1459786 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In-situ steam reforming of biomass tar over sawdust biochar in mild catalytic temperature
ترجمه فارسی عنوان
اصلاح پارامتر بخار زیست توده در خاک زغال چوب خاک اره در دمای کم کاتالیزوری
کلمات کلیدی
در موقعیت، درجه حرارت خفیف، اصلاح تار، بخار، زعفران، زیتون خاک اره،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
In order to fully understand the catalytic activities of sawdust biochar on in-situ tar steam reforming in mild catalysis temperatures (650-800 °C), the experiment was carried out in a two-stage fluidized bed/fixed bed reactor. The structural characteristics of biochar were analyzed by the Raman and XPS spectroscopies. The results of in-situ tar steam reforming over biochar were performed by gas chromatograph/mass spectrometer (GC/MS). Kinetic aspects of tar steam reforming in mild temperatures were calculated to evaluate the catalytic effect of sawdust biochar on in-situ tar reforming. The results indicate that sawdust biochar has a positive effect on in-situ tar steam reforming, while the effect is not proportional to biochar amount. During the in-situ tar steam reforming over biochar, the changes of oxygen-containing functional groups on biochar surface are mainly caused by the C-O bonds. The first order kinetic rate constant of sawdust biochar for the heterogeneous reforming of biomass tar at 650-800 °C is found to have an apparent activation energy (Eapp) of 35.03 kJ/mol with the apparent pre-exponential factor (kapp) of 1.8 × 104 m3 kg−1h−1. The biochar structures were considerably transformed during the tar steam reforming. According to GC/MS analysis of biomass tar, the biochar seems to promote the cracking of large ring polyaromatic tar compounds to form 1-ring aromatic ones.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 107, December 2017, Pages 261-270
نویسندگان
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