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نویسندگان مقالات پربازدید :
فناوری منابع زیستی
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
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  • characterization of a bio-oil from pyrolysis of rice husk by detailed compositional analysis and structural investigation of lignin

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    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 816
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    • شماره تماس دبیرخانه رویداد: -
     detailed compositional analysis of a bio-oil (bo) from pyrolysis of rice husk was carried out. the bo was extracted sequentially with n-hexane, ccl4, cs2, benzene and ch2cl2. in total, 167 organic species were identified with gc/ms in the extracts and classified into alkanes, alcohols, hydroxybenzenes, alkoxybenzenes, dioxolanes, aldehydes, ketones, carboxylic acids, esters, nitrogen-containing organic compounds and other species. the benzene ring-containing species (brccs) were attributed to the degradation of lignin while most of the rests were derived from the degradation of cellulose and hemicellulose. along with guaiacyl and p-hydroxyphenyl units as the main components, a new type of linkage was suggested, i.e., car–ch2–car in 4,4′-methylenebis(2,6-dimethoxyphenol). based on the species identified, a possible macromolecular structure of the lignin and the mechanism for its pyrolysis are proposed. the bo was also extracted with petroleum ether in ca. 17.8% of the extract yield and about 82.1% of the extracted components are brccs.

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