Bio-oil hydrodeoxygenation over acid activated-zeolite with different Si/Al ratio
نویسندگان
چکیده
Bio-oil includes significant levels of oxygenate molecules, which might induce component instability and reduce its physicochemical qualities. To counteract this, the must undergo a hydrodeoxygenation (HDO) reaction. Due to presence acidic active sites, zeolites have been shown high hydrogenation deoxygenation capabilities. However, natural zeolite has large number impurities low acidity density. Consequently, before being employed as an HDO catalyst, pretreatments such preparation activation are required. In this study, catalyst used was whose level varied depending on Si/Al ratio after dealumination with 3, 5, 7 M hydrochloric acid, proceeded by calcination nitrogen gas flow (designated Z3, Z5, Z7, respectively). The results showed that generally caused changes in physical characteristics components. Z5 best catalytic performance process bio-oil. higher heating value (HHV) bio-oil increased from 12 18 MJ/kg, viscosity doubled, degree 77%, water content reduced dramatically about one-third raw Moreover, control compounds, carboxylic acids, decreased slightly, but amount phenol twice
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ژورنال
عنوان ژورنال: Biofuel research journal
سال: 2022
ISSN: ['2292-8782']
DOI: https://doi.org/10.18331/brj2022.9.2.4