TY - JOUR
T1 - In-situ upgrading of bio-tar over Mg-Ni-Mo catalyst supported by KOH treated activated charcoal in supercritical ethanol
AU - Lee, Jin Hyuk
AU - Lee, In Gu
AU - Park, Ji Yeon
AU - Lee, Kwan Young
N1 - Funding Information:
This work was supported by a National Research Council of Science & Technology (NST) grant from the Korean government (MSIP) (No. CAP-16-05-KIMM) and by the Waste-to-Energy Technology Development Program of Korea Environmental Industry & Technology Institute, granted financial resource from the Ministry of Environment, Republic of Korea (No. RE201807014).
Funding Information:
This work was supported by a National Research Council of Science & Technology ( NST ) grant from the Korean government ( MSIP ) (No. CAP-16-05-KIMM) and by the Waste-to-Energy Technology Development Program of Korea Environmental Industry & Technology Institute, granted financial resource from the Ministry of Environment, Republic of Korea (No. RE201807014).
PY - 2019/7/1
Y1 - 2019/7/1
N2 - In-situ catalytic hydrodeoxygenation (HDO) of bio-tar in supercritical ethanol for upgraded biofuel was investigated. Highly mesoporous KOH-treated AC (KOH-AC) was synthesized by chemical activation and used as the support for Ni-based catalysts. Among the tested catalysts (AC, KOH-AC, Mg-Ni-Mo/AC, and Mg-Ni-Mo/KOH-AC), Mg-Ni-Mo/KOH-AC with a high surface area of 1310.1 m2/g and a well-developed mesoporous structure exhibited much higher catalytic performance for the HDO of bio-tar. The effects of different reaction temperatures (300–400 °C) and residence time (0–120 min) on the HDO of bio-tar over Mg-Ni-Mo/KOH-AC were also examined. Enhanced properties of liquid fuel with a higher heating value (HHV) of 36.2 MJkg−1, an oxygen content of 11.7 wt%, and a total acid number (TAN) value of 8.6 mgKOHg−1 were obtained from bio-tar over a Mg-Ni-Mo/KOH-AC at 400 °C for 120 min. In these conditions, acids, aldehydes, and oxygenated phenols present in bio-tar (>67 area%) were effectively converted to high value-added species including aromatics, hydrocarbons, and alkyl phenols in upgraded bio-tar (>77 area%) via esterification, hydrogenation, deoxygenation, and ring-alkylation reactions. A series of Mg-Ni-Mo/KOH-AC catalyst recycle test showed the deposition of coke on the catalyst, which became a major reason for the catalyst deactivation.
AB - In-situ catalytic hydrodeoxygenation (HDO) of bio-tar in supercritical ethanol for upgraded biofuel was investigated. Highly mesoporous KOH-treated AC (KOH-AC) was synthesized by chemical activation and used as the support for Ni-based catalysts. Among the tested catalysts (AC, KOH-AC, Mg-Ni-Mo/AC, and Mg-Ni-Mo/KOH-AC), Mg-Ni-Mo/KOH-AC with a high surface area of 1310.1 m2/g and a well-developed mesoporous structure exhibited much higher catalytic performance for the HDO of bio-tar. The effects of different reaction temperatures (300–400 °C) and residence time (0–120 min) on the HDO of bio-tar over Mg-Ni-Mo/KOH-AC were also examined. Enhanced properties of liquid fuel with a higher heating value (HHV) of 36.2 MJkg−1, an oxygen content of 11.7 wt%, and a total acid number (TAN) value of 8.6 mgKOHg−1 were obtained from bio-tar over a Mg-Ni-Mo/KOH-AC at 400 °C for 120 min. In these conditions, acids, aldehydes, and oxygenated phenols present in bio-tar (>67 area%) were effectively converted to high value-added species including aromatics, hydrocarbons, and alkyl phenols in upgraded bio-tar (>77 area%) via esterification, hydrogenation, deoxygenation, and ring-alkylation reactions. A series of Mg-Ni-Mo/KOH-AC catalyst recycle test showed the deposition of coke on the catalyst, which became a major reason for the catalyst deactivation.
KW - Bio-tar
KW - High value-added chemicals
KW - KOH-treated activated charcoal
KW - Mg-Ni-Mo catalyst
KW - Supercritical ethanol
KW - Upgrading
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U2 - 10.1016/j.fuel.2019.03.035
DO - 10.1016/j.fuel.2019.03.035
M3 - Article
AN - SCOPUS:85062868675
VL - 247
SP - 334
EP - 343
JO - Fuel
JF - Fuel
SN - 0016-2361
ER -