Hierarchical Porous Activated Carbon-Supported Ruthenium Catalysts for Catalytic Cleavage of Lignin Model Compounds

Xuan-Tien Pham, Vy Anh Tran, Lan-Trinh Thi Tran, Tram Ngoc P. Nguyen, Thong Hoang Le, Huy Hoang, Thi-Hiep Nguyen, Khanh B. Vu and Thanh Khoa Phung ()
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Xuan-Tien Pham: Department of Chemical Engineering, School of Chemical and Environmental Engineering, International University, Ho Chi Minh City, Vietnam
Vy Anh Tran: Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
Lan-Trinh Thi Tran: Vietnam National University, Ho Chi Minh City, Vietnam
Tram Ngoc P. Nguyen: Department of Chemical Engineering, School of Chemical and Environmental Engineering, International University, Ho Chi Minh City, Vietnam
Thong Hoang Le: Vietnam National University, Ho Chi Minh City, Vietnam
Huy Hoang: Vietnam National University, Ho Chi Minh City, Vietnam
Thi-Hiep Nguyen: Vietnam National University, Ho Chi Minh City, Vietnam
Khanh B. Vu: Department of Chemical Engineering, School of Chemical and Environmental Engineering, International University, Ho Chi Minh City, Vietnam
Thanh Khoa Phung: Department of Chemical Engineering, School of Chemical and Environmental Engineering, International University, Ho Chi Minh City, Vietnam

Energies, 2022, vol. 15, issue 22, 1-10

Abstract: The catalytic conversion of lignin model compounds was performed using Ru/C catalysts and an autoclave reactor. The Ru/C catalysts were prepared by the impregnation method using highly porous homemade activated carbon and characterized by XRD, SEM, and specific surface area. The catalytic reactions were performed in a high pressure/temperature reactor at different temperatures and with different solvents. The results showed that the novel Ru/C catalysts prepared from carbon supports activated by the KOH agent showed higher catalytic activity than the commercial catalyst. Ethanol and 2-propanol were suitable solvents for the cleavage of the β–O–4 ether bond of 2-phenoxy-1-phenyl ethanol (~65–70% conversion) over a Ru/C-KOH-2 catalyst at 220 °C in comparison to tert-butanol and 1-propanol solvents (~43–47% conversion of 2-phenoxy-1-phenyl ethanol). Also, the increase in reaction temperature from 200 °C to 240 °C enhanced the cleavage of the ether bond with an increase in phenol selectivity from 9.4% to 19.5% and improved the catalytic conversion of 2-phenoxy-1-phenyl ethanol from 46.6% to 98.5% over the Ru/C-KOH-2 catalyst and ethanol solvent. The Ru/C-KOH-2 catalyst showed outstanding conversion (98.5%) of 2-phenoxy-1-phenylethanol at 240 °C, 1 h, ethanol solvent. This novel hierarchical porous activated carbon-supported ruthenium catalyst (Ru/C-KOH-2) can be applied for the further conversion of the lignin compound.

Keywords: active carbon; biochar; Ru/C; lignin; ?-O-4 aryl ether (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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