Products Cited in Publications Worldwide Hierarchical porous activated carbon-supported ruthenium catalysts for catalytic cleavage of lignin model compounds

Hierarchical porous activated carbon-supported ruthenium catalysts for catalytic cleavage of lignin model compounds

Pham, Xuan-Tien; Tran, Vy Anh; Tran, Lan-Trinh Thi; Nguyen, Tram Ngoc P; Le, Thong Hoang; Hoang, Huy; Nguyen, Thi-Hiep; Vu, Khanh B; Phung, Thanh Khoa

DOI:

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-phenoxy1-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 ; β-O-4 aryl ether

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A2404054249-72-397%

2-Phenoxy-1-phenylethanol

10.0/250mg

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A35545340515-89-797%

Phenethoxybenzene

115.0/25g

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