Journal
BIORESOURCE TECHNOLOGY
Volume 226, Issue -, Pages 125-131Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.12.030
Keywords
Hydrolyzed lignin; Ni/Al-SBA-15; Pore size; Char; Phenolic monomer
Funding
- Natural Science Foundation of China [51476178, 51676191]
- Youth Science and technology innovation talents plan of Guangdong Province [2015TQ01N652]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
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In this work, the mesoporous SBA-15 and a series of modified catalysts based on it, such as Al-SBA-15 and Ni/Al-SBA-15, were synthesized and used for eliminating the char formation during the depolymerization of hydrolyzed lignin. The temperature, time and solvent effects on the lignin depolymerization were also investigated. Results showed that the repolymerization was effectively suppressed over SBA-15 due to its well-ordered pore structure and large pore size. The addition of Al and Ni elements in SBA-15 could improve the lignin depolymerization performance and saturate the instable intermediates. Ethanol was found to be more effective in suppressing repolymerization than other solvents. 81.4% liquefaction degree and 21.90 wt% monomer yield was achieved, and no obvious char was observed after the depolymerization of hydrolyzed lignin in ethanol solvent at 300 degrees C for 4 h over Ni/Al-SBA-15(20) catalyst. (C) 2016 Elsevier Ltd. All rights reserved.
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