A review on high catalytic efficiency of solid acid catalysts for lignin valorization.

Authors :: Guan W
Tsang CW
Lin CSK
Len C
Hu H
Liang C
Source :: Bioresource technology [Bioresour Technol] 2020 Feb; Vol. 298, pp. 122432. Date of Electronic Publication: 2019 Nov 14.
Publication Year :: 2020
Abstract: It is imminent to develop renewable resources to replace fossil-derived energies as fossil resources are on the brink of exhaustion. Lignin is one of the major components of lignocellulosic biomass, which is a natural amorphous three-dimensional polymer with abundant C-O bonds and aromatic structure. Hence, valorization of lignin into high value-added liquid fuels and chemicals is regarded as a promising strategy to mitigate fossil resource shortages. Solid acid catalysts are extensively studied due to environmentally friendly in terms of the ease of separation, recovery and reduced amount of wastes. Hence, this review focuses on summarizing the recent progress of catalytic valorization of lignin over different kinds of solid acid catalysts including zeolites, heteropolyacids, metal oxides, amorphous SiO <subscript>2</subscript> -Al <subscript>2</subscript> O <subscript>3</subscript> , metal phosphates, and Lewis acid. Based on reviewing of current progress of lignin conversion, the challenges and future prospects are emphasized.<br /> (Copyright © 2019 Elsevier Ltd. All rights reserved.)

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