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Hydrodeoxygenation of lignin Optimizing phenolic content for adhesive production

Huisman, B. (2010) Hydrodeoxygenation of lignin Optimizing phenolic content for adhesive production. Master's Thesis / Essay, Chemistry.

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Environmental concerns and future shortage have increased the research on alternatives for fossil derived products. Lignocellulosic biomass is the world’s most abundant renewable material and is considered as a promising alternative for the renewable production of fuels, chemicals, and energy. The lignin fraction in lignocellulosic biomass is often considered as waste. However, lignin is rich in phenolic fragments and these could serve as valuable precursors for a range of bulk chemicals. Phenol for example, is widely used in commercial applications, such as: wood adhesives and synthetic plastics. Catalytic hydrodeoxygenation (HDO) is used in this research as a technique to obtain phenolics from lignin. This thesis focuses on the catalytic HDO in a semicontinuous reactor setup. The objective was to develop and construct a semi continuous reactor setup for the optimization of low molecular weight phenolicyields from lignin. Experiments were conducted with ALCELL® Lignin and a Ruthenium on carbon (Ru/C) catalyst at a temperature of 400oC, hydrogen pressure in the range of 80- 160 bars, and hydrogen flow in the range of 0-200 ml. min-1. Highest light oil production was obtained with a hydrogen pressure of 130 bars and a hydrogen flow of 200 ml. min-1. The light oil yield was 25 %-wt. However, the used catalyst, Ru/C, was too active at the proposed reaction condition. The chemical composition of the light oil consisted mainly of linear alkanes and aromatics. The second objective of this thesis was to explore the possible use of HDO lignin oil as phenol replacement in phenol formaldehyde (PF) resins. Based on the composition of the HDO lignin oil, several model components were selected for the formulation of a PF resin. Those PF resins were tested according to the EN- 314 standard. The results indicate that all prepared resins pass the standard test value. However, increasing the amount of phenol replacement with model compounds resulted in decreased tensile properties.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Chemistry
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:45
Last Modified: 15 Feb 2018 07:45

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