Dissertation
DESIGN AND EVALUATE DEEP EUTECTIC SOLVENTS LIGNIN EXTRACTION FOR ADVANCED MATERIAL APPLICATIONS
Doctor of Philosophy (PhD), Washington State University
01/2020
Handle:
https://hdl.handle.net/2376/116897
Abstract
Biomass utilization for renewable fuels has been recognized as a critical component for sustainable energy and the solution for climate change. However, unlike petroleum, lignocellulosic biomass is a highly heterogeneous substrate contains high oxygen contents and strong recalcitrance that hurdle the commercialization of biorefinery. Lignin represents the largest renewable aromatics on territorial earth. It offers an enormous potential for sustainable production of fuels, chemicals and materials. There is a reinvigorated interest in the last decade or so toward lignin valorization. At the same time, more and more people become recognized that commercializing new products from lignin is perhaps one of the most challenging research endeavors in our era. It is a true scientific dilemma: on one side, lignin is an abundant source of renewable feedstock; one the other side, it is a highly complex and heterogeneous macromolecule. How to devise feasible strategy to extraction lignin from plant and make it into marketable product is one of the most important research topics. This dissertation, we presented a new strategy for lignin extraction and utilized the extracted lignin for advanced materials synthesis to fulfill lignin valorization. Deep eutectic solvents (DES) were applied to extract lignin from biomass, and the DES extracted lignin (DESL) obtained unique properties than other technical lignin. The extraction mechanism of DES treatment was evaluated through the lignin structure characterization. A new N-heterocycle DES was designed to produce lignin with controlled properties at high yields and purity which provide an unprecedented strategy for lignin extraction. DESL produced from this thesis work was applied to substitute petroleum phenolics to synthesize renewable porous gel materials. The potential DESL to fuel conversion was also evaluated by representative lignin derived dicarboxylic acids. The new insights gained in this dissertation inspired the development of lignin production and valorization.
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Details
- Title
- DESIGN AND EVALUATE DEEP EUTECTIC SOLVENTS LIGNIN EXTRACTION FOR ADVANCED MATERIAL APPLICATIONS
- Creators
- Kuan-Ting Lin
- Contributors
- XIao Zhang (Advisor)Feng Gao (Committee Member)Peter H. Pfromm (Committee Member)Steven R Saunders (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Voiland College of Engineering and Architecture
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Number of pages
- 182
- Identifiers
- 99900581610001842
- Language
- English
- Resource Type
- Dissertation