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Lignin Hydrogenolysis
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Lignin Hydrogenolysis. |
| 개인저자 | Li, Yanding. |
| 단체저자명 | The University of Wisconsin - Madison. Biological Systems Engineering. |
| 발행사항 | [S.l.]: The University of Wisconsin - Madison., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 190 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-04B. Dissertation Abstract International |
| ISBN | 9781687903730 |
| 학위논문주기 | Thesis (Ph.D.)--The University of Wisconsin - Madison, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-04, Section: B.
Advisor: Ralph, John. |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | Hydrogenolysis is one of the most promising lignin valorization processes to produce carbon-neutral sustainable fuels and chemicals from the largest aromatic source on this planet-lignin. Due to its structural complexity, it is extremely difficult to study hydrogenolysis reactions directly on the lignin polymer. Thus, lignin model compounds play a crucial role in lignin chemistry research but, too often, oversimplified models result in misleading and sometimes completely erroneous results. The correct use of authentic lignin models, however, can help predict similar chemistry occurring on the lignin polymer, and further elucidate the reaction mechanisms and kinetics. In this dissertation, lignin chemistry, lignin model compounds, and lignin hydrogenolysis are reviewed. With the aid of lignin model compounds, both fundamental and practical aspects of lignin hydrogenolysis are investigated, under four primary research topics. 1) In a 'lignin-first' approach, an acetalization protection strategy was applied to fractionate lignin from biomass without the lignin condensation problems. Hydrogenolysis of the protected lignin gave a near-theoretical lignin monomers yield. 2) The concept of an "ideal lignin" was developed, and the C-lignin found in native vanilla seedcoat was shown to meet all criteria. Hydrogenolysis of this unique benzodioxane polymer produced a previously inconceivable 90% yield of catechyl monomers in which one monomer predominated by 90% selectivity. 3) A kinetic study was performed on the hydrogenolysis of 棺-ether lignin model compounds in a flow reactor revealing new details of the reactivity of phenolic end-units and etherified internal units in the polymer. A similar kinetic pattern is observed in lignin hydrogenolysis, and high yields of lignin monomers were obtained from real lignins in a continuous flow reactor |
| 일반주제명 | Plant sciences. Chemical engineering. Organic chemistry. |
| 언어 | 영어 |
| 바로가기 | 
: 이 자료의 원문은 한국교육학술정보원에서 제공합니다. |
