期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 5, 页码 2388-2399出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c08901
关键词
Lignin; acidolysis; model compounds; ReaxFF Molecular Dynamics; reaction mechanism; NEB profiles
资金
- European Research Council, ERC [638076]
- Talent Scheme (Vidi) - Netherlands Organisation for Scientific Research (NWO) [723.015.005]
- ERC Proof of Concept Grant
Acidolysis combined with stabilization of reactive intermediates is a powerful method for lignin depolymerization, leading to high yields of aromatic monomers. This study aims to elucidate key mechanistic questions using a combination of experimental and computional approaches.
Acidolysis in conjunction with stabilization of reactive intermediates has emerged as one of the most powerful methods of lignin depolymerization that leads to high aromatic monomer yields. In particular, stabilization of reactive aldehydes using ethylene glycol results in the selective formation of the corresponding cyclic acetals (1,3-dioxolane derivatives) from model compounds, lignin, and even from softwood lignocellulose. Given the high practical utility of this method for future biorefineries, a deeper understanding of the method is desired. Here, we aim to elucidate key mechanistic questions utilizing a combination of experimental and multilevel computational approaches. The multiscale computational protocol used, based on ReaxFF molecular dynamics, represents a realistic scenario, where a typical experimental setup can be reproduced confidently given the explicit molecules of the solute, catalyst, and reagent. The nudged elastic band (NEB) approach allowed us to characterize the key intermolecular interactions involved in the reaction paths leading to crucial intermediates and products. The high level of detail obtained clearly revealed for the first time the unique role of sulfuric acid as a proton donor and acceptor in lignin beta-O-4 acidolysis as well as the reaction pathways for ethylene glycol stabilization, and the difference in reactivity between compounds with different methoxy substituents.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据