Reductive Catalytic Fractionation of C-Lignin 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
ACS Sustainable Chemistry & Engineering
年/卷/期
2018 / 6 / 9
页码
11211-11218
语言
eng
作者单位
MIT, Chem Engn, 25 Ames St, Cambridge, MA 02139 USA;MIT, Chem Engn, 25 Ames St, Cambridge, MA 02139 USA;Natl Renewable Energy Lab, 15013 Denver W Pkwy, Golden, CO 80401 USA;Natl Renewable Energy Lab, 15013 Denver W Pkwy, Golden, CO 80401 USA;Natl Renewable Energy Lab, 15013 Denver W Pkwy, Golden, CO 80401 USA;Univ North Texas, BioDiscovery Inst, 1155 Union Sq, Denton, TX 76203 USA;Univ North Texas, BioDiscovery Inst, 1155 Union Sq, Denton, TX 76203 USA;Natl Renewable Energy Lab, 15013 Denver W Pkwy, Golden, CO 80401 USA;MIT, Chem Engn, 25 Ames St, Cambridge, MA 02139 USA
作者
Stone, Michael L.;Anderson, Eric M.;Meek, Kelly M.;Reed, Michelle;Katahira, Rui;Chen, Fang;Dixon, Richard A.;Beckham, Gregg T.;Roman-Leshkoy, Yuriy
摘要
Lignin composed solely of caffeyl alcohol units, or C-lignin, was recently discovered in the seed coats of a number of vanilla orchid and cactus species. The caffeyl alcohol monomer polymerizes into a highly uniform benzodioxane backbone, making C-lignin a promising substrate for lignin valorization, where heterogeneity is a key challenge. In this study, we used reductive catalytic fractionation (RCF) on vanilla seeds to investigate the depolymerization of naturally grown C-lignin. To overcome challenges associated with the high extractive content and poor sugar retention in vanilla seeds, the ratio of monomer yield to total lignin yield was used to isolate the depolymerization efficiency of C-lignin from the extraction efficiency of lignin from seeds. This approach allowed us to compare extents of depolymerization across lignin types and biomass feedstocks. C-Lignin RCF generated extents of depolymerization akin to those of hardwoods, despite observing incomplete benzodioxane cleavage due to catalyst deactivation caused by the seed extractives. In addition, depolymerization of C-lignin produced a favorable monomeric product distribution consisting of only propyl and propenyl catechol. These promising results suggest that genetic modification of other plant species to incorporate C-lignin has the potential to yield a single, valuable catechol product via RCF.
机翻摘要
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关键词/主题词
Biomass conversion;Catechol;Benzodioxane;Vanilla seed;Lignin first;Hydrogenolysis;Solvolysis;Depolymerization
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