Chemodivergent hydrogenolysis of eucalyptus lignin with Ni@ZIF-8 catalyst,Green Chemistry

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Chemodivergent hydrogenolysis of eucalyptus lignin with Ni@ZIF-8 catalyst
Green Chemistry ( IF 9.3 ) Pub Date : 2019-02-15 , DOI: 10.1039/c8gc03511c
Xue Liu _{1,

2,

3,

4} , Helong Li _{1,

2,

3,

4} , Ling-Ping Xiao _{4,

5,

6,

7} , Run-Cang Sun _{4,

5,

6,

7} , Guoyong Song _{1,

2,

3,

4}

Affiliation

Reductive catalytic fractionation (RCF) of lignocellulosic biomass, that is depolymerization of the native lignin component into well-defined monomeric phenols in the first step, offers an opportunity to utilize entire biomass components. Herein, we report that Ni@ZIF-8 can serve as a chemodivergent catalyst in RCF of eucalyptus sawdust, thus selectively producing phenolic compounds having either a propyl or propanol end-chain under different reaction conditions. In both cases, high yields of lignin monomers and a high degree of delignification were achieved, next to well-preserved carbohydrate pulp suitable for further processing. A mechanistic study using model compounds indicated that the dehydroxylation at the γ-position of the β-O-4 structure may be involved in the selectivity-controlling step.

中文翻译：

Ni @ ZIF-8催化剂对桉树木质素的化学发散氢解

木质纤维素生物质的还原催化分馏（RCF），即第一步将天然木质素组分解聚为定义明确的单体酚，提供了利用全部生物质组分的机会。本文中，我们报道Ni @ ZIF-8可以用作桉木锯屑RCF中的化学发散催化剂，从而在不同的反应条件下选择性地生产具有丙基或丙醇端链的酚类化合物。在这两种情况下，仅保存良好的碳水化合物浆粕都适合进一步加工，木质素单体的产量高且脱木素度高。使用模型化合物的机理研究表明，β- O -4结构的γ位上的脱羟基作用可能与选择性控制步骤有关。

更新日期：2019-03-19

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