木质纤维素生物质中的乙二醇：木质素对催化氢解的影响,Industrial & Engineering Chemistry Research

当前位置： X-MOL 学术 › Ind. Eng. Chem. Res. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

木质纤维素生物质中的乙二醇：木质素对催化氢解的影响
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-05-06 , DOI: 10.1021/acs.iecr.1c01063
T.D.J. te Molder ₁ , S.R.A. Kersten ₁ , J. P. Lange _{1,

2} , M. P. Ruiz ₁

Affiliation

短的多元醇，例如乙二醇（EG），是糖类催化氢解的普遍目标。但是，关于使用未处理或预处理的木质纤维素生物质作为生产多元醇的原料的研究很少。在这项工作中，我们研究了木质素对以乙二醇为代表的不同生物量样品催化氢解的影响。我们首先开发了对木质素和原料杂质（如灰分和提取物）敏感的氢解方案。通过对杨木，松树和干草进行溶剂基（水/乙醇/乙酸）预处理以及制备纯微晶纤维素与有机溶剂木质素的物理混合物，已评估了木质素含量不同的生物质原料的基质。木质素似乎抑制了氢化催化剂阮内镍的活性，在有和没有钨酸盐催化剂的情况下，通过阻碍糖醇的形成来抑制糖醇的形成。然而，木质素并不是未处理的木质纤维素通常会导致EG产量低的根本原因，因为处理过的木质纤维素可提供较高的EG产量（30–35 wt％），而与木质素浓度在0至44 wt％之间变化的情况无关。相同的苛刻实验条件。

"点击查看英文标题和摘要"

Ethylene Glycol from Lignocellulosic Biomass: Impact of Lignin on Catalytic Hydrogenolysis

Short polyols, such as ethylene glycol (EG), are a popular target of catalytic hydrogenolysis of saccharides. However, studies on the use of untreated or pretreated lignocellulosic biomass as feedstock for polyol production are scarce. In this work, we have studied the impact of lignin on the catalytic hydrogenolysis of different biomass samples, targeting ethylene glycol. We first developed a hydrogenolysis protocol that is sensitive to lignin and feedstock impurities, such as ash and extractives. A matrix of biomass feedstocks with varying lignin content has been evaluated, by subjecting poplar, pine, and hay to solvent-based (water/ethanol/acetic acid) pretreatments and by preparing physical mixtures of pure microcrystalline cellulose with organosolv lignin. Lignin appeared to inhibit the activity of the hydrogenation catalyst, Raney-Ni, by hindering the formation of sugar alcohols in the presence as well as in the absence of the tungstate catalyst. However, lignin is not the root cause for the low EG yield typically obtained with untreated lignocellulose, as treated lignocellulose delivered high EG yields (30–35 wt %), irrespective of the lignin concentrations, which varied between 0 and 44 wt %, under identical demanding experimental conditions.

更新日期：2021-05-19

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南