Optimization of the pre-treatment of white sawdust (Triplochiton scleroxylon) by the organosolv process for the production of bioethanol

IF 1.8 4区工程技术 Q4 ENERGY & FUELS

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles Pub Date : 2021-01-01 DOI:10.2516/OGST/2021004

Thierry Tchamba Tchuidjang, Eric Noubissie, A. Ali

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引用次数: 5

Abstract

The exploitation of our forests generates waste, amongst which sawdust produces approximately cubic meter per year. The objective of this work is to contribute to the improvement of the recovery process of this waste through the optimization of the pre-treatment stage of sawdust from Ayous (Triplochiton scleroxylon) by the organosolv process in order to produce bioethanol. To achieve this objective, Ayous sawdust was sampled and then characterized, followed by the pre-treatment through organosolv process. During pre-treatment, a composite experimental design centred on three factors (temperature, time, ethanol concentration) was used to study their effects on extraction of pentoses, reducing sugars and phenolic compounds. Analysis shows that Ayous sawdust contains 45.33 ± 5.5% cellulose, 30.32 ± 1.95% lignin and 20.03 ± 3.5% hemicellulose. To release the maximum of pentoses, reducing sugars and the minimum of phenolic compounds, an organosolv pre-treatment of this substrate should be carried out at 209.08 °C for 47.60 min with an ethanol–water ratio of 24.02%. Temperature is the factor having the most positive influence on the pre-treatment process whereas, ethanol concentration is not an essential factor. Organosolv pre-treatment is an effective process for delignification of the lignocellulosic structure of Ayous sawdust.

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有机溶剂法预处理白木屑制备生物乙醇的优化研究

我们对森林的开采产生了废物，其中木屑每年产生大约立方米。本研究的目的是通过优化有机溶剂法处理青玉木屑生产生物乙醇的预处理阶段，为改进该废弃物的回收工艺做出贡献。为了实现这一目标，我们对Ayous锯末进行了取样和表征，然后通过有机溶剂法进行预处理。在预处理过程中，采用以温度、时间、乙醇浓度为中心的复合实验设计，研究了三个因素对戊糖、还原糖和酚类化合物提取的影响。分析表明，Ayous木屑中纤维素含量为45.33±5.5%，木质素含量为30.32±1.95%，半纤维素含量为20.03±3.5%。为了释放最多的戊糖、还原糖和最少的酚类化合物，该底物应在209.08℃、47.60 min、乙醇-水比24.02%的条件下进行有机溶剂预处理。温度是对预处理过程影响最大的因素，而乙醇浓度不是重要因素。有机溶剂预处理是去除Ayous锯末木质纤维素结构的有效方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 工程技术-工程：化工

CiteScore

2.70

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： OGST - Revue d''IFP Energies nouvelles is a journal concerning all disciplines and fields relevant to exploration, production, refining, petrochemicals, and the use and economics of petroleum, natural gas, and other sources of energy, in particular alternative energies with in view of the energy transition. OGST - Revue d''IFP Energies nouvelles has an Editorial Committee made up of 15 leading European personalities from universities and from industry, and is indexed in the major international bibliographical databases. The journal publishes review articles, in English or in French, and topical issues, giving an overview of the contributions of complementary disciplines in tackling contemporary problems. Each article includes a detailed abstract in English. However, a French translation of the summaries can be provided to readers on request. Summaries of all papers published in the revue from 1974 can be consulted on this site. Over 1 000 papers that have been published since 1997 are freely available in full text form (as pdf files). Currently, over 10 000 downloads are recorded per month. Researchers in the above fields are invited to submit an article. Rigorous selection of the articles is ensured by a review process that involves IFPEN and external experts as well as the members of the editorial committee. It is preferable to submit the articles in English, either as independent papers or in association with one of the upcoming topical issues.