Evoking research attention back on liquid hot water pretreatment: a comprehensive review

IF 9.2 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2025-03-20 DOI:10.1039/d5gc00219b

Chen Huang , Xuelian Zhou , Yunni Zhan , Xianzhi Meng , Guigan Fang , Zhe Ling , Lingfeng Long , Arthur J. Ragauskas

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引用次数: 0

Abstract

Refining lignocellulose into energy, chemicals, and materials offers a possible approach to replace petrochemicals. After biomass chipping, pretreatment is the first and foremost step in biomass processing, as it causes successful fractionation of cellulose, hemicellulose, and lignin to realize their individual conversion. Numerous solvents have been proposed as media for biomass pretreatment, which generally utilize chemicals to accelerate biomass dissolution and inevitably cause environment pollution. In this regard, green liquid hot water pretreatment (LHWP) using water as the sole medium seems to be a perfect technology. However, research on LHWP has diminished in recent years owing to the emergence of other advanced solvents. To draw attention back on LHWP, this review provides a comprehensive discussion of its mechanism, application potential, and advances compared to other solvents. In particular, the structural changes of the biomass during LHWP are discussed in detail which has been seldom considered in other reviews. Finally, the challenges and perspectives of LHWP are also analyzed. Overall, the authors believe that LHWP should be considered not only for bioethanol production but also as a route for biomass fractionation, which could contribute to establishing a modern biorefinery for various coproducts based on cellulose, hemicellulose, and lignin.

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液体热水预处理的研究现状与展望

将木质纤维素提炼成能源、化学品和材料提供了一种替代石化产品的可能方法。生物质切屑后，预处理是生物质加工的第一步，也是最重要的一步，因为它可以使纤维素、半纤维素和木质素成功分离，实现各自的转化。许多溶剂被提出作为生物质预处理的介质，这些介质一般利用化学物质加速生物质溶解，不可避免地造成环境污染。在这方面，以水为唯一介质的绿色液体热水预处理（LHWP）似乎是一种完美的技术。然而，近年来由于其他先进溶剂的出现，对LHWP的研究有所减少。为了引起人们对LHWP的关注，本文综述了LHWP的机理、应用潜力以及与其他溶剂相比的研究进展。特别地，本文详细地讨论了其他文献很少考虑的LHWP过程中生物量的结构变化。最后，对LHWP面临的挑战和前景进行了分析。总的来说，作者认为LHWP不仅应该用于生物乙醇生产，而且应该作为生物质分馏的途径，这可能有助于建立基于纤维素、半纤维素和木质素的各种副产物的现代生物精炼厂。

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

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.