期刊
BIORESOURCE TECHNOLOGY
卷 369, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.128413
关键词
Lignocellulosic biomass; Physicochemical pretreatment; Lignocellulose fractionation; Delignification; Biofuel
Emerging physicochemical pretreatment methods play a crucial role in efficient lignocellulose bioconversion and biofuel production by improving biomass accessibility and separating lignocellulosic biocomponents. These methods enable highly efficient lignocellulose bioconversion and contribute to addressing the global energy crisis by simplifying operation, reducing costs, and being environmentally friendly.
The inherent recalcitrance of lignocellulosic biomass is a significant barrier to efficient lignocellulosic biorefinery owing to its complex structure and the presence of inhibitory components, primarily lignin. Efficient biomass pretreatment strategies are crucial for fragmentation of lignocellulosic biocomponents, increasing the surface area and solubility of cellulose fibers, and removing or extracting lignin. Conventional pretreatment methods have several disadvantages, such as high operational costs, equipment corrosion, and the generation of toxic byproducts and effluents. In recent years, many emerging single-step, multi-step, and/or combined physicochemical pretreatment regimes have been developed, which are simpler in operation, more economical, and environmentally friendly. Furthermore, many of these combined physicochemical methods improve biomass bioaccessibility and effectively fractionate similar to 96 % of lignocellulosic biocomponents into cellulose, hemicellulose, and lignin, thereby allowing for highly efficient lignocellulose bioconversion. This review critically discusses the emerging physicochemical pretreatment methods for efficient lignocellulose bioconversion for biofuel production to address the global energy crisis.
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