Liquid hot water as sustainable biomass pretreatment technique for bioenergy production: A review

Wei Hsin Chen, Sandro Nižetić, Ranjna Sirohi, Zuohua Huang, Rafael Luque, Agis M.Papadopoulos, R. Sakthivel, Xuan Phuong Nguyen, Anh Tuan Hoang

Research output: Contribution to journalReview articlepeer-review

71 Citations (Scopus)


In recent years, lignocellulosic biomass has emerged as one of the most versatile energy sources among the research community for the production of biofuels and value-added chemicals. However, biomass pretreatment plays an important role in reducing the recalcitrant properties of lignocellulose, leading to superior quality of target products in bioenergy production. Among existing pretreatment techniques, liquid hot water (LHW) pretreatment has several outstanding advantages compared to others including minimum formation of monomeric sugars, significant removal of hemicellulose, and positive environmental impacts; however, several constraints of LHW pretreatment should be clarified. This contribution aims to provide a comprehensive analysis of reaction mechanism, reactor characteristics, influencing factors, techno-economic aspects, challenges, and prospects for LHW-based biomass pretreatment. Generally, LHW pretreatment could be widely employed in bioenergy processing from biomass, but circular economy-based advanced pretreatment techniques should be further studied in the future to achieve maximum efficiency, and minimum cost and drawbacks.

Original languageEnglish
Article number126207
JournalBioresource technology
Publication statusPublished - 2022 Jan

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal


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