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Lignocellulose biohydrogen towards net zero emission: A review on recent developments.

Chyi-How Lay1, Jeyaprakash Dharmaraja2, Sutha Shobana3

  • 1Master's Program of Green Energy Science and Technology, Feng Chia University, Taichung, Taiwan.

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Summary

Advanced pretreatment methods for lignocellulosic biomass are crucial for efficient bio-hydrogen (bio-H2) production. Stepwise pretreatment optimizes cellulose digestibility and minimizes inhibitory compounds for successful fermentation.

Keywords:
Bio–H(2)ChallengesLignocellulosic biomassNanotechnologyPretreatment

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Area of Science:

  • Biomass Pretreatment
  • Bioenergy Production
  • Hydrogen Generation

Background:

  • Lignocellulosic biomass is a sustainable feedstock for bioenergy.
  • Effective pretreatment is essential to overcome biomass recalcitrance.
  • Current methods face challenges in cost-effectiveness and inhibitor generation.

Purpose of the Study:

  • To review novel physical, chemical, physico-chemical, microbiological, and nanotechnology-based pretreatment techniques.
  • To assess the impact of these pretreatments on lignocellulosic biomass structure and cellulose digestibility.
  • To evaluate their efficacy in enhancing bio-hydrogen (bio-H2) production.

Main Methods:

  • Comprehensive literature review of advanced pretreatment strategies.
  • Analysis of pretreatment effects on biomass composition and structure.
  • Evaluation of cellulose digestibility and inhibitor formation.

Main Results:

  • Various pretreatment techniques offer distinct advantages and disadvantages.
  • Stepwise pretreatment approaches show promise for improved cellulose accessibility.
  • Inhibitory compound generation remains a significant challenge for bio-enzymatic processes.

Conclusions:

  • Optimized, stepwise pretreatment is key to successful lignocellulosic biomass fermentation for bio-H2.
  • Cost-effective, large-scale conversion requires further research to overcome current limitations.
  • Minimizing inhibitory byproducts is critical for efficient bio-H2 yields.