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Purpose of Review <p>Second-generation (2G) bioethanol produced from lignocellulosic biomass is green liquid transportation fuel. Manufacture and use of 2G bioethanol involves several stages. Hence, the impact of 2G bioethanol on all segments of ecosystem needs to be assessed. Life Cycle Assessment (LCA) accounts for the complete environmental impact of 2G bioethanol using several factors. This review has presented an overview and analysis of recent literature on LCA of 2G bioethanol.</p> Recent Findings <p>Recent LCA studies reveal reduction in GHG emissions with bioethanol-blended gasoline. The net energy ratio of bioethanol is &gt; 1. However, bioethanol's acidification and eutrophication potential is high due to chemicals used during crop cultivation and biomass pretreatment. LCA studies also suggest use of lignin for electricity co-generation for closed carbon cycle.</p> Summary <p>LCA analysis reveals that use of renewable resources during bioethanol manufacture (solar/wind electricity and biofertilizers) can enhance the sustainability of 2G ethanol.</p>

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2G Bioethanol for Sustainable Transport Sector: Review and Analysis of the Life Cycle Assessments

  • 期刊论文

  • 发表日期：

    2025年1月22日

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  • Umesh,
  • Vijayanand Suryakant Moholkar

摘要

Purpose of Review

Second-generation (2G) bioethanol produced from lignocellulosic biomass is green liquid transportation fuel. Manufacture and use of 2G bioethanol involves several stages. Hence, the impact of 2G bioethanol on all segments of ecosystem needs to be assessed. Life Cycle Assessment (LCA) accounts for the complete environmental impact of 2G bioethanol using several factors. This review has presented an overview and analysis of recent literature on LCA of 2G bioethanol.

Recent Findings

Recent LCA studies reveal reduction in GHG emissions with bioethanol-blended gasoline. The net energy ratio of bioethanol is > 1. However, bioethanol's acidification and eutrophication potential is high due to chemicals used during crop cultivation and biomass pretreatment. LCA studies also suggest use of lignin for electricity co-generation for closed carbon cycle.

Summary

LCA analysis reveals that use of renewable resources during bioethanol manufacture (solar/wind electricity and biofertilizers) can enhance the sustainability of 2G ethanol.