Energy and carbon assessment of advanced bioethanol-based fuel pathways for low-carbon passenger vehicle mobility in Brazil

ブラジルの低炭素乗用車モビリティ向け高度バイオエタノールベース燃料経路のエネルギーと炭素評価 (AI 翻訳)

N.P.G. Salau, T.D.M. Lanzanova, J. L. S. FAGUNDEZ, F.F. Rovai, L.C.M. Gomes, R.T.G. Guilherme, M.E.S. Martins

Fuel📚 査読済 / ジャーナル2026-06-04#再生可能エネルギー

DOI: 10.1016/j.fuel.2026.140172

原典: https://doi.org/10.1016/j.fuel.2026.140172

🤖 gxceed AI 要約

日本語

この研究は、ブラジルのフレックス燃料車向けに、エタノールと合成ガソリン（eGasoline）を混合した低炭素燃料E93eG7の環境性能を評価した。ライフサイクル評価により、特に第2世代エタノールを使用した場合、従来のガソリン（E30）と比較してCO2排出量を68.2%削減できることを示した。また、eGasolineの高エネルギー密度により航続距離が8.21%向上する。

English

This study evaluates the environmental performance of E93eG7, a low-carbon blend of ethanol and synthetic gasoline (eGasoline), for Brazil's flex-fuel vehicles. Lifecycle assessment shows that using second-generation ethanol feedstock can reduce CO2 emissions by 68.2% compared to conventional gasoline (E30), while also improving vehicle range by 8.21% due to higher energy density.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本ではバイオエタノールや合成燃料（e-fuel）の導入が進んでおり、本論文のエタノールと合成ガソリンの混合による排出削減効果は参考になる。特に、第二世代エタノールの活用や航続距離向上の結果は、日本の燃料政策や自動車業界にとって重要な示唆を含む。

In the global GX context

This paper provides a detailed well-to-tank analysis of advanced bioethanol-synthetic gasoline blends, demonstrating significant GHG reductions. It contributes to the global discussion on low-carbon fuel pathways, especially for flex-fuel vehicle fleets. The findings on second-generation feedstocks and energy density improvements are relevant for countries with high ethanol blending.

👥 読者別の含意

🔬研究者:This study offers a comprehensive well-to-tank analysis methodology for advanced bioethanol-synthetic gasoline blends, with detailed lifecycle emission factors that can inform further research on low-carbon transport fuels.

🏢実務担当者:Automotive and fuel companies can use these findings to assess the viability of blending synthetic gasoline with ethanol to reduce fleet emissions while maintaining vehicle range.

🏛政策担当者:Regulators in Brazil and other ethanol-producing countries can leverage this analysis to design fuel blending mandates that maximize GHG reductions and energy efficiency.

📄 Abstract（原文）

Brazil’s light-duty fleet is predominantly flex-fuel and already operates with high-ethanol blends. Further greenhouse gas (GHG) mitigation can be achieved by coupling ethanol with low-carbon synthetic gasoline intermediates. This study investigates the environmental and energy performance of the renewable fuel blend E93eG7, composed of 93% w/w anhydrous ethanol (E100) and 7% w/w synthetic gasoline (eGasoline) produced via the Ethanol-to-Gasoline (ETG) process. Three synthetic gasoline pathways were evaluated, based on different ethanol feedstocks: first-generation corn ethanol (EtOH 1G-C), first-generation sugarcane ethanol (EtOH 1G-S), and second-generation sugarcane bagasse ethanol (EtOH 2G-S). Well-to-tank (WTT) carbon intensity values were combined with vehicle fuel-consumption data to estimate per-kilometer and lifetime CO 2 eq emissions under Brazil-specific conditions. Fossil Brazilian type C Gasoline (E30) exhibited the highest emissions (124.25 g CO 2 eq km −1 ), whereas Hydrous Ethanol Fuel (HEF) and E100 showed substantially lower emissions (41.60 g CO 2 eq km −1 and 40.97 g CO 2 eq km −1 , respectively). The E93eG7 blends achieved intermediate emissions strongly influenced by the ethanol feedstock: EtOH 1G-C (42.37 g CO 2 eq km −1 ), EtOH 1G-S (41.63 g CO 2 eq km −1 ), and EtOH 2G-S (39.53 g CO 2 eq km −1 ). Over a 200,000 km vehicle lifetime, E93eG7 2G-S reduced cumulative emissions to 7.91 t CO 2 eq, representing a 68.2% reduction compared to E30 (24.85 t CO 2 eq). Furthermore, E93eG7 2G-S increased vehicle autonomy by 8.21% relative to HEF due to the higher energy density of its eGasoline fraction. These results demonstrate that blending ethanol with a small fraction of synthetic gasoline—particularly derived from second-generation feedstocks—can simultaneously improve energy efficiency and reduce greenhouse gas emissions, providing a viable low-carbon fuel option for Brazil’s light-duty vehicle fleet under the assumed Brazilian 2024 electricity mix and 200,000 km lifetime.

🔗 Provenance — このレコードを発見したソース

openalex https://doi.org/10.1016/j.fuel.2026.140172first seen 2026-06-06 04:54:47

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