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Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
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Electrofuel Synthesis from Variable Renewable Electricity: An Optimization-Based Techno-Economic Analysis.

Evan D Sherwin1

  • 1Department of Energy and Resources Engineering, Stanford University, 367 Panama Street, Stanford California 94305, United States.

Environmental Science & Technology
|May 13, 2021
PubMed
Summary
This summary is machine-generated.

Electrofuels offer a potential low-carbon liquid fuel solution for sectors like aviation. Economic viability depends on reducing costs for direct air capture, electrolyzers, and renewable energy, with potential for <$1/lge by 2050.

Keywords:
DACFischer-Tropschelectrofuelelectrolysisoptimizationsystems dynamicstechno-economic analysis

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Area of Science:

  • Energy Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Aviation and other sectors require low-carbon liquid fuels to reduce greenhouse gas emissions.
  • Electrofuels, synthesized from captured CO2 and green hydrogen, are a potential alternative to petroleum-based fuels.

Purpose of the Study:

  • To analyze the economic viability of producing hydrocarbon electrofuels using direct air capture (DAC) and electrolysis powered by renewable energy.
  • To project future costs and identify key factors influencing electrofuel affordability.

Main Methods:

  • An optimization-based techno-economic analysis was employed.
  • The study modeled electrofuel production costs using current and projected technology for DAC, electrolyzers, and renewable electricity generation.

Main Results:

  • Current electrofuel production costs exceed $4/liter of gasoline equivalent (lge).
  • Costs could decrease to $1.7-1.8/lge within a decade and below $1/lge by 2050.
  • Electrofuels are only projected to be cheaper than petroleum fuels with carbon sequestration in the long term (<$1/lge).

Conclusions:

  • Achieving low electrofuel costs requires significant capital cost reductions in DAC, electrolyzers, and renewable energy.
  • Operational flexibility, including storage and grid integration, is crucial for efficiently utilizing variable renewable electricity.
  • Substantial technological advancements and cost reductions are necessary for electrofuels to become economically competitive.