Using Captured CO2 to Store and Transport Renewable Energy and Create DME

Creating DME from hydrogen, CO2, and water to store and transport renewable energy. GTI is working on an Advanced Research Projects Agency-Energy (ARPA-E) project to develop a catalytic membrane reactor for synthesis of diesel fuel substitute dimethyl ether (DME) from hydrogen, CO2, and water. This carbon reuse process takes captured carbon dioxide and combines it with hydrogen to produce an energy-dense liquid fuel that is compatible with the pipeline infrastructure and end-use devices. The liquid fuel can then be used to store renewable energy that is easily transportable via pipeline or truck to sites with the greatest demand.

A 1 kg/day prototype has been built for long-term testing of fuel production, and test data is being captured. In a laboratory-scale membrane reactor DME synthesis testing, the DME production rate was three times higher than a packed bed reactor, and the CO2 conversion rate was 80% higher.

Benefits

  • This carbon reuse process produces an energy-dense liquid fuel that can be used to store renewable energy
  • Beneficial uses for CO2

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