Closing the Carbon Cycle – Demonstrating Back-Up Power Production from E-Fuels in Gensets and Recycling of the Engine Exhaust Gas

10 Pages Posted: 11 Nov 2024

Date Written: September 26, 2024

Abstract

For the first time the concept of back-up power production by combustion of a fuel blend using e-Fuels in a stationary engine (electric output 200 kW) and feeding back the exhaust gas of the engine upstream of an amine-based CO2 capture plant (capture capacity 7.2 t/day CO2 at a capture rate of 90%) was demonstrated at RWE’s Innovation Center at Niederaussem, Germany. The captured CO2 will be later the feedstock for the large 1 MW ECO2Fuel demonstrator to produce carbonaceous e-Fuels, which can again be used in the engine genset, closing the carbon loop. As the exhaust gas has an attractive high temperature level of >400°C that is typically for combined heat and power applications also the potential of the heat reuse and efficiency enhancement was investigated. The analysis and evaluation comprised especially the effect of the changes in the flue gas composition by the exhaust gas recycling (increased O2 and reduced CO2 concentration) on the capture plant performance (specific heat demand for the solvent regeneration, emissions; solvent CESAR1) and the potential of the set-up for combined heat and power applications.

Keywords: e-Fuels, CCU, closed carbon cycle, CESAR1, AMP, piperazine, amine, back-up power, security of supply, negative emissions

Suggested Citation

Moser, Peter and Stahl, Knut and Wiechers, Georg, Closing the Carbon Cycle – Demonstrating Back-Up Power Production from E-Fuels in Gensets and Recycling of the Engine Exhaust Gas (September 26, 2024). Proceedings of the 17th Greenhouse Gas Control Technologies Conference (GHGT-17) 20-24 October 2024, Available at SSRN: https://ssrn.com/abstract=5016150 or http://dx.doi.org/10.2139/ssrn.5016150

Peter Moser (Contact Author)

RWE Power AG ( email )

Altenessener Strasse 32
Essen, 45141
Germany

Knut Stahl

RWE Power AG

Huyssenallee 2
Essen, 45128
Germany

Georg Wiechers

RWE Power AG

Huyssenallee 2
Essen, 45128
Germany

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