A Clean Methane ICE Concept with >45 % Efficiency for Hybrid Powertrains

Authors

Dr.-Ing. Emanuel Binder; Dr.-Ing. Panagiotis Grigoriadis; Dipl.-Ing. Marc Sens; Dr.-Ing. Jens Kitte; Alexej Schwindt, B.Sc.; Dipl.-Ing. Jürgen Trepohl; Dipl.-Ing. Lars Böttcher, IAV GmbH, Berlin, Germany

Summary

Methane-fueled powertrains are one of the few solutions able to significantly reduce the greenhouse gas emissions from mobility worldwide and what is even more important: it can do immediately.

There are three main ways to do so: first, 25 % CO2-reduction is possible by exploiting fossil methane’s lower carbon content. Second, up to 90 % with e-CH4 from renewable energy (PtG). And third, even more with bio-CH4 from bio-residuals (by avoiding CH4 which acts at 25x GWP and is esp. emitted by rotting cow dung) when considering a Well-to-Wheel balance. Furthermore, additional CH4 from subsequent methanation of electrolysis-H2 is easier to handle and allows the chemical storage of huge amounts of unsteady wind & solar energy in the already existing gas grid. And compared to liquid e-Fuels, primary energy demand is lower, and esp. in case of bio-CH4 producible at low costs. 
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