ZSW produces climate-neutral LNG

The German research institute ZSW (Center for Solar Energy and Hydrogen Research Baden-Württemberg) has succeeded in producing synthetic liquid methane from hydrogen and air. The end product has the same properties as liquefied natural gas (LNG), but a neutral carbon footprint: for »eLNG«, electricity from renewable sources is used for the electrolysis of hydrogen (H2) and the capture of CO2 from the air. This is followed by methanation, i.e. the combination to methane (CH4), and then liquefaction.
According to ZSW, the steps upstream of liquefaction, which are already established in many »power-to-gas« projects (hydrogen electrolysis, CO2 capture, methanation), were also carried out with components developed in-house. Their combination and the addition of the further process step for liquefaction were the subject of the »eLNG from air« research project, which has been running for one and a half years. The process is now running in a »system demonstrator« on a laboratory scale, but can be »transferred to the industrial scale«. The institute is now seeking industrial partners.
Liquid methane has 600 times the energy density of gaseous methane and can thus be transported more efficiently. It can also be used instead of diesel as a fuel for shipping and heavy-duty transport and as an alternative to heating oil in industry.

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