Graforce plasma electrolysis for environment friendly era of hydrogen from industrial waste water; partnering with Audi

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Berlin-based Graforce Hydro GmbH, the developer of a plasma electrolyzer—the Plasmalyzer—is making use of its expertise for the extremely environment friendly era of hydrogen from industrial waste water.


Mixing in biogas produces hydrogen-enriched compressed pure gasoline (HCNG)—an economical, environmentally pleasant gasoline for autos that additionally generates electrical energy and warmth. The expertise not solely converts wastewater pollution into worthwhile power, but in addition reduces emissions (CO2, CO, HC) by 30 to 60 %. Nitrogen oxide emissions are additionally decreased by as much as 60%. Graforce’s companions embrace carmaker Audi and Berliner Wasserbetriebe.

The expertise we’ve developed is able to cleansing wastewater and producing a low-cost, low-emission gasoline from it. This lets us contribute to fixing two urgent issues directly: air air pollution and wastewater remedy.

—Graforce founder Dr. Jens Hanke

The brand new plasma electrolyzer expertise relies on a change within the impact of radiation on matter. In a high-frequency plasma course of, reactive species are produced because of electron-molecule interactions that provoke reactions at ambient temperatures that may in any other case solely happen at considerably larger temperatures.

This enables each dissociative electron attraction and dissociative excitations of course of gases and water, and likewise plasma-chemical synthesis processes. The mixed use of various plasma inductors is resulting in a brand new crossover expertise within the type of plasma processing.

The present Plasmalyzer provides extremely environment friendly water splitting. Which means that hydrogen might be produced from water, in distinction to electrolysis processes at the moment available on the market, at an reasonably priced value utilizing regenerative electrical energy for round €three/kg as an alternative of €6-Eight/kg (assuming electrical energy prices of €zero.08 per kWh).

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Furthermore, in contrast to different processes, it doesn’t require the water to be purified; that signifies that non-purified water may also be used.

Graforce is producing hydrogen utilizing the plasmalysis course of in its demonstration plant in Berlin. The method makes use of electrical energy to separate wastewater obtained from biogas, sewage remedy and industrial vegetation into oxygen and hydrogen. Mixing hydrogen with biogas produces HCNG, which can be utilized as gasoline in pure gasoline autos and in block heating and gasoline energy vegetation. Solely purified water and oxygen stay as waste merchandise.

German carmaker Audi has additionally been dedicated for a few years to different, artificial fuels. One of many largest challenges to e-fuel manufacturing is the wastewater produced by biogas vegetation. It requires very costly cleansing or disposal.

Integrating plasmalysis expertise into Audi’s e-fuel vegetation repurposes the wastewater into hydrogen manufacturing whereas purifying it on the identical time. This allows Audi’s programs for use extra effectively.

Graforce’s plasmalysis is a crucial contribution to low-emission gasoline manufacturing whereas boosting the economic system and effectivity of biogas and power-to-gas vegetation.

—Dr. Hermann Pengg, Head of Challenge Administration for Renewable Fuels at Audi and CEO of Audi Industriegas GmbH

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