Linde Aktiengesellschaft

Hans Kistenmacher

Walter Schramm

Udo Lang

Berndt Hoerner

Helmut Kick

Mathias Mostertz

Hans Jurgen Maass

Karl Forchhammer

The invention relates to a method for biotechnological production of a hydrogen carrier. It is proposed to culture ammonium-producing cyanobacteria in which, by increasing the nitrogenase activity and/or blocking the utilization of ammonium in the cell metabolism and/or providing an exit mechanism for ammonium via the cell membrane, the ammonium yield is increased. The ammonia generated by the cyanobacteria is made available as a hydrogen carrier.

Method for biotechnological production of a hydrogen carrier

In the purification of a hydrogen stream contaminated with at least methane and ethane, e.g. a hydrogen cycle gas from a coal hydrogenation process, where the hydrogen stream is subjected to multistage partial condensation and separation of the respectively formed condensates, the improvement of subjecting the hydrogen stream under a pressure of above about 100 bar to the multistage partial condensation and separation of having in the final condensate 5-40 molar percent of ethane, thereby favorably altering the K-value of methane and its ease of removal from the hydrogen which is only altered in the manner desired when the process is conducted under pressures in excess of about 100 bar.

High pressure purification of hydrogen

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Planegg, Germany

Hans Kistenmacher