Extraction of Green Hydrogen at Fuel Cell Quality from Mixtures with Natural Gas
|Extraction of Green Hydrogen at Fuel Cell Quality from Mixtures with Natural Gas
|Year of Publication
|Liemberger W, Groß M, Miltner M, Prazak-Reisinger H, Harasek M
|Chemical Engineering Transactions
A hybrid process based on membrane and pressure swing adsorption for the extraction of green hydrogen from mixtures with natural gas at fuel cell quality is presented. The gas is supplied by the natural gas grid at high pressures (up to 60 bar). It is pre-enriched via membrane separation. Afterwards, a pressure swing adsorption (PSA) ensures the required product quality. All remaining components, separated by PSA, are returned to the grid. Beside the technological feasibility the influence of various process parameters (e.g. stage-cut, permeate conditions, PSA H2 recovery) is analysed. Moreover, the so called HylyPure® process is compared with a reference process (decentral hydrogen from electrolysis).