Device and method for depleting acidic gases from gas mixtures

摘要

The invention relates to a device and method for depleting acidic gases, in particular CO2, from gas mixtures, in particular respiratory gas, using hydroxide compounds and moisture absorbing substances in the form of super-absorbing polymer or vermiculite.

主权项

1. A closed or semi-closed circuit breathing apparatus for depleting carbon dioxide from a gas mixture, the breathing apparatus comprising
an absorber which contains as absorber material: carbon dioxide-absorbing substances, comprising at least one hydroxide compound comprising at least sodium hydroxide and at least an alkaline earth metal hydroxide; and water-absorbing substances, comprising a superabsorbent polymer (SAP) or vermiculite or both, wherein hydroxide compound(s) and superabsorbent polymer (SAP); or hydroxide compound(s) and vermiculite; or hydroxide compound(s) and superabsorbent polymer (SAP) and vermiculite form the absorber material, wherein water-absorbing substances and hydroxide compound(s) are each directly in contact with each other, wherein the gas mixture is breathing gas provided by an exhaling process being part of a breathing process, and the absorber is flown through by the breathing gas, wherein the absorber independently: a) has a layer structure comprising at least three different layers of the absorber material, wherein at least one layer is surrounded at least partially by two more other layers and the carbon dioxide-absorbing substances and the water-absorbing substances are present in the form of a powder or granules; b) is a mixed fill of particles comprising the absorber material and the carbon dioxide-absorbing substances and the water-absorbing substances are present in the form of a powder or granules; c) the superabsorbent polymer and the hydroxide compound or the vermiculite and the hydroxide compound or the superabsorbent polymer and the vermiculite and the hydroxide compound are applied to a support; d) the superabsorbent polymer or the vermiculite or both are applied to the hydroxide compound as a carrier, or vice versa; or e) the hydroxide compound and superabsorbent polymer or the hydroxide compound and the vermiculite or the hydroxide compound and the superabsorbent polymer and the vermiculite are each jointly incorporated into particles and the carbon dioxide-absorbing substances and the water-absorbing substances are present in the form of a powder or granules.