The aim of the plan­ned R&D pro­ject is to demons­tra­te CO₂ cap­tu­re from gas-fired indus­tri­al fur­naces. The solu­ti­on approach is based on oxy­fuel com­bus­ti­on of the fuel gas with pure oxy­gen (O₂). The exhaust gas thus con­sists main­ly of CO₂ and H₂O (steam), the lat­ter being con­den­sed. The requi­red oxy­gen is pro­du­ced on site with cera­mic mem­bra­nes, which are hea­ted with was­te heat. In high-tem­pe­ra­tu­re pro­ces­ses (> 1000 °C), signi­fi­cant­ly more pri­ma­ry ener­gy (fuel gas) should be saved by incre­asing the com­bus­ti­on effi­ci­en­cy than the addi­tio­nal elec­tri­cal ener­gy requi­red for O₂ sepa­ra­ti­on. Thus, with the typi­cal elec­tri­cal ener­gy requi­re­ment of the mem­bra­ne sepa­ra­ti­on pro­cess, a savings ratio of 15:1 is alre­a­dy achie­ved at 1000 °C, i.e. 1 kWh of elec­tri­cal ener­gy for O₂ gene­ra­ti­on saves 15 kWh of fuel. In con­trast to the other CO₂ sepa­ra­ti­on pro­ces­ses, the­r­e­fo­re, no addi­tio­nal ener­gy would be requi­red for CO₂ sepa­ra­ti­on, but ener­gy (in the form of fuel) would even be saved and the amount of CO₂ redu­ced at the same time.

The tasks of the part­ners in the joint pro­ject lead to the fol­lo­wing subprojects:

• Nume­ri­cal and expe­ri­men­tal inves­ti­ga­ti­on of the mem­bra­ne plant as well as ener­ge­tic opti­miza­ti­on during ope­ra­ti­on (IOB)
• Con­cep­ti­on of a O₂ mem­bra­ne plant with varia­ble through­put and opti­miza­ti­on of the pro­duc­tion of O₂mem­bra­nes (IKTS)
• Ther­mal design and imple­men­ta­ti­on of the cou­pling bet­ween a power-saving mem­bra­ne plant for oxy­gen pro­duc­tion and an indus­try-ori­en­ted high-tem­pe­ra­tu­re oxy­fuel labo­ra­to­ry fur­nace for the pro­duc­tion of CCU-capa­ble exhaust gas in con­ti­nuous ope­ra­ti­on (MES)
• Design, engi­nee­ring and fabri­ca­ti­on of the mem­bra­ne plant com­pon­ents (HA)