Method and facility system for providing an energy carrier by application of carbon dioxide as a carbon supplier of electric energy

摘要

The invention relates to methods and facility systems (100) for providing storable and transportable carbon-based energy carriers (108) by application of carbon dioxide (101) as a carbon supplier and by application of electric energy (E1, E2). The facility system (100) comprises a plant (300, 301; 400) for providing a first portion of energy in the form of direct current energy (E1) from renewable energy sources. In addition, a power supplies facility (501) is provided for tying the facility system (100) to a mixed network (500), wherein the power supplies facility (501) produces a second portion of energy in the form of direct current energy (E2) from an alternating current voltage of the mixed network (500). A device (102, 105) is adapted to provide hydrogen (103), wherein a part of the energy requirement of this device (102, 105) is covered by said first portion of energy and another part is covered by said second portion of energy. A carbon dioxide supply serves for introducing carbon dioxide (101) and a reaction area (106) is provided for producing a hydrocarbon, preferably methanol (108).

主权项

1. A method for providing storable and transportable energy carriers comprising the steps of:
providing carbon dioxide (CO2) as a carbon supplier, providing electric direct current energy which is generated using renewable energy technology, providing additional electric energy originating from a power plant operated by fossil fuel or from an electrical mixed network, performing an electrolysis by application of said electric direct current energy and said additional electric energy so as to produce hydrogen (H2) as an intermediate product, wherein the proportion of renewable electrical direct current energy and additional electric energy used for said electrolysis is regulated by a control device; and, bringing together said hydrogen (H2) and said carbon dioxide (CO2) to form methanol as a hydrocarbon-based energy carrier.