公开(公告)号：US20240295040A1

公开(公告)日：2024-09-05

申请号：US18574030

申请日：2022-07-13

Applicant: Topsoe A/S

Inventor： Rainer KÜNGAS ,  Bengt Peter Gustav BLENNOW ,  Thomas HEIREDAL-CLAUSEN ,  Jeppe RASS-HANSEN ,  Tobias Holt NØRBY

IPC: C25B15/00 ,  C25B1/042 ,  C25B9/77

CPC classification number: C25B15/00 ,  C25B1/042 ,  C25B9/77

Abstract: The invention relates to a method for transient operation of a solid oxide electrolysis cell (SOEC) stack having a cathode side and an anode side, the method comprising: supplying a flush gas comprising CO2 to said anode side; and applying a small electrolysis current of 0.001-0.05 A/cm2 active cell area, such as 0.01-0.05 A/cm2 active cell area, to the cells in the SOEC stack, for thereby generating oxygen in the anode side or for transporting to the anode side any oxygen already available in the cathode side. The method comprises also operating the SOEC stack during shut-down with a flush gas comprising CO2 on the anode side, and recycling anode product gas comprising oxygen being generated under prior normal operation of the SOEC stack, with no small current being applied. By the invention it is possible to generate small amounts of O2 to safeguard the pO2 and stability of the oxy-electrode in the anode side. The invention provides protection of not only the oxy-electrode, but also the fuel electrode in the cathode side.

公开(公告)号：US20230069515A1

公开(公告)日：2023-03-02

申请号：US17795763

申请日：2021-02-05

Applicant: TOPSOE A/S

Inventor： Bengt Peter Gustav BLENNOW ,  Rainer KÜNGAS ,  Jeppe RASS-HANSEN ,  Tobias Holt NØRBY ,  Thomas HEIREDAL-CLAUSEN ,  Poul Georg MOSES ,  John Bøgild HANSEN

IPC: C25B15/08 ,  C25B1/02 ,  C25B1/042 ,  C25B1/23 ,  C25B9/19 ,  C25B13/07 ,  C25B15/02

Abstract: In a method for supplying oxygen-enriched gas to an oxygen consuming process, in which the oxygen-enriched gas with a low nitrogen content is generated by supplying an anode-side feed gas comprising CO2 to the anode side of a solid oxide electrolysis cell, oxygen is generated on the anode side of the solid oxide electrolysis cell. This way, an anode-side product gas is formed, in which the oxygen-enriched gas comprises at least a part. The oxygen-enriched gas has a low nitrogen content, and the temperature of the oxygen-enriched gas exiting the solid oxide electrolysis cell is between 600 and 1000° C. The method has multiple advantages, first of all as regards energy saving.

公开(公告)号：US20240191370A1

公开(公告)日：2024-06-13

申请号：US18286429

申请日：2022-05-06

Applicant: TOPSOE A/S

Inventor： Tobias Holt NØRBY ,  Rainer KÜNGAS ,  Bengt Peter Gustav BLENNOW ,  Jeppe RASS-HANSEN ,  Thomas HEIREDAL-CLAUSEN ,  Louis SADOWSKI-CAVICHIOLO

IPC: C25B9/65 ,  C25B1/042 ,  C25B1/23 ,  C25B9/77 ,  C25D3/12 ,  C25D3/38 ,  C25D5/12 ,  C25D5/50 ,  H01M8/021 ,  H01M8/0215 ,  H01M8/0228 ,  H01M8/12

CPC classification number: C25B9/65 ,  C25B1/042 ,  C25B1/23 ,  C25B9/77 ,  C25D3/12 ,  C25D3/38 ,  C25D5/12 ,  C25D5/50 ,  H01M8/021 ,  H01M8/0215 ,  H01M8/0228 ,  H01M2008/1293

Abstract: The present invention regards a high-temperature resistant interconnect structure for conducting an electrical current, the structure comprising a bulk layer of ferritic stainless steel; a nickel based metal oxide layer; and a surface layer interposed between the bulk layer and the nickel-rich metal oxide layer; where the surface layer comprises an austenitic phase and a discontinuous silicon oxide phase. It also regards a method of preparing the interconnect structure, an interconnect precursor structure as well as a SOC stack and a method of preparing the stack and uses of the stack as SOEC and SOFC.

公开(公告)号：US20240035169A1

公开(公告)日：2024-02-01

申请号：US18256652

申请日：2021-12-14

Applicant: TOPSOE A/S

Inventor： Rainer KÜNGAS ,  Thomas HEIREDAL-CLAUSEN ,  Jeppe RASS-HANSEN ,  Bengt Peter Gustav BLENNOW ,  Tobias Holt NØRBY

IPC: C25B1/23 ,  C25B15/08 ,  C25B15/027

CPC classification number: C25B1/23 ,  C25B15/085 ,  C25B15/027

Abstract: The present invention regards a method for converting carbon dioxide into carbon monoxide in high-temperature, dry, solid oxide electrolysis providing increased lifetime of SOECs and SOEC stacks by addressing the problem of coking, while simultaneously ensuring highest possible CO production from each cell or stack.