公开(公告)号：US20240343564A1

公开(公告)日：2024-10-17

申请号：US18683136

申请日：2022-08-03

Applicant: BASF SE

Inventor： Carsten HENSCHEL ,  Otto MACHHAMMER ,  Andreas FUESSL

IPC: C01B3/32 ,  C01B3/50 ,  H01M8/0606

CPC classification number: C01B3/323 ,  C01B3/505 ,  C01B2203/0205 ,  C01B2203/0283 ,  C01B2203/0405 ,  C01B2203/066 ,  C01B2203/0827 ,  C01B2203/1223 ,  C01B2203/1294 ,  H01M8/0606

Abstract: A process for obtaining hydrogen from methanol or ammonia, for fuel cell operation, for example, wherein methanol or ammonia is subjected to evaporation in a first step and in a second step to reforming to give a hydrogen-containing gas mixture, in a third step hydrogen is removed from this gas mixture in a membrane process at a temperature of 300 to 600° C. and in a fourth step the gaseous retentate from the membrane process is burned with ambient air, wherein the second step is a process step upstream of and separate from the third step and the combustion gases are routed via at least two different heat exchangers to provide (i) first the reaction heat for reforming the methanol or ammonia and (ii) then the evaporation heat for evaporating the reformer feed, wherein the permeate from the membrane process preheats the ambient air for the burner in a heat exchanger

公开(公告)号：US20230111285A1

公开(公告)日：2023-04-13

申请号：US17914371

申请日：2021-03-26

Applicant: BASF SE

Inventor： Carsten HENSCHEL ,  Otto MACHHAMMER ,  Andreas FUESSL

IPC: B01D53/22 ,  B01D53/32

Abstract: The present invention comprises a one-stage membrane process for electrochemical separation of hydrogen from natural gas streams in a pipeline (1) having a positive pressure in the range from 50 mbar to 100 bar, having the following process steps: (i) a gas substream (2) is drawn off from the natural gas stream in a pipeline (1) without any change in the gas composition, where the mass flow rate of the gas substream is adjusted depending on the hydrogen content in the natural gas stream (1) such that a depletion level of 0.65 to 0.975 is established in the case of a hydrogen concentration of 10% by weight, where the depletion level is defined as the quotient of the desired molar H2 product stream (6) and the molar H2 reactant flow rate in the gas substream at the inlet of the membrane unit (2), (ii) this gas substream (2) is compressed (3) upstream of a membrane unit (5), (iii) this gas substream is heated to 100 to 250° C. either upstream of the membrane unit or in the membrane unit, and this gas substream is supplied with water (4) upstream of the membrane unit and/or on the permeate side of the membrane unit (4a), such that the water loading is between 0.005 and 0.2 mol of water/mol of natural gas, (iv) this gas substream is sent to an electrochemical membrane unit in which hydrogen is separated off as permeate (6a) at a temperature of 100 to 250° C., (v) the retentate (8) from the membrane unit is recycled into the natural gas stream, sent to a chemical utilization and/or used as fuel. The present invention further comprises a method of ascertaining the optimized gas substream which is drawn off from a pipeline that conducts natural gas and hydrogen in order to separate hydrogen from this gas substream in an electrochemical membrane unit.

公开(公告)号：US20220306462A1

公开(公告)日：2022-09-29

申请号：US17771131

申请日：2020-10-15

Applicant: BASF SE

Inventor： Carsten HENSCHEL ,  Andreas FUESSL ,  Otto MACHHAMMER ,  Sigmar BRAEUNINGER

IPC: C01B3/30 ,  C01B3/50 ,  B01D53/32

Abstract: The present invention comprises a process for producing hydrogen, wherein in a first stage hydrocarbons are decomposed into solid carbon and into a hydrogen-containing gaseous product mixture, the hydrogen-containing gaseous product mixture, which has a composition in respect of the main components CH4, N2, and H2 of 20% to 95% by volume H2 and 80% to 5% by volume CH4 and/or N2, is discharged from the first stage at a temperature of 50 to 300° C., and this is supplied at a temperature differing from this exit temperature by not more than 100° C. to an electrochemical separation process and, in this second stage, the hydrogen-containing product mixture is separated in the electrochemical separation process at a temperature of 50 to 200° C. into hydrogen having a purity of >99.99% and a remaining residual gas mixture.