US 12,344,534 B2
Process for producing carbon fiber materials for separating CO2 or NH3 from gas mixtures, carbon fiber materials and its use
Hermann Tempel, Kreuzau (DE); Ansgar Karl Georg Kretzschmar, Aachen (DE); Victor Octavian Selmert, Aachen (DE); Henning Weinrich, Jülich (DE); Hans Kungl, Heidelberg (DE); and Rüdiger-A Eichel, Jülich (DE)
Assigned to Forschungszentrum Jülich GmbH, Jülich (DE)
Appl. No. 17/596,349
Filed by Forschungszentrum Jülich GmbH, Jülich (DE)
PCT Filed Jun. 3, 2020, PCT No. PCT/EP2020/065373
§ 371(c)(1), (2) Date Dec. 8, 2021,
PCT Pub. No. WO2020/249441, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 102019208643.8 (DE), filed on Jun. 13, 2019.
Prior Publication US 2022/0220639 A1, Jul. 14, 2022
Int. Cl. C01C 1/02 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); D01F 9/22 (2006.01); F01N 3/08 (2006.01); B01J 20/20 (2006.01); D06M 101/40 (2006.01)
CPC C01C 1/02 (2013.01) [B01J 20/28023 (2013.01); B01J 20/3085 (2013.01); D01F 9/22 (2013.01); F01N 3/0857 (2013.01); B01J 20/20 (2013.01); D06M 2101/40 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for separating NH3 from a gas mixture comprising N2, the method comprising passing the gas mixture through a separation column filled with a carbon fiber material, thereby separating the NH3 from the gas mixture, wherein the carbon fiber material has been produced by steps of
a) preparing a solution of polyacrylonitrile in an organic solvent, the solution consisting only of solvent and polyacrylonitrile,
b) electrospinning of the solution obtained in a) and drying of the obtained fiber material,
c) crosslinking of the obtained fiber material by heating to 150 to 350° C. in an air or oxygen atmosphere for 1 to 30 hours without applying tensile stress, and
d) carbonization of the obtained fiber material in an inert gas atmosphere at a temperature in the range of 800 to 850° C. for 1.5 to 5 hours without applying tensile stress, thereby producing the carbon fiber material.