US 11,891,706 B2
Gas to hydrogen process with co-production of carbon
Romuald Coupan, Vanves (FR); Nikolai Nesterenko, Nivelles (BE); and Gleb Veryasov, Nivelles (BE)
Assigned to TOTALENERGIES ONETECH, Courbevoie (FR); and SULZER MANAGEMENT AG, Winterthur (CH)
Appl. No. 17/915,958
Filed by TOTALENERGIES ONETECH, Courbevoie (FR); and SULZER MANAGEMENT AG, Winterhur (CH)
PCT Filed Mar. 29, 2021, PCT No. PCT/EP2021/058138
§ 371(c)(1), (2) Date Sep. 29, 2022,
PCT Pub. No. WO2021/198168, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 20315076 (EP), filed on Mar. 30, 2020.
Prior Publication US 2023/0118848 A1, Apr. 20, 2023
Int. Cl. C25B 1/02 (2006.01); C01B 32/05 (2017.01); C25B 15/08 (2006.01); C01B 7/09 (2006.01); C25B 1/04 (2021.01); C25B 1/24 (2021.01); C01B 32/205 (2017.01); C25B 5/00 (2006.01)
CPC C25B 1/02 (2013.01) [C01B 7/093 (2013.01); C01B 32/05 (2017.08); C01B 32/205 (2017.08); C25B 1/04 (2013.01); C25B 1/24 (2013.01); C25B 15/085 (2021.01); C25B 5/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A process of conversion of gaseous stream comprising methane into hydrogen (51, 63) and carbon (25), said process is characterized in that it comprises the following steps:
a step (a) of providing a first gaseous stream (3, 7) comprising methane;
a step (b) of bromination and synthesis of carbon wherein the first gaseous stream (3, 7) comprising methane of step (a) is put in contact with a second stream (53, 95, 127) comprising bromine under operating conditions resulting in the formation of a third stream (15) comprising methyl bromides and hydrogen bromide, and of a fourth stream (25) comprising carbon including graphite and/or carbon black;
a step (c) of separation performed on the third stream (15) to recover a hydrogen bromide-rich stream (33, 41, 107) and a methyl bromides-rich stream (23), wherein the process comprises a step of recycling the methyl bromides-rich stream (23) into step (b) of bromination and synthesis of carbon; and
a step (d) of converting said hydrogen bromide-rich stream (33, 41, 107) into a stream (51, 63) comprising hydrogen and a stream (53, 95, 127) comprising bromine.