US 12,421,465 B2
Gasification process employing acid gas recycle
François-Xavier Pascal Thierry Chiron, Aigremont (FR)
Assigned to HALDOR TOPSØE A/S, Kgs. Lyngby (DK)
Appl. No. 16/323,819
Filed by HALDOR TOPSØE A/S, Kgs. Lyngby (DK)
PCT Filed Oct. 3, 2017, PCT No. PCT/EP2017/075029
§ 371(c)(1), (2) Date Feb. 7, 2019,
PCT Pub. No. WO2018/072989, PCT Pub. Date Apr. 26, 2018.
Claims priority of application No. PA 2016 00633 (DK), filed on Oct. 17, 2016.
Prior Publication US 2021/0284927 A1, Sep. 16, 2021
Int. Cl. C10K 1/00 (2006.01); C10J 3/84 (2006.01); C10K 1/04 (2006.01); C10K 1/08 (2006.01); C10K 1/34 (2006.01); C10K 3/04 (2006.01)
CPC C10K 1/004 (2013.01) [C10J 3/84 (2013.01); C10K 1/046 (2013.01); C10K 1/08 (2013.01); C10K 1/34 (2013.01); C10K 3/04 (2013.01); C10J 2300/092 (2013.01); C10J 2300/0946 (2013.01); C10J 2300/0956 (2013.01); C10J 2300/0976 (2013.01); C10J 2300/0986 (2013.01); C10J 2300/1659 (2013.01); C10J 2300/1662 (2013.01); C10J 2300/1668 (2013.01); C10J 2300/1807 (2013.01); C10J 2300/1892 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for converting a feedstock comprising solid hydrocarbons to a sweet hydrogen enriched synthesis gas, involving the steps
a. gasifying said feedstock in the presence of steam, an oxygen rich gas and an amount of sour process gas to form a raw synthesis gas,
b. optionally conditioning said raw synthesis gas and providing said optionally conditioned raw synthesis gas as a sour shift feed gas,
c. contacting said sour shift feed gas with a sulfided material catalytically active in the water gas shift process for converting the sour shift feed gas to a sour hydrogen enriched synthesis gas,
d. separating H2S and CO2 from said sour hydrogen enriched synthesis gas, such that the sour hydrogen enriched synthesis gas is separated into two gases of different composition:
i. said sour process gas comprising the separated H2S and CO2; and
ii. the sweet hydrogen enriched synthesis gas,
wherein the concentration of sulfur in a combination of said feedstock, said steam, and said oxygen rich gas is less than the concentration of sulfur in the raw synthesis gas.