US 11,883,778 B2
Carbon dioxide and hydrogen sulfide recovery system using a combination of membranes and low temperature cryogenic separation processes
Ankur D. Jariwala, Katy, TX (US)
Assigned to CAMERON INTERNATIONAL CORPORATION, Houston, TX (US)
Appl. No. 16/476,579
Filed by Cameron Solutions, Inc., Houston, TX (US)
PCT Filed Jan. 9, 2018, PCT No. PCT/US2018/012856
§ 371(c)(1), (2) Date Jul. 9, 2019,
PCT Pub. No. WO2018/132339, PCT Pub. Date Jul. 19, 2018.
Claims priority of provisional application 62/444,443, filed on Jan. 10, 2017.
Prior Publication US 2019/0358583 A1, Nov. 28, 2019
Int. Cl. F25J 3/00 (2006.01); B01D 53/22 (2006.01); C01B 32/50 (2017.01); C01B 17/16 (2006.01); C10G 70/04 (2006.01); C10L 3/10 (2006.01); F25J 3/06 (2006.01); F25J 3/02 (2006.01)
CPC B01D 53/229 (2013.01) [C01B 17/167 (2013.01); C01B 32/50 (2017.08); C10G 70/045 (2013.01); C10L 3/103 (2013.01); C10L 3/104 (2013.01); F25J 3/0266 (2013.01); F25J 3/067 (2013.01); B01D 2053/221 (2013.01); C10G 2300/207 (2013.01); C10L 2290/06 (2013.01); C10L 2290/46 (2013.01); C10L 2290/543 (2013.01); C10L 2290/548 (2013.01); F25J 2205/80 (2013.01); F25J 2215/80 (2013.01); F25J 2220/66 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An acid gas purification system, comprising:
a primary membrane system with a CO2- and H2S-enriched permeate stream effluent and a hydrocarbon stream effluent;
a first compressor arranged to receive the CO2- and H2S-enriched permeate stream and produce a compressed stream; and
a cryogenic separation system to receive the compressed stream,
the cryogenic separation system including a conditioner followed by a frozen CO2 fractionator, wherein the frozen CO2 fractionator comprises a stripping section, a rectification section, and a mid-section, wherein the mid-section comprises a side processor comprising an empty section configured to return a solid to the frozen CO2 fractionator, and wherein the side processor further comprises a condenser that produces a liquid level in the side processor, and
wherein the frozen CO2 fractionator produces a CO2 and H2S liquid stream and a hydrocarbon gas stream, and the hydrocarbon gas stream is compressed in a second compressor and blended with the hydrocarbon stream effluent of the primary membrane system.