# US 8,784,760 B2 · Process for recovering CO2 from regeneration flue gas coming from a catalytic cracking unit

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- Number: US 8,784,760 B2
- Document ID: US8784760B2
- Status: Granted
- Kind: B2
- Application number: 13/139,877
- Filed: 2009-11-26
- Published: 2012-01-19
- Granted: 2014-07-22
- Earliest claimed: 2008-12-16
- Assignees: Ifp Energies Nouvelles
- Applicants: Frederic Feugnet; Romina Digne; Pierre-Antoine Bouillon; Eric Lemaire
- Inventors: Frederic Feugnet; Romina Digne; Pierre-Antoine Bouillon; Eric Lemaire
- Web page: https://patentgrep.com/patent/US8784760B2

## CPC

- B01D 53/1425: {Regeneration of liquid absorbents}
- B01D 53/1475: {Removing carbon dioxide}
- C10G 11/182: {Regeneration}
- B01D 2257/504: Carbon dioxide
- C10G 2300/107: Atmospheric residues having a boiling point of at least about 538 °C
- C10G 2300/1074: Vacuum distillates
- C10G 2300/4043: Limiting CO2 emissions
- Y02C 20/40: of CO2
- Y02P 30/40: Ethylene production
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The invention describes an integrated process for capturing CO2 emitted by at least a portion of the flue gas coming from the regeneration zone of a catalytic cracking unit using a unit for amine treatment of said flue gas, in which the catalytic cracking unit is equipped with an external exchanger using as the hot fluid a portion of the catalyst removed from the regeneration zone, the heat necessary for the amine treatment unit being supplied integrally by the catalytic cracking unit using the steam generated by said external exchanger.

## Claims

### Claim 1

An integrated process for capturing CO2 emitted by at least a portion of the flue gas coming from the regeneration zone of a catalytic cracking unit (FCC) treating a vacuum distillate or atmospheric residue hydrocarbon cut with a Conradson carbon residue (CCR) in the range 6 to 10, under high severity conditions with a C/O ratio of 5 to 10, and with a riser outlet temperature of 520° C. to 570° C., said process comprising treating said flue gas with amine in an amine treatment unit, wherein the amine is MEA (monoethanolamine), DEA (diethanolamine), or MDEA (dimethylethanolamine), wherein the catalytic cracking unit is equipped with an external exchanger employing a hot fluid, and wherein the hot fluid comprises a portion of the catalyst removed from the regeneration zone, and wherein the heat for the amine treatment unit is supplied integrally by the catalytic cracking unit by steam generated by said external exchanger.

### Claim 2 (depends on 1)

An integrated process for capturing CO2 emitted by the flue gas coming from a FCC unit according to claim 1, in which the proportion of flue gas coming from regeneration in the catalytic cracking unit which is treated by the amine treatment unit is more than 50% by weight.

### Claim 3 (depends on 1)

An integrated process for capturing CO2 emitted by the flue gas coming from a FCC unit according to claim 1, in which the amine is MEA (monoethanolamine).

### Claim 4 (depends on 1)

An integrated process for capturing CO2 emitted by the flue gas coming from a FCC unit according to claim 1, in which the amine treatment unit comprises tetramethylhexane-1,6-diamine.

### Claim 5 (depends on 1)

An integrated process for capturing CO2 emitted by the flue gas coming from a FCC unit according to claim 1, in which the steam generated in the external exchanger associated with the FCC unit is a low pressure steam of less than 8 bars with a temperature of less than 160° C.

### Claim 6 (depends on 1)

An integrated process for capturing CO2 emitted by the flue gas coming from a FCC unit according to claim 1, in which the flue gas sent to the amine treatment unit comes from a first stage of the regeneration zone of the catalytic cracking unit.

### Claim 7 (depends on 1)

An integrated process for capturing CO2 emitted by the flue gas coming from a FCC unit according to claim 1, wherein the regeneration zone contains a second stage, and in which process the flue gas sent to the amine treatment unit comes from the second stage of the regeneration zone of the catalytic cracking unit.