Title:
TWO STAGE PROCESS FOR PRODUCING PURIFIED GAS
Document Type and Number:
WIPO Patent Application WO/2010/006934
Kind Code:
A3
Abstract:
The present invention provides a process for producing purified gas from a feed gas stream comprising methane and gaseous contaminants, the process comprising the steps of : 1) providing the feed gas stream; 2) cooling the feed gas stream to a temperature at which at least part of the feed gas stream is present in the liquid phase; 3) separating the cooled feed gas stream by means of cryogenic distillation into a bottom stream rich in contaminants and lean in methane, and into a top stream rich in methane and lean in gaseous contaminants, in which the bottom stream contains between 0.5 and 15 % of the methane present in the feed gas stream; 4) cooling the stream rich in methane to a temperature at which solid and/or liquid phase contaminants are formed; 5) introducing the cooled stream of step 4) into a gas/liquid/solids separation vessel, and 6) removing from the gas/liquid/solids separation vessel the purified gas and a stream rich in contaminants.
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Inventors:
BEAUMONT ANDREW MALCOLM (NL)
GEERS HENRICUS ABRAHAM (NL)
GEERS HENRICUS ABRAHAM (NL)
Application Number:
PCT/EP2009/058400
Publication Date:
October 23, 2014
Filing Date:
July 03, 2009
Export Citation:
Assignee:
SHELL INT RESEARCH (NL)
BEAUMONT ANDREW MALCOLM (NL)
GEERS HENRICUS ABRAHAM (NL)
BEAUMONT ANDREW MALCOLM (NL)
GEERS HENRICUS ABRAHAM (NL)
International Classes:
F25J3/02; C10L3/10
Domestic Patent References:
| WO2008095258A1 | 2008-08-14 | |||
| WO2007030888A1 | 2007-03-22 |
Foreign References:
| US3306057A | 1967-02-28 |
Other References:
HAUT R C ET AL: "DEVELOPMENT AND APPLICATION OF THE CONTROLLED-FREEZE-ZONE PROCESS", SPE PRODUCTION ENGINEERING, THE SOCIETY, RICHARDSON, TX, GB, vol. 4, no. 3, 1 August 1989 (1989-08-01), pages 265 - 271, XP009044764, ISSN: 0885-9221
NORTHROP P S ET AL: "CRYOGENIC SOUR GAS PROCESS ATTRACTIVE FOR ACID GAS INJECTION APPLICATIONS", PROCEEDINGS GAS PROCESSORS ASSOCIATION. GPA MEETING/ANNUALCONVENTION, XX, XX, 14 March 2004 (2004-03-14), pages 1 - 08, XP001223962
THOMAS E R ET AL: "CONCEPTUAL STUDIES FOR CO2/NATURAL GAS SEPARATION USING THE CONTROLLED FREEZE ZONE (CFZ) PROCESS", GAS SEPARATION & PURIFICATION, GUILDFORD, SURREY, GB, vol. 2, 1 June 1988 (1988-06-01), pages 84 - 89, XP001223902, DOI: 10.1016/0950-4214(88)80017-3
NORTHROP P S ET AL: "CRYOGENIC SOUR GAS PROCESS ATTRACTIVE FOR ACID GAS INJECTION APPLICATIONS", PROCEEDINGS GAS PROCESSORS ASSOCIATION. GPA MEETING/ANNUALCONVENTION, XX, XX, 14 March 2004 (2004-03-14), pages 1 - 08, XP001223962
THOMAS E R ET AL: "CONCEPTUAL STUDIES FOR CO2/NATURAL GAS SEPARATION USING THE CONTROLLED FREEZE ZONE (CFZ) PROCESS", GAS SEPARATION & PURIFICATION, GUILDFORD, SURREY, GB, vol. 2, 1 June 1988 (1988-06-01), pages 84 - 89, XP001223902, DOI: 10.1016/0950-4214(88)80017-3
Attorney, Agent or Firm:
SHELL INTERNATIONAL B.V. et al. (Intellectual Property Services, CJ The Hague, NL)
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