PURIFICATION OF CARBON DIOXIDE

Refrigeration duty in a carbon dioxide purification unit (CPU) operating at elevated pressure and sub-ambient temperature can be provided in at least a first part by indirect heat exchange against at least latent heat of at least one liquid first refrigerant, preferably carbon dioxide liquid(s) prod...

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Bibliographic Details
Main Author HIGGINBOTHAM, PAUL
Format Patent
LanguageEnglish
French
Published 04.05.2013
Subjects
BLASTING
CHEMISTRY
COMBINED HEATING AND REFRIGERATION SYSTEMS
COMPOUNDS THEREOF
HEAT PUMP SYSTEMS
HEATING
INORGANIC CHEMISTRY
LIGHTING
LIQUEFACTION SOLIDIFICATION OF GASES
LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS
MANUFACTURE OR STORAGE OF ICE
MECHANICAL ENGINEERING
METALLURGY
MIXTURES BY PRESSURE AND COLD TREATMENT
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
REFRIGERATION OR COOLING
SEPARATION
TRANSPORTING
WEAPONS
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Summary:Refrigeration duty in a carbon dioxide purification unit (CPU) operating at elevated pressure and sub-ambient temperature can be provided in at least a first part by indirect heat exchange against at least latent heat of at least one liquid first refrigerant, preferably carbon dioxide liquid(s) produced in the CPU, thereby typically evaporating the liquid(s), and a second part by indirect heat exchange with sensible heat energy alone of a second refrigerant. The second refrigerant may be nitrogen gas imported from an integrated cryogenic air separation unit (ASU) or carbon dioxide liquid exported from the CPU, cooled and returned to the CPU. One advantage is that total power consumption of the CPU and an integrated ASU is reduced.
Bibliography:Application Number: CA20122793610