Selective adsorption process
In pressure swing adsorption processing including higher pressure adsorption, cocurrent depressurization to intermediate pressure, countercurrent depressurization and/or lower pressure purge and repressurization, a cocurrent purge step is employed at adsorption pressure prior to cocurrent depressurization. Methane or natural gas is advantageously employed as the cocurrent purge gas. The cocurrent purge step reduces the storage of product gas, such as hydrogen, in the bed, enhances product recovery and correspondingly reduces the amount of desired product gas discharged with the waste gas discharged the countercurrent depressurization and/or purge steps used for bed regeneration. The value of the waste gas as a fuel is likewise enhanced by the presence of said methane or natural gas therein.
- Assignee:
- Union Carbide Corporation
- Patent Number(s):
- US 4475929
- OSTI ID:
- 6137664
- Resource Relation:
- Patent File Date: Filed date 14 Jan 1983; Other Information: PAT-APPL-457916
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pressure swing adsorption with intermediate product recovery
Optimal synthesis of a pressure swing adsorption process for CO2 capture
Related Subjects
SYNTHESIS GAS
PRODUCTION
PURIFICATION
ADSORPTION
AMMONIA
DEPRESSURIZATION
FLUIDIZED BED
HYDROGEN
IMPURITIES
METHANE
NATURAL GAS
PRESSURE DEPENDENCE
SEPARATION PROCESSES
SYNTHESIS
ALKANES
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC COMPOUNDS
SORPTION
030400* - Natural Gas- Products & By-Products