Separation of hydrogen-lean mixtures for a high-purity hydrogen by vacuum swing adsorption
High-purity hydrogen is commercially produced by pressure swing adsorption from hydrogen-rich mixtures. In this work, a vacuum pressure swing adsorption cycle is used to produce high purity hydrogen from a hydrogen-lean binary mixture (20/80 H/sub 2//CO) using zeolite 5A as the sorbent. The effects of different process variables on separation performance have been studied. The purity of hydrogen product increases at low throughput, high feed pressure, high end pressure of cocurrent depressurization, low end pressure of countercurrent evacuation, and short cycle time. Also, it was found that for a H/sub 2/-lean mixture, the separation is improved at higher ambient temperature. In addition, a new vacuum purge step was found to improve the separation and is therefore a promising step for commercial application.
- Research Organization:
- State Univ. of New York, Buffalo (USA)
- OSTI ID:
- 7160361
- Journal Information:
- Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 23:1-3; ISSN SSTED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105* -- Separation Procedures
ADSORBENTS
ADSORPTION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
DATA
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PRESSURE DEPENDENCE
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
ZEOLITES