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The low temperature removal of small quantities of nitrogen or methane from hydrogen gas by physical adsorption on a synthetic zeolite
Author(s) -
Kidnay Arthur J.,
Hiza Michael J.
Publication year - 1966
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690120113
Subject(s) - methane , adsorption , zeolite , chemistry , hydrogen , nitrogen , thermodynamics , inorganic chemistry , organic chemistry , catalysis , physics
A flow system was used to measure the physical adsorption isotherms of two mixtures of nitrogen and hydrogen and two mixtures of methane and hydrogen on a synthetic zeolite. The measurements were made at liquid nitrogen temperature and at pressures of 4 to 85 atm. Static systems were used to measure the pure component isotherms of nitrogen, methane, and hydrogen at the same temperature and over the appropriate pressure ranges. Although many different methods have been proposed for using pure component adsorption isotherms to predict the mixture isotherm, the only method giving quantitative agreement with the data of this study is the empirical “adsorption enhancement factor” ( 4 ). In addition to the adsorption isotherms, the concentration‐time or breakthrough curves of the mixtures were measured at flow rates ranging from 40 to 300 lb./(hr.)(sq.ft.). The method proposed by Eagleton and Bliss ( 18 ) was used to correlate these curves.