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H 2 separation using tubular stainless steel supported natural clinoptilolite membranes
Author(s) -
Farjoo Afrooz,
Kuznicki Steven M.
Publication year - 2016
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22589
Subject(s) - clinoptilolite , permeance , materials science , membrane , natural gas , permeation , hydrogen , porosity , coating , zeolite , chemical engineering , air separation , gas separation , metallurgy , analytical chemistry (journal) , composite material , chromatography , oxygen , chemistry , biochemistry , organic chemistry , engineering , catalysis
Disk membranes generated from high‐purity natural clinoptilolite mineral rock have shown promising hydrogen separation performance. To scale up production of these types of membranes for industrial gas separation, a coating strategy was devised. A mixture of natural clinoptilolite and aluminum silicate was deposited on the inner surface of porous stainless steel tubes by the slip casting technique. Phase composition and morphology of the coating materials were investigated using X‐ray diffraction. The performance was evaluated for a range of gases using single gas permeation tests at different temperatures and pressures. Introduction of the second layer significantly improved the performance of the membrane system. The experiments on the double‐layered membranes measured a hydrogen permeance of 1.65 × 10 −7 mol · m −2 · s −1 · Pa −1 at 300 °C. H 2 /CO 2 and H 2 /C 2 H 6 single gas selectivity was 10.2 and 8.45 respectively at 25 °C and feed pressure of 110 kPa. These results show that natural zeolite coated stainless steel tubular membranes have high potential for large‐scale gas separation at high temperature requirements.