Cuprous-chloride-modified nanoporous alumina membranes for ethylene- ethane separation

Jerry Lin, W. Ji, Y. Wang, R. J. Higgins

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This paper reports an attempt to synthesize a CuCl-modified γ-alumina membrane for separation of ethylene from ethane. CuCl was effectively coated in the 4 nm pore γ-alumina top layers of disk-shaped and tubular alumina membranes by the reservoir method. Permeation of a single gas and binary mixture of ethylene and ethane was measured to characterize separation properties of the modified membranes. Pure ethylene permeance of the CuCl- modified membrane is 10-40% lower than that predicted from the pure ethane permeance by the Knudsen theory. This result is explained by a model based on the adsorbed layer of ethylene via π-complexation. Such an adsorbed layer hinders the diffusion of ethylene in the nanopores of CuCl-modified γ- alumina. Multiple gas permeation measurements on the CuCl-modified membranes show a separation factor for ethylene over ethane larger than the Knudsen value. This confirms a positive contribution of the surface flow of ethylene to the permeance of ethylene in the multiple gas permeation system. A maximum separation factor for ethylene over ethane of 1.4 is obtained for the CuCl- modified membrane at 60 °C.

Original languageEnglish (US)
Pages (from-to)2292-2298
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume38
Issue number6
StatePublished - 1999
Externally publishedYes

Fingerprint

Ethane
Aluminum Oxide
ethane
aluminum oxide
ethylene
Ethylene
Alumina
chloride
membrane
Membranes
Permeation
Gases
gas
cuprous chloride
Nanopores
Binary mixtures
Complexation
complexation
Gas mixtures

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

Cuprous-chloride-modified nanoporous alumina membranes for ethylene- ethane separation. / Lin, Jerry; Ji, W.; Wang, Y.; Higgins, R. J.

In: Industrial and Engineering Chemistry Research, Vol. 38, No. 6, 1999, p. 2292-2298.

Research output: Contribution to journalArticle

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AB - This paper reports an attempt to synthesize a CuCl-modified γ-alumina membrane for separation of ethylene from ethane. CuCl was effectively coated in the 4 nm pore γ-alumina top layers of disk-shaped and tubular alumina membranes by the reservoir method. Permeation of a single gas and binary mixture of ethylene and ethane was measured to characterize separation properties of the modified membranes. Pure ethylene permeance of the CuCl- modified membrane is 10-40% lower than that predicted from the pure ethane permeance by the Knudsen theory. This result is explained by a model based on the adsorbed layer of ethylene via π-complexation. Such an adsorbed layer hinders the diffusion of ethylene in the nanopores of CuCl-modified γ- alumina. Multiple gas permeation measurements on the CuCl-modified membranes show a separation factor for ethylene over ethane larger than the Knudsen value. This confirms a positive contribution of the surface flow of ethylene to the permeance of ethylene in the multiple gas permeation system. A maximum separation factor for ethylene over ethane of 1.4 is obtained for the CuCl- modified membrane at 60 °C.

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