Kinetics of desorption of hexane from the microporous metal organic framework RPM-1

M. Smith, J. T. Culp, E. Bittner, B. Parker, Jing Li, B. Bockrath

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The kinetics of desorption of hexane from the microporous metal framework RPM-1 has been studied using a pulse mass analyzer. In this method a small sample of organic liquid was injected into a heated carrier gas that passes through a packed bed of adsorbent. The change in mass of the bed with time was observed following the adsorption of the pulse. RPM-1 is a microporous material of the general formula [M3(bpdc)3(bpy)] · 4DMF · H2O, where M is either Co or Zn, bpdc is biphenyl dicarboxylate and bpy is 4,4′-bipyridine. The pores are channels of larger supercages (11 × 11 × 5 Å) connected by smaller windows of approximately 8 Å diameter. The desorption of hexane was well represented by a combination of two first order processes. Activation energies determined for the two processes over a temperature range of 373-473 K were 56 and 63 kJ/mol for RPM-1 (Co). The two activation energies are similar to isosteric heats of adsorption measured independently in earlier work at corresponding coverages. Similar values were found for RPM-1 (Zn). The pulse mass analyzer was found to be an effective way to investigate the dynamics of adsorption processes.

Original languageEnglish
Pages (from-to)115-121
Number of pages7
JournalMicroporous and Mesoporous Materials
Volume106
Issue number1-3
DOIs
Publication statusPublished - Nov 1 2007

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Hexanes
Hexane
Desorption
Metals
desorption
Adsorption
Kinetics
adsorption
beds
analyzers
kinetics
Activation energy
pulses
metals
Microporous materials
activation energy
organic liquids
Packed beds
adsorbents
Adsorbents

Keywords

  • Desorption
  • Hexane
  • Kinetics
  • Metal organic framework
  • Pulse mass analyzer

ASJC Scopus subject areas

  • Catalysis
  • Materials Science(all)

Cite this

Kinetics of desorption of hexane from the microporous metal organic framework RPM-1. / Smith, M.; Culp, J. T.; Bittner, E.; Parker, B.; Li, Jing; Bockrath, B.

In: Microporous and Mesoporous Materials, Vol. 106, No. 1-3, 01.11.2007, p. 115-121.

Research output: Contribution to journalArticle

Smith, M. ; Culp, J. T. ; Bittner, E. ; Parker, B. ; Li, Jing ; Bockrath, B. / Kinetics of desorption of hexane from the microporous metal organic framework RPM-1. In: Microporous and Mesoporous Materials. 2007 ; Vol. 106, No. 1-3. pp. 115-121.
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