Kinetics of desorption of hexane from the microporous metal organic framework RPM-1
- National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
- Rutgers Univ., Piscataway, NJ (United States)
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.
- Research Organization:
- National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- OSTI ID:
- 925818
- Report Number(s):
- DOE/NETL-IR-2008-026; TRN: US200810%%42
- Journal Information:
- Microporous and Mesoporous Materials, Vol. 106, Issue 1-3; ISSN 1387-1811
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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