Phase equilibria and methane enrichment of clathrate hydrates of mine ventilation air + tetrabutylphosphonium bromide

Du, Jianwei, Li, Huijuan and Wang, Liguang (2014) Phase equilibria and methane enrichment of clathrate hydrates of mine ventilation air + tetrabutylphosphonium bromide. Industrial and Engineering Chemistry Research, 53 19: 8182-8187. doi:10.1021/ie5000664

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
lwang2_iecr.pdf Full text (Open Access) application/pdf 419.41KB 107

Author Du, Jianwei
Li, Huijuan
Wang, Liguang
Title Phase equilibria and methane enrichment of clathrate hydrates of mine ventilation air + tetrabutylphosphonium bromide
Journal name Industrial and Engineering Chemistry Research   Check publisher's open access policy
ISSN 0888-5885
1520-5045
Publication date 2014
Sub-type Article (original research)
DOI 10.1021/ie5000664
Open Access Status File (Author Post-print)
Volume 53
Issue 19
Start page 8182
End page 8187
Total pages 6
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2015
Language eng
Formatted abstract
This paper reports the experimentally measured phase equilibrium conditions for the clathrate hydrates formed from simulated mine ventilation air (0.50 vol % CH4 + 99.50 vol % air) in the presence of 0, 5, 20, 37.1, and 50 wt % of tetrabutylphosphonium bromide (TBPB). These equilibrium conditions were measured at the temperature range of 281.62–292.49 K and pressure range of 1.92–18.55 MPa by using an isochoric equilibrium step-heating pressure search method. The results showed that addition of TBPB allowed the hydrate dissociation condition for mine ventilation air to become milder, and at a given temperature, the lowest hydrate dissociation pressure was achieved at 37.1 wt % TBPB, corresponding to the stoichiometric composition for TBPB·32H2O. For each TBPB concentration tested, the semilogarithmic plots of hydrate dissociation pressure versus reciprocal absolute temperature can be satisfactorily fitted to two straight lines intersecting at 6.5 MPa. The slopes of these fitted straight lines are indifferent to changes in TBPB concentration. Gas composition analysis by gas chromatography also found that in the presence of 37.1 wt % TBPB, CH4 could be enriched approximately 3.5-fold in the hydrate phase.
Keyword Ventilation air
Gas hydrate
Gas separation
Methane hydrate
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 4 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 5 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 28 Apr 2014, 21:40:19 EST by Dr Liguang Wang on behalf of School of Chemical Engineering