465792 Enhanced Kinetic Inhibition of Gas Hydrate Formation Using the Mixture of Poly(N-vinylcaprolactam) and Ionic Liquids

Tuesday, November 15, 2016: 4:09 PM
Yosemite C (Hilton San Francisco Union Square)
Seong-Pil Kang, Korea Institute of Energy Research, Daejeon, South Korea, Ki-Sub Kim, Department of Chemical and Biological Engineering, Korea National University of Transportation, Chungju, South Korea and Wonhee Lee, Climate Change Research Division, Korea Institute of Energy Research, Daejeon, South Korea

To investigate the synergetic effect by the mixture of ionic liquids (ILs), consisting of various cations and tetrafluoroborate anion, and well-know polymeric inhibitor, poly(N-vinylcaprolactam, PVCap) tests of kinetic inhibition on natural gas hydrate formation were performed. Results shows that the PVCap-IL mixtures revealed significantly enhanced kinetic hydrate inhibition performance. In particular, the mixture of PVCap and 1-hexyl-1-methylpyrrolidinium tetrafluroborate (HMP-BF4) showed the best hydrate inhibition performance even at higher pressure condition. It exhibited the highest hydrate nucleation inhibiting performance when it was at individual used, additional study was conducted using the mixtures of the two at various concentration combinations. The combination of 1:0.5 via weight basis between PVCap and HMP-BF4 showed the longest induction time. It is presumed that the enhanced synergetic effect of the ILs on the natural gas hydrate inhibition may arise from the prevention of the small cage formation by the ILs, which induces the inhibition of metastable structure I hydrate formation.

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See more of this Session: Gas Hydrates Science and Engineering II
See more of this Group/Topical: Engineering Sciences and Fundamentals