Characterization of inhibition mechanisms of kinetic hydrate inhibitors using ultrasonic test technique

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Abstract

The inhibition characteristics of kinetic hydrate inhibitors were experimentally investigated by utilization of the ultrasonic testing technique. PVCap (poly(vinylcaprolactam)) and VP/BA (vinyl pyrrolidone/butyl acrylate) were chosen as two typical kinetic inhibitors. Results of the tests demonstrate two kinds of inhibition mechanisms of kinetic hydrate inhibitors, i.e., nucleation inhibition and growth inhibition. PVCap polymer is strong to retard catastrophic growth of hydrate formation, while VP/BA dominantly prevents hydrate nucleation. The synergism of glycol ether compounds on the performance of PVCap was also tested. It was found that glycol ether compounds noticeably prolong the nucleation time, and extend the delay of catastrophic growth significantly. © 2010 Elsevier Ltd.

Original languageEnglish
Pages (from-to)278-283
Number of pages6
JournalChemical Engineering Science
Volume66
Issue number3
DOIs
Publication statusPublished - 1 Feb 2011

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Hydrates
Ultrasonics
Pyrrolidinones
Kinetics
Glycols
Nucleation
Ether
Ultrasonic testing
n-butyl acrylate

Keywords

  • Adsorption
  • Gas hydrates
  • Nucleation
  • Polymers
  • Synergism
  • Ultrasonic test technique

Cite this

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title = "Characterization of inhibition mechanisms of kinetic hydrate inhibitors using ultrasonic test technique",
abstract = "The inhibition characteristics of kinetic hydrate inhibitors were experimentally investigated by utilization of the ultrasonic testing technique. PVCap (poly(vinylcaprolactam)) and VP/BA (vinyl pyrrolidone/butyl acrylate) were chosen as two typical kinetic inhibitors. Results of the tests demonstrate two kinds of inhibition mechanisms of kinetic hydrate inhibitors, i.e., nucleation inhibition and growth inhibition. PVCap polymer is strong to retard catastrophic growth of hydrate formation, while VP/BA dominantly prevents hydrate nucleation. The synergism of glycol ether compounds on the performance of PVCap was also tested. It was found that glycol ether compounds noticeably prolong the nucleation time, and extend the delay of catastrophic growth significantly. {\circledC} 2010 Elsevier Ltd.",
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AU - Tohidi, Bahman

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AB - The inhibition characteristics of kinetic hydrate inhibitors were experimentally investigated by utilization of the ultrasonic testing technique. PVCap (poly(vinylcaprolactam)) and VP/BA (vinyl pyrrolidone/butyl acrylate) were chosen as two typical kinetic inhibitors. Results of the tests demonstrate two kinds of inhibition mechanisms of kinetic hydrate inhibitors, i.e., nucleation inhibition and growth inhibition. PVCap polymer is strong to retard catastrophic growth of hydrate formation, while VP/BA dominantly prevents hydrate nucleation. The synergism of glycol ether compounds on the performance of PVCap was also tested. It was found that glycol ether compounds noticeably prolong the nucleation time, and extend the delay of catastrophic growth significantly. © 2010 Elsevier Ltd.

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KW - Gas hydrates

KW - Nucleation

KW - Polymers

KW - Synergism

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