Simultaneous Hydrate and Corrosion Inhibition with
Modified Poly(vinyl caprolactam) Polymers
Posted on 2017-06-19 - 20:45
Corrosion and unwanted gas hydrate
formation in subsea flowlines
are two of the major issues that the global gas industry faces when
transporting natural gas. Gas hydrates can cause severe blockages
due to the formation of hydrate plugs that block the flow. Corrosion
issues lead to significant economic loss in terms of prevention and
repair. To manage these issues, hydrate and corrosion inhibitors are
injected separately to subsea flowlines. However, there are often
compatibility issues that negatively impact their performance as a
result of surface and molecular interactions. The aim of this study
is to tackle this compatibility problem by developing single polymer
molecules that simultaneously prevent hydrate formation and inhibit
corrosion. The resulting materials are termed as kinetic hydrate and
corrosion inhibitors (KHCIs). The molecules are designed and assembled
using key structural motifs that are known kinetic hydrate inhibitors
(KHIs) and corrosion inhibitors. Specifically a KHI base polymer is
modified with corrosion groups using a series of highly efficient
chemical reactions. This method generates controlled libraries of
inhibitors with the same molecular weight (Mw), Mw distribution, end
groups, and composition along the chain. This control allows for accurate
interpretation of the effect of the structural group on the hydrate
and corrosion inhibition. This is a proof-of-concept study that can
be expanded with further performance testing and modifications of
polymer structure.
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Sheng, Qi; Silveira, Kelly Cristine
da; Tian, Wendy; Fong, Celesta; Maeda, Nobuo; Gubner, Rolf; et al. (2017). Simultaneous Hydrate and Corrosion Inhibition with
Modified Poly(vinyl caprolactam) Polymers. ACS Publications. Collection. https://doi.org/10.1021/acs.energyfuels.7b00525
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AUTHORS (7)
QS
Qi Sheng
KS
Kelly Cristine
da Silveira
WT
Wendy Tian
CF
Celesta Fong
NM
Nobuo Maeda
RG
Rolf Gubner
CW
Colin D. Wood