TY - JOUR
T1 - Effect of kinetic hydrate inhibitor and liquid hydrocarbon on the heterogeneous segregation and deposition of gas hydrate particles
AU - Shin, Kyuchul
AU - Kim, Jakyung
AU - Seo, Yutaek
AU - Kang, Seong Pil
N1 - Publisher Copyright:
© 2014, Korean Institute of Chemical Engineers, Seoul, Korea.
PY - 2014/11/28
Y1 - 2014/11/28
N2 - Segregation and deposition of hydrate particles observed in flowloop experiments are required to be investigated more thoroughly to understand the hydrate plugging mechanism in offshore flowlines. We used natural gas as gas phase and selected three different systems as liquid phase, which are pure water only, kinetic hydrate inhibitor added aqueous solution, and water+decane mixture, respectively. Hydrate formation process including onset and growth was studied by measuring the pressure, temperature, and torque changes in high-pressure autoclave. The obtained results suggest that poly-vinyl caprolactam (PVCap) solution shows elongated growth period than pure water until distinct torque change is observed, which also indicates the suppressing effect of PVCap on the growth of hydrate crystals. However, the presence of decane as continuous liquid phase enhances the deposition of hydrate particles on the wall. The torque change with conversion to hydrate used in this study is found to be useful to classify the hydrate formation process into three different regions.
AB - Segregation and deposition of hydrate particles observed in flowloop experiments are required to be investigated more thoroughly to understand the hydrate plugging mechanism in offshore flowlines. We used natural gas as gas phase and selected three different systems as liquid phase, which are pure water only, kinetic hydrate inhibitor added aqueous solution, and water+decane mixture, respectively. Hydrate formation process including onset and growth was studied by measuring the pressure, temperature, and torque changes in high-pressure autoclave. The obtained results suggest that poly-vinyl caprolactam (PVCap) solution shows elongated growth period than pure water until distinct torque change is observed, which also indicates the suppressing effect of PVCap on the growth of hydrate crystals. However, the presence of decane as continuous liquid phase enhances the deposition of hydrate particles on the wall. The torque change with conversion to hydrate used in this study is found to be useful to classify the hydrate formation process into three different regions.
KW - Flow Assurance
KW - Gas Hydrates
KW - Kinetic Hydrate Inhibitor
KW - Offshore Gas Fields
KW - Particle Agglomeration
UR - http://www.scopus.com/inward/record.url?scp=84914698463&partnerID=8YFLogxK
U2 - 10.1007/s11814-014-0141-0
DO - 10.1007/s11814-014-0141-0
M3 - Article
AN - SCOPUS:84914698463
SN - 0256-1115
VL - 31
SP - 2177
EP - 2182
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
IS - 12
ER -