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Received March 3, 2014
Accepted May 14, 2014
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Effect of kinetic hydrate inhibitor and liquid hydrocarbon on the heterogeneous segregation and deposition of gas hydrate particles
Division of Ocean Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea 1Climate Change Research Division, Korea Institute of Energy Research (KIER), Daejeon 305-343, Korea
Korean Journal of Chemical Engineering, December 2014, 31(12), 2177-2182(6), 10.1007/s11814-014-0141-0
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Abstract
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_x000D_
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.
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References
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Sloan ED, Koh CA, Sum AK, Natural gas hydrates in flow assurance, Elsevier, Amsterdam (2010)
Moore JA, Ver Vers L, OTC 19869, Offshore technology conference, Houston, Texas, May 4-7 (2009)
Cha M, Shin K, Seo Y, Shin JY, Kang SP, J. Phys. Chem. A, 117(51), 13988 (2013)
May EF, Wu R, Kelland MA, Aman ZM, Kozielski KA, Hartley PG, Maeda N, Chem. Eng. Sci., 107, 1 (2014)
Daraboina N, Linga P, Chem. Eng. Sci., 93, 387 (2013)
Yang JH, Tohidi B, Chem. Eng. Sci., 66(3), 278 (2011)
Anderson BJ, Tester JW, Borghi GP, Trout BL, J. Am. Chem. Soc., 127(50), 17852 (2005)
Daraboina N, Linga P, Ripmeester J, Walker VK, Englezos P, Energy Fuels, 25(10), 4384 (2011)
Sum AK, Koh CA, Sloan ED, Energy Fuels, 26(7), 4046 (2012)
Aman ZM, Joshi SE, Sloan ED, Sum AK, Koh CA, J. Colloid Interface Sci., 376, 283 (2012)
Aspenes G, Dieker LE, Aman ZM, Hoiland S, Sum AK, Koh CA, Sloan ED, J. Colloid Interface Sci., 343(2), 529 (2010)
Greaves D, Boxall J, Mulligan J, Montesi A, Creek J, Sloan ED, Koh CA, Chem. Eng. Sci., 63(22), 5410 (2008)
Leba H, Cameirao A, Herri JM, Darbouret M, Peytavy JL, Glenat P, Chem. Eng. Sci., 65(3), 1185 (2010)
Sefidroodi H, Chua PC, Kelland MA, Chem. Eng. Sci., 66(10), 2050 (2011)
Kelland MA, Svartas TM, Andersen LD, J. Pet. Sci. Eng., 64, 1 (2009)
Hemmingsen PV, Li X, Kinnari K, Hydrate plugging potential in underinhibited systems, Proceedings of the 6th International Conference on Gas Hydrates, Vancouver, British Columbia, Canada, July 6-10 (2008)
Kelland MA, Energy Fuels, 20(3), 825 (2006)
Joshi S, Rao I, Zerpa L, Webb E, Lafond P, Sloan ED, Sum AK, Koh CA, Proceedings of the 7th International Conference on Gas Hydrates, Edinburgh, Scotland, UK, July 17-21 (2011)
Nicholas JW, Dieker LE, Sloan ED, Koh CA, J. Colloid Interface Sci., 331(2), 322 (2009)
Cha M, Shin K, Kim J, Chang D, Seo Y, Lee H, Kang SP, Chem. Eng. Sci., 99, 184 (2013)
Dieker LE, Aman ZA, George NC, Sum AK, Sloan ED, Koh CA, Energy Fuels, 23, 5966 (2009)
