International Conference on Gas Hydrates (ICGH) (6th : 2008)

A NEW METHOD FOR THE STATISTICAL EVALUATION OF NATURAL GAS HYDRATE NUCLEATION AT ELEVATED PRESSURE Kozielski, K.A.; Becker, N.C.; Hartley, P.G.; Wilson, P.W.; Haymet, A.D.J.; Gudimetla, R.; Ballard, A.L.; Kini, R.

Abstract

Nucleation is a stochastic process, most accurately represented by a probability distribution. Obtaining sufficient data to define this probability distribution is a laborious process. Here, we describe a novel instrument capable of the automated determination of hydrate nucleation probability under non-equilibrium conditions for a range of natural gas mixtures at pressures up to 10MPa. The instrument is based on the automated lag time apparatus (ALTA) which was developed to study the stochastic nature of nucleation in ambient pressure systems [1].We demonstrate that the probability distribution represents a robust and reproducible tool for the quantitative evaluation of hydrate formation risk under pseudo-realistic pressure conditions.

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