Evaluation of the performance of kinetic inhibitors for clathrate hydrate using unidirectional growth apparatus

Abstract

We study the formation of tetrahydrofuran (THF) clathrate hydrate from polyvinylpyrrolidone (PVP) aqueous solution as a function of growth rate V and adsorbed PVP concentration c using the unidirectional growth technique.

Kinetic inhibition effect of Type I and III antifreeze proteins on unidirectional tetrahydrofuran hydrate crystal growth

“…The present study employed the same experimental methods that we reported previously; 28 we summarised the setup as follows.…”

“…From measurements of Dx i (t) at steady state, we can calculate the supercooling due to the KHI additive (DT i ). 28 In our previous study, we calculated the temperatures at each position of the sample cell based on the temperature gradient, and the distance from each thermo-block. DT i was calculated using the simple formula in (1):…”

“…In a previous publication, we proposed a simple method for evaluating KHI performance with a unidirectional growth apparatus. 28 We measured the degree of supercooling while controlling the rate of crystal growth to evaluate the antifreeze performance of polyvinylpyrrolidone (PVP). This technique eliminates nucleation and solely evaluates growth inhibition effect.…”

Investigation into THF hydrate slurry flow behaviour and inhibition by an anti-agglomerant

“…6,7 Many studies focused on the changing trend of ow parameters (e.g., P, T, ow rate, pressure drop, hydrate particle size, inhibitor, hydrate formation induction, supercooling degree etc. [8][9][10][11][12] ), and other studies focused on the relationship between supercooling degree and kinetic inhibitor concentration, 13 but hydrate morphology evolvement and liquid stratication phenomena during the plugging process are less involved.…”

Confinement of hydrogen and hydroxyl radicals in water cages: a density functional theory study

“…Clathrate hydrates are crystalline solid compounds that exist widely in ocean sediments, permafrost regions, and comets and on certain planets. [1][2][3][4][5][6][7][8][9] Interest in clathrate hydrates arose due to of two aspects. First, their ability to store methane on a large scale, both underground and in the ocean, means that they might become a major source of energy in the future.…”