Abstract
The main objective of the present work is to investigate experimentally the formation of simple gas hydrate with or without the presence of kinetic inhibitors such as modified starch in a recirculation flow loop. For this purpose, a laboratory recirculation flow mini-loop apparatus was set up to measure the induction time for hydrate formation and gas consumption rate when a hydrate forming substance (such as C1, C3, CO2 and i-C4) is contacted with water in the absence or presence of dissolved inhibitor under suitable temperature and pressure conditions. In each experiment, a water blend saturated with pure gas is circulated up to a required pressure. Pressure is maintained at a constant value during experimental runs by means of the required gas make-up. The effect of pressure on gas consumption during hydrate formation is investigated with or without the presence of polyvinylpyrrolidone (PVP) and modified starch as kinetic inhibitors at various concentrations. Our results show that the modified starch can be applied as an inhibitor in prevention of simple gas hydrate formation.
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