Surfactant effects on hydrate formation in unstirred gas/liquid systems

摘要

We report an experimental study on the effects of surfactant additives-sodium dodecyl sulfate, sodium tetradecyl sulfate, and sodium hexadecyl sulfate-on the hydrate formation from methane or HFC-32 supplied onto a quiescent aqueous pool. The rate of hydrate formation was observed to be promoted by 30-300 times by the addition of the above surfactants. With an increase in the surfactant concentration in the aqueous phase, the rate of hydrate formation first showed a sharp increase and then leveled off. As for the water-to-hydrate conversion ratio, nearly the same level, 80-88%, was obtained by use of any of the three surfactants.