Effect of surfactant on the induction time of gas hydrate formation

Accelerating hydrate formation is the key of applications of hydrate technique in the fields of prevention of coal and gas outburst and storage and transport of coalbed methane, so it is necessary to do research on the acceleration of surfactant in the process of gas hydrate formation. Using hydrate equipment, gas hydrate formation processes in five groups of surfactants solution systems (T40, 1.0x10(-3) mol center dot L-1; T40/T80, 1.0X10(-3) mol center dot L-1; SDS, 1.0x10(-3) mol center dot L-1) were studied. The generalized induction time was measured by means of the direct observation method and the experimental data were calculated and analyzed based on the calculation model of induction time of gas hydrate. The results showed that the addition of surfactants decreases the surface tension of solution, which facilitates the gas dissolution, quickens the crystal nucleus formation, shortens the induction time, and the differences of effects of various surfactants on the induction time of gas hydrate formation are obvious.