Absorption Of Methane By Organic Surfactant Aggregates And Its Application

To solve the danger of mine gas, this paper used methane as a model of mine gas and studied the feasibility of decreasing methane concentration by absorbing methane using organic surfactant aggregates. The effects of single surfactant system and mixed surfactant system on methane absorption were studied. By comprehensive analysis of the absorptive effect and the stability of different absorbents, SDS-castor oil-water combination system was determined as good methane absorbent. Furthermore, the morphology and the microenvironment polarity of organic aggregate in SDS-castor oil-water system were characterized using laser light scattering, TEM, fluorescence spectrum, fluorescence life time and UV spectrum. Then the enhanced absorption mechanism of this absorbent was analyzed based on solution thermodynamics theory and micelle model proposed by Mukerjee. Moreover, the absorption kinetics of this system was studied by double-membrane model. Finally, the effect of this absorbent on methane absorption in atomization condition was studied in the laboratory and in air-return and the explosion surpression effect of this absorbent was studied by simulated explosion test. The result indicated that SDS-castor oil-water system had good effect on methane absorption and could inhibit methane explosion. The decrease of microenvironment polarity of organic aggregate in SDS-castor oil-water system and the decrease of Laplace pressure effect at aggregate-water interface enhanced the absorption of methane by this system.