The emissions of volatile organic compounds (VOCs) from onshore and offshore facilities are studied and an alternative technology for the recovery of methane and propane by the use of membrane technology is explored. Permeation tests were carried out with a zeolite membrane consisting of an α - Al2O3 support. The permeance of nitrogen, carbon dioxide, helium, methane and propane through the membrane at varying pressures was determined. The permeance of CH4 was in the range of 1.44 x 10-6 to 3.41 x 10 -6 mols-1m-2Pa-1 and a CH4/C3H8 selectivity of 3.3 at 293 K was obtained. The molar flux of the gases was found to have an average linear regression coefficient value R2 of 0.9892. On the basis of the results obtained it can be concluded that separation of the hydrocarbon gases can be achieved with the zeolite membrane. The main mechanism governing the flow of gases through the zeolite membrane was molecular sieving although there is evidence of deviation from this mechanism. To achieve higher selectivity of the target gas there is need for further modification of the membrane. The morphology of the membrane was determined using the scanning electron microscope, which showed the pore size of the membrane and the support layer.
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机译：探讨了陆上和近海设施的挥发性有机化合物（VOC）的排放，并探讨了通过使用膜技术来恢复甲烷和丙烷的替代技术。用由α - Al2O3载体组成的沸石膜进行渗透试验。确定氮气，二氧化碳，氦气，甲烷和通过膜以不同压力下的渗透性的渗透性。 CH4的渗透率为1.44×10-6至3.41×10 -6摩尔-1M-2Pa-1，得到3.3的CH 4 / C 3 H 4在293k下选择。发现气体的摩尔通量具有0.9892的平均线性回归系数值R2。基于所得结果，可以得出结论，可以通过沸石膜实现烃气体的分离。通过沸石膜的气体流动的主要机理是分子筛，尽管存在偏离该机制的证据。为了实现更高的目标气体选择性，需要进一步改变膜。使用扫描电子显微镜测定膜的形态，其显示膜的孔径和支撑层。
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