The performance of coalescing filter cartridges (of four different specifications) after a 410-day field operation for the high-pressure natural gas purification has been evaluated in this study. Our evaluation of field-tested filter cartridges showed the increase of the filter pressure drop by a factor of 5.28 and the decrease of the filtration efficiency at various degrees, resulting in 50.3% loss in the filter quality factor (on average). The above evidenced the performance degradation of coalescing filter cartridges after the field application. Through the basic property characterization of composite media in tested filter cartridges, it was found the observed performance degradation of tested coalescing filter cartridges was attributed to the increase in the pore size of the coalescing layer (0.4-30.4%), and the decrease of both pore size (2.3-23.7%) and thickness (3.3-28.7%) in the drainage layer. Via the performance evaluation of composite media composed of only coalescing and drainage layers used in both fresh and tested cartridges, it is concluded that the coalescing filter cartridges with composite media having both oleophobic coalescing and drainage layers, and high tensile and compression strengths, are excellent candidates for the stable and reliable operation of natural gas filtration at high pressure.

在这项研究中，已经评估了在410天现场操作后用于高压天然气净化的聚结滤芯（四种不同规格）的性能。我们对经过现场测试的滤芯的评估显示，过滤器压降增加了5.28倍，过滤效率在不同程度上降低了，导致过滤器品质因数损失（平均）为50.3％。以上证明了现场应用后聚结滤芯的性能下降。通过对测试滤芯中复合介质的基本特性进行表征，发现观察到的测试聚结滤芯的性能下降归因于聚结层孔径的增加（0.4-30.4％），而两者均降低孔径（2。排水层厚度为3-23.7％）和厚度（3.3-28.7％）。通过在新鲜滤芯和测试滤芯中仅使用聚结和排水层组成的复合介质的性能评估，可以得出结论，具有既具有疏油聚结和排水层又具有高拉伸和压缩强度的复合介质的聚结过滤器滤芯非常出色稳定，可靠的高压天然气过滤操作的最佳选择。