Abstract: Using XDS solvent to remove organic sulfur compounds from high sour natural gas was investigated. Meanwhile, a comparison of the sulfur removal performance of XDS solvent and MDEA solvent was carried out and the sulfur removal mechanism of XDS solvent was discussed. Results showed that under the conditions of an operation pressure of 1.5Mpa, an absorption temperature of 40℃, a packing height of 600 mm and a gas to liquid ratio of 126, the contents of H2S and total sulfur in the treated gas of XDS solvent (both XDS-A and XDS-B) and MDEA solvent met the requirements of first class gas and second class gas, respectively. Furthermore, when using XDS-B solvent, even at a gas to liquid ratio of 169 the contents of H2S and total sulfur in the treated gas still met the first class gas requirements, which indicated that the sulfur removal performance of XDS solvent was better then that of MDEA solvent. As compared with XDS-B solvent, XDS-A solvent was more suitable for the deep purification under low gas to solvent ratio.

Key words: natural gas, organosulfur, desulfur solvent, absorption