The CCJ desulfurization and decarbonization composite solvent was prepared by joining a variety of active agent ,defoaming agent and corrosion inhibitor with certain proportion into 45%(mass fraction) MDEA solution .Taking H2 S ,CO2 and organic sulfur content in the purified gas as evaluation index ,the purification ability of CCJ composite solvent to high hydrogen sulfide natural gas and the foam resistance ability were studied on the pilot scale experiment .The results showed when the absorbent temperature is 50 ℃ ,the gas to liquid ratio is 500 m3/m3 ,the regeneration temperature is 108 ℃ ,the composite solvent had excellent purification capacity ;w hen the volume fraction in sour gas is 7 .12% of H2 S ,4 .57% of CO2 and mass concentration 413 .77 mg/m3 of organic sulfur ,and the absorbent pressure is 6 .0 MPa ,the purified gas could reach the standards with mass concentration of H2 S ≤ 6 mg/m3 , volume fraction of CO2 ≤ 0 .5% and mass concentration of organic sulfur ≤16 mg/m3 .Meanwhile ,the composite solvent exhibits an excellent foam resistance capacity .%以质量分数为45％的N‐甲基二乙醇胺（MDEA）水溶液为基础组分，根据天然气中酸气组成，按一定比例加入多种活性剂、消泡剂和缓蚀剂，配制成CCJ脱硫脱碳复合溶剂。采用天然气脱硫脱碳中试装置，以净化气中H2S、CO2、有机硫含量为评价指标，考察了CCJ复合溶剂对高含硫天然气的净化能力及溶剂的抗发泡性能。结果表明，当吸收温度为50℃、气液比为500 m3／m3、再生温度为108℃时，复合溶剂的净化能力最佳；在原料气中酸气组成为 H2 S 体积分数7．12％、CO2体积分数4．57％、有机硫质量浓度413．77 mg／m3、吸收压力6．0MPa的条件下，CCJ复合溶剂完全可以使净化气中H2 S质量浓度≤6 mg／m3、CO2体积分数≤0．5％、有机硫质量浓度≤16 mg／m3，且复合溶剂具有良好的抗发泡性能。
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