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石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
LNG原料气深度脱硫脱碳技术研究
周永阳1.2.3黄黎明1-2.3何金龙1,2.3彭修军1.2,3
（1.中国石油西南油气田公司天然气研究院2.国家能源高含硫气藏开采研发中心）
(3.中国石油天然气集团公司高含硫气藏开采先导试验基地）
2014
摘要天然气在液化过程中需深冷至约一162℃，为了避免在低温液化过程中因结冰堵塞设备和管线，需对天然气中的酸性组分进行深度脱除。介绍了LNG工厂中原料天然气预处理工
艺中的重点单元一脱硫脱碳单元的技术路线，阐述了中国石油西南油气田公司天然气研究院自主研发的CT8-23活化MDEA溶剂及CT8-25深度脱硫脱碳脱有机硫溶剂的性能及技术特点，并与国外同类溶剂Sulfinol-D的性能进行了对比。结果表明，在吸收压力仅为2MPa、吸收塔塔板数为 13块的条件下，CT8-25溶剂对H:S、CO2均可达到深度脱除的要求，且对有机硫的脱除率高出 Sulfinol.D约28%。
关键词LNG脱硫脱碳脱有机硫CT8-23CT8-25
中图分类号：TE644
文献标志码：A
DOI:10.3969/i.issn.1007-3426.2014.03.003
Researsh on deep desulfurization and decarbonization technology of LNG feed gas
Zhou Yongyang-2.3,Huang Limingl2-3,He Jinlong'-2.,PengXiujun'-2.3
(l.Research Institute of Natural Gas Technology,PetroChina Southwest Oil & Gasfield Company
Chengdu610213, Sichuan, China; 2.National Energy R&D Center of High Sulfur Gas Exploitation,Chengdu6l0213,Sichuan,China; 3.High Sulfur Gas Exploitation Pilot Test
Center，CNPC，Chengdu610213，Sichuan，China)
Abstract: It is necessary to cool natural gas to about 162 C during the liquefaction process . In order to avoid freezing plugging of the equipment and pipelines during the cryogenic liquefac -tion process , the acidic components of natural gas should be removed deeply . The key process technology of feed gas pretreatment unit for LNG plant , which includes desulfurization and de-carbonization is mainly introduced . The characteristics and technical advantages of CT 8-23 activa-ted MDEA solvent and CT8-25 solvent , which can deeply remove the H:S, CO and organic sul. fur , are described. Both of the solvents have been developed independently by Research Institute of Natural Gas Technology , PetroChina Southwest Oil & Gasfield Company . Compared to simi-lar foreign solvents Sulfinol-D, the results show that CT8-25 solvent can removal H: S,CO2 deep-ly to reach the requirements . When the absorption pressure is 2 MPa, the plate number of ab. sorber is 13, and the removal rate of organic sulfur is 28% higher than Sulfinol-D.
Key words : LNG, desulfurization , decarbonization, organic sulfur removal , CT8-23, CT8-25
基金项目：中国石油天然气股份有限公司重大专项“天然气液化关键技术研究”专题一“天然气深度预处理工艺技术研究"(2009E—1901)。
作者简介：周永阳（1978一），女，四川资中人。工程师，四川大学应用化学专业毕业，硕士研究生，主要从事天然气脱硫技术及产品研发工作，已发表论文10余篇。地址：（610213）四川省成都市华阳天研路218号天然气研究院。电话：028-85604531。E-mail ;zhou_yy@ petrochina .com -cn