天然气脱COS工艺技术进展评述
Review on Technical Progress of COS Removal Technology of Natural Gas
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- 引用格式:
-
陈赓良.天然气脱COS工艺技术进展评述[J].天然气与石油,2019,37(4):0.doi:
Chen Gengliang.Review on Technical Progress of COS Removal Technology of Natural Gas[J].Natural Gas and Oil,2019,37(4):0.doi:
- DOI:
- 作者:
- 陈赓良
Chen Gengliang
- 作者单位:
- 全国天然气标准化技术委员会秘书处
Secretariat of China Natural Gas Standardization Technology Committee
- 关键词:
- 商品天然气;总硫含量;COS水解;活化MDEA工艺;砜胺法工艺
Commercial gas; Total sulphur content; COS hydrolysis; Activated MDEA; Sulfinol process
- 摘要:
GB 17820-2018《天然气》将一类商品气总硫限值规定为20 mg/m3,这既给天然气净化厂脱硫工艺的升级改造带来了严峻挑战,也给气体净化工艺技术进步带来了难得的机遇。国内外的室内研究与工业实践均证明，虽然砜胺类溶剂的COS脱除率甚高，但由于溶剂价格昂贵、对烃类溶解度很高，同时溶剂的选吸功能有可能完全丧失，因而一般不应用于COS脱除。以CT 8-24为代表的活化MDEA溶剂的COS脱除率可以达到90%左右，且仍可保持约30%的选吸效率，适用于COS含量不超过50 mg/m3的场合。当原料气中COS含量很高时，宜考虑采用“1+1”COS脱除工艺。
In GB 17820-2018 "Natural Gas", the total sulfur limit of the primary commercial gas is specified as 20 mg/m3, which not only brings severe challenges to the upgrading and transformation of desulfurization process in natural gas purification plant, but also brings rare opportunities to the technological progress of gas purification process.Laboratory studies and industrial practices at home and abroad have proved that both activated MDEA and COS hydrolysis processes can make the total sulphur content of the primary commercial gas up to the standard.The former should be used when the total sulphur content is not more than 50 mg/m3, and the hydrolysis process or sulfinol process should be considered when the total sulphur content is above 50 mg/m3.
