石油与天然气化工2025，Vol.54Issue(2)：9-15,7.DOI:10.3969/j.issn.1007-3426.2025.02.002
基于铜基配位的新型氧化还原脱硫溶剂开发
Development of a new oxidation-reduction desulfurization solvent based on copper-based coordination
摘要
Abstract
Objective The aim is to improve the situation of poor stability,low sulfur capacity and easy blockage of equipment in the traditional liquid phase oxidative-reduction desulfurizer for the Lo-cat liquid phase oxidative-redution desulfurization process suitable for medium and small-scale sulfur-containing wellhead gas desulfurization,and to further develop a greener and more efficient wet oxidation desulfurizer system.Method A green and efficient copper-based wet oxidative-reduction desulfurization agent was prepared by adding copper chloride and chelating agent with a mixture of N,N-Dimethylformamide(DMF)and water as solvent.The structure and thermal stability of the desulfurization agent were determined,and desulfurization experiments were carried out in order to test the effects of different kinds of chelating agents,the ratio of copper ions and chelating agent,temperature,water content,and gas flow rate of H2S on the desulfurization performance.At the same time,the change rule of redox potential and pH during the absorption and regeneration process and the repeated desulfurization performance of desulfurization agents were investigated.Result The developed desulfurizer could work stably below 60℃,and the optimal desulfurization temperature was 40℃.In the desulfurization solution composed of 30 mL DMF+10 mL water,the desulfurizer composed of 2 g CuCl2 and 2 g amine chelating agent had a relatively high desulfurization effect,and the sulfur capacity was up to 14.83 g/L.Conclusion The developed desulfurizer has a high sulfur capacity while efficiently absorbing H2S,which can provide a reference for the natural gas desulfurization process.关键词
天然气/脱硫/DMF/氯化铜/螯合剂/液相氧化还原/铜基配位Key words
natural gas/desulfurization/DMF/copper chloride/chelating agent/liquid phase oxidative-reduction/copper-based coordination引用本文复制引用
王南伟,王雪凝,刘东,戴攀,薛靖文,陈鸿元,陈焰洪,邱奎..基于铜基配位的新型氧化还原脱硫溶剂开发[J].石油与天然气化工,2025,54(2):9-15,7.基金项目
国家科技重大专项"高含硫气藏安全高效开发技术"(2016ZX05017) （2016ZX05017）
中石化集团公司2020年科技项目"有机硫催化水解技术提升元坝气田商品气质量研究"(120049-1) （120049-1）
