摘要
开发了一种水合物法分离乙烯裂解气的新技术,考察了在选择性热力学抑制剂THF下乙烯裂解气体系的气-水合物相平衡。在一定范围内改变体系的初始压力、温度和THF浓度,得到了各组分在气-水合物两相的摩尔分率和体系达到平衡时的压力。结果表明,通过加入选择性抑制剂,能使甲烷生成水合物,进入水合相,乙烷、乙烯则很难生成水合物而得到抑制,从而使C2组分在气相中得到富集,甲烷在水合物相得到富集,实现乙烯裂解气的分离;在初始压力为4.0MPa、温度为276.15K、THF浓度为8.0l%(摩尔分数)的条件下,分离效果达到最佳。
A new separation technology for ethylene cracking gas through hydrates was developed, and the vaper-hydrate equilibria in ethylene cracking gas (H_2+CH_4+C_2)system with the presence of THF in water was studied. The equilibrium pressure of system and the mol fractions of all components in vapor and hydrate phases were gained at different initial pressures, temperatures and THF mol concentrations. The results demonstrated that methane could be enriched in the hydrate phase with the presence of THF, at the same time ethane and ethylene were enriched in the gas phase, and the best separation effect could be attained when the initial pressure was 4.0MPa,temperature was 276.15K and THF concentration was 8.01%(mol/mol).
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2006年第5期340-342,349,共4页
Chemical engineering of oil & gas
基金
国家自然科学基金资助项目(编号:20176028
90210020)
关键词
乙烯
裂解气
水合物
分离
相平衡
ethylene, cracking gas, hydrate, separation, phase equilibrium
