Research on a Dual Solvent To Separate Olefin/Aromatic–Sulfide from Heavy Fluid Catalytic Cracking Naphtha,Energy & Fuels

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Research on a Dual Solvent To Separate Olefin/Aromatic–Sulfide from Heavy Fluid Catalytic Cracking Naphtha
Energy & Fuels ( IF 5.2 ) Pub Date : 2018-01-29 00:00:00 , DOI: 10.1021/acs.energyfuels.8b00026
Yuhao Zhang ₁ , Yongtao Wang ₁ , Feng Chen ₁ , Suxin Liu ₁ , Liang Zhao ₁ , Jinsen Gao ₁ , Tianzhen Hao ₂ , Chunming Xu ₁

Affiliation

The separation of olefin from heavy fluid catalytic cracking (FCC) naphtha is beneficial to avoid the loss of octane number during the desulfurization process. Extractive distillation is a promising alternative to separate olefin and enrich sulfide at the same time. The vapor–liquid equilibrium of heavy FCC naphtha with different single solvents was studied first. Sulfolane showed the best ability to separate olefin with a selectivity coefficient θ of 2.81; however, sulfide selectivity coefficient β was only 1.78. N-Methylpyrrolidone showed the best ability to concentrate sulfide, with β up to 2.07 but lower θ of 2.74. The optimized dual solvent with a volume ratio of sulfolane/N-methylpyrrolidone at 85:15 (vol %) resulted in a selectivity coefficient θ of up to 4.01, while β was 1.97.

中文翻译：

重油催化裂化石脑油中分离烯烃/芳族硫化物的双溶剂研究

从重流催化裂化（FCC）石脑油中分离烯烃有利于避免脱硫过程中辛烷值的损失。萃取蒸馏是一种同时分离烯烃和富集硫化物的有前途的替代方法。首先研究了使用不同单一溶剂的重质催化裂化石脑油的气液平衡。环丁砜显示出最佳的分离烯烃的能力，其选择性系数为2.81。但是，硫化物选择性系数β仅为1.78。N-甲基吡咯烷酮显示出最佳的硫化物浓缩能力，β最高为2.07，但θ较低，为2.74。优化的双溶剂，环丁砜/ N的体积比在85:15（体积％）的-甲基吡咯烷酮导致选择性系数θ高达4.01，而β为1.97。

更新日期：2018-01-29

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