树脂改性对脱硫离子液中氟氯离子脱除性能的影响研究
收稿日期: 2025-01-03
网络出版日期: 2025-03-26
基金资助
甘肃省重点研发计划项目(23YFGA0051);甘肃省高等学校产业支撑计划项目(2024CYZC-17)
Study on effect of resin modification on removal performance of fluoride and chloride ions in desulfurization ionic liquid
Received date: 2025-01-03
Online published: 2025-03-26
脱硫离子液中氟氯离子不断积累致其脱硫效率下降、离子液损耗和设备腐蚀加剧。因此，脱硫离子液中F-和Cl-的有效去除具有重要的研究意义。首先，优选717、D730、D301等6种阴离子交换树脂，考察其对脱硫离子液中F-和Cl-的脱除效果。结果表明，717树脂有着最佳的F-和Cl-脱除性能，其平衡吸附量分别为0.020 mg/g和3.506 mg/g。其次，对717树脂分别进行氯型、氢氧根型和硫酸根型改性，考察不同改性方法对单一F-、Cl-和SO42-脱除性能的影响。结果表明，氢氧根型树脂对单一的F-、Cl-和SO42-均具有最优的脱除性能，但其对SO42-的平衡吸附量远高于F-和Cl-；硫酸根型树脂对F-和Cl-的脱除效果略低于氢氧根型，但其对SO42-无吸附作用。在此基础上，探究不同改性717树脂对脱硫离子液中混合离子脱除性能的影响，发现硫酸根型树脂对F-和Cl-脱除效果最优。最后，通过FT-IR和XPS表征结果可知，硫酸根型树脂吸附F-和Cl-效果最优，主要因为氯型和氢氧根型树脂优先与SO42-发生离子交换，而硫酸根型树脂则是与F-和Cl-发生离子交换。
王贵斌 , 张宏伟 , 刘丽娟 , 赵鹬 , 张栋强 . 树脂改性对脱硫离子液中氟氯离子脱除性能的影响研究[J]. 无机盐工业, 2026 , 58(1) : 18 -25 . DOI: 10.19964/j.issn.1006-4990.2025-0010
The continuous accumulation of fluoride and chloride ions in the desulfurization ionic liquid leads to a decrease in desulfurization efficiency，increased ionic liquid loss，and exacerbated equipment corrosion.Therefore，the effective removal of F- and Cl- in desulfurization ionic liquid has significant research implications.Firstly，six anion exchange resins，such as 717，D730，and D301，were preferably selected to examine their effectiveness in removing F- and Cl- from the desulfurization ionic liquid.The results showed that the 717 resin had the best F- and Cl- removal performance with equilibrium adsorption capacities of 0.020 mg/g and 3.506 mg/g，respectively.Secondly，the 717 resin was modified with chlorine⁃，hydroxide⁃ and sulfate⁃type modifications to investigate the effects of different modifications on the single F-，Cl- and SO42- removal performance.The results showed that the hydroxide⁃type resin had the optimal removal performance for single F-，Cl- and SO42-，but its equilibrium adsorption capacity for SO42- was much higher than that for F- and Cl-.The sulfate⁃type resin was slightly less effective than the hydroxide⁃type for the removal of F- and Cl-，but had no adsorption effect on SO42-.On this basis，the effects of different modifications of 717 resin on the removal performance of mixed ions in desulfurization ionic liquid were investigated，and it was found that the sulfate⁃type resin had the best effect on the removal of F- and Cl-.Finally，the FT-IR and XPS characterization results showed that the sulfate⁃type resin adsorbed F- and Cl- optimally，mainly because the chlorine⁃type and hydroxide⁃type resins were preferentially ion⁃exchanged with SO42-，while the sulfate⁃type resin was ion⁃exchanged with F- and Cl-.
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