低碳化学与化工2024，Vol.49Issue(12)：86-95,10.DOI:10.12434/j.issn.2097-2547.20240035
基于改性聚丙烯腈纳米纤维的铁锰脱硫剂构筑及其脱硫性能
Construction and desulfurization performance of Fe-Mn desulfurization sorbents based on modified polyacrylonitrile nanofibers
摘要
Abstract
Polyacrylonitrile(PAN)nanofibers exhibit low adsorption capacities for metal ions,resulting in poor desulfurization performance of the prepared desulfurization sorbents.Polyvinylpyrrolidone(PVP)and hydroxylamine hydrochloride(HAC)were selected to modify PAN nanofibers.Through electrospinning and surface modification,modified support precursors were obtained,and subsequently,Fe-Mn bimetallic desulfurization sorbents were prepared via impregnation and heat treatment.The effects of PVP addition,HAC modification temperature and metal salt concentration on the structure and performance of the desulfurization sorbents were investigated.SEM analysis indicates that both PVP and HAC modifications can obtain desulfurization sorbents with good fibrous morphologies and the active components have good dispersion on the fiber surface.TEM and XPS analysis confirms the successful loading of Fe2O3 and MnO2 on the fiber surface.XRD analysis reveals the formation of Fe7S8 after desulfurization.Textural property analysis demonstrates a significant increase in the specific surface area of the modified desulfurization sorbents.The unmodified desulfurization sorbent exhibits a specific surface area of 5.91 m²/g,while the modified desulfurization sorbent reaches a maximum of 8.10 m²/g(PVP modification)and 14.23 m²/g(HAC modification).ICP-OES analysis shows that the modification significantly enhances the loading(mass fraction)of active components,increasing from 0.93%to a maximum of 22.65%(PVP modification)and 30.97%(HAC modification).Desulfurization performance tests indicate that the breakthrough sulfur capacity(measured as the mass of hydrogen sulfide removed per 100 g of desulfurization sorbent)increases from 0.75 g to a maximum of 4.72 g(PVP modification)and 6.70 g(HAC modification),respectively.关键词
煤气脱硫/静电纺丝/碳纳米纤维/铁锰脱硫剂/改性Key words
coal gas desulfurization/electrospinning/carbon nanofibers/Fe-Mn desulfurization sorbent/modification分类
化学化工引用本文复制引用
李浩文,张曼,费鹏飞,李甫,米杰,王建成,冯宇..基于改性聚丙烯腈纳米纤维的铁锰脱硫剂构筑及其脱硫性能[J].低碳化学与化工,2024,49(12):86-95,10.基金项目
国家自然科学基金(22378292,21908156) （22378292,21908156）
山西省应用基础研究计划(202303021211072,202303021221023) （202303021211072,202303021221023）
山西省绿色环境催化关键技术研发科技创新人才团队(202204051002025). （202204051002025）
