Construction and desulfurization performance of Fe-Mn desulfurization sorbents based on modified polyacrylonitrile nanofibers

LI Haowen; ZHANG Man; FEI Pengfei; LI Fu; MI Jie; WANG Jiancheng; FENG Yu

doi:10.12434/j.issn.2097-2547.20240035

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Construction and desulfurization performance of Fe-Mn desulfurization sorbents based on modified polyacrylonitrile nanofibers

- Construction and desulfurization performance of Fe-Mn desulfurization sorbents based on modified polyacrylonitrile nanofibers
- Vol. 49, Issue 12, Pages: 86-95(2024)
- 作者机构：
  
  1.太原理工大学轻纺工程学院，山西晋中 030060
  2.太原理工大学省部共建煤基能源清洁高效利用国家重点实验室，山西太原 030024
  3.太原理工大学煤科学与技术教育部重点实验室，山西太原 030024
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240035
  CLC： TQ546.5
- Published：25 December 2024，
  
  Received：29 January 2024，
  
  Revised：08 March 2024，
- 稿件说明：
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李浩文,张曼,费鹏飞等.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.

LI Haowen,ZHANG Man,FEI Pengfei,et al.Construction and desulfurization performance of Fe-Mn desulfurization sorbents based on modified polyacrylonitrile nanofibers[J].Low-carbon Chemistry and Chemical Engineering,2024,49(12):86-95.
李浩文,张曼,费鹏飞等.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. DOI： 10.12434/j.issn.2097-2547.20240035.

LI Haowen,ZHANG Man,FEI Pengfei,et al.Construction and desulfurization performance of Fe-Mn desulfurization sorbents based on modified polyacrylonitrile nanofibers[J].Low-carbon Chemistry and Chemical Engineering,2024,49(12):86-95. DOI： 10.12434/j.issn.2097-2547.20240035.

摘要

聚丙烯腈（PAN）纳米纤维对金属离子吸附量较低，由此制备的脱硫剂性能较差。选取聚乙烯吡咯烷酮（PVP）和盐酸羟胺（HAC）分别对PAN纳米纤维进行改性，通过静电纺丝和表面改性得到了改性载体前驱体，后通过浸渍和热处理制得了铁锰双金属脱硫剂。研究了PVP添加量、HAC改性温度和金属盐浓度对脱硫剂结构和性能的影响。SEM分析表明，PVP和HAC改性均能得到具有良好纤维形貌的脱硫剂，活性组分在纤维表面分散性良好。TEM和XPS分析表明，Fe

和MnO

成功负载在纤维表面。XRD分析表明，脱硫剂硫化后生成了Fe

。织构性质分析表明，改性后脱硫剂的比表面积明显增大，未改性脱硫剂为5.91 m

/g，改性脱硫剂最大为8.10 m

/g（PVP改性）和14.23 m

/g（HAC改性）。ICP-OES分析表明，改性明显提高了脱硫剂活性组分负载量（质量分数），活性组分负载量从0.93%提升至最高22.65%（PVP改性）和30.97%（HAC改性）。脱硫性能测试表明，改性得到的铁锰双金属脱硫剂的穿透硫容（以100 g脱硫剂脱除的硫化氢质量计）由0.75 g分别提升至最高4.72 g（PVP改性）和6.70 g（HAC改性）。

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 ad

dition

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 Fe

and MnO

on the fiber surface. XRD analysis reveals the formation of Fe

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

Keywords

coal gas desulfurizationelectrospinningcarbon nanofibersFe-Mn desulfurization sorbentmodification

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