孔结构在MgFe2O4改性活性炭脱硫过程中的作用
Role of pore structure of MgFe2O4 modified activated carbon in desulfurization process
陈铭 1梁晓怿1
作者信息
- 1. 华东理工大学化工学院,上海 200237
- 折叠
摘要
合成了一系列MgFe2O4 基改性球形活性炭吸附剂,用于室温下去除加湿空气中的H2S,同时研究了孔隙结构对吸附性能的影响.通过SEM-EDS、氮气吸附-脱附和XRD对材料进行表征.结果表明,样品MFOR2-20 对H2S的吸附性能最好,达到 204 mg/mL(571 mg/g);脱硫过程中形成的FeOOH作为中间体起到催化作用;产物包括单质硫和硫酸盐.H2S的脱除包括吸附和催化氧化 2 种方式,H2S的催化氧化一直持续到催化剂的所有有效孔被氧化产物堵塞.较小的孔隙可以增强催化剂的分散性、提供吸附中心并储存氧化产物.
Abstract
A series of MgFe2O4-based modified spherical activated carbon absorbents are synthesized to remove H2S from humidified air at room temperature.The influence of pore structure on adsorption performance is studied.The catalysts are characterized through SEM-EDS,nitrogen adsorption-desorption,and XRD.Results show that MFOR2-20 sample shows the best adsorption performance for H2S,reaching 204 mg·mL-1 or 571 mg·g-1.FeOOH formed as an intermediate in the desulfurization process plays a catalytic role.Desulfurization products include elemental sulfur and sulfates.Removal of H2S includes two routines:adsorption and catalytic oxidation.Catalytic oxidation of H2S continues until all the effective pores of the catalyst are blocked by the oxidation products.Smaller pores can enhance the dispersion of the catalyst,provide adsorption centers and store oxidation products.
关键词
活性炭/H2S吸附/固定床/MgFe2O4/孔隙结构Key words
activated carbon/H2S adsorption/fixed bed/MgFe2O4/pore structure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据