含氮球形中孔炭负载[Bmim]Zn_(2)Cl_(5)吸附剂的制备及其硫化氢和氨气脱除性能研究  

Synthesis of nitrogen-doped and mesoporous carbon spheres decorated with [Bmim]Zn_(2)Cl_(5) for hydrogen sulfide and ammonia removal

作　　者：唐熊辉 王骁 苏洪涛 马成 凌立成[3] Tang Xiong-hui;Wang Xiao;Su Hong-tao;Ma Cheng;Ling Li-cheng(Military Representative office of Navy in Huludao Area,Liaoning Huludao 125004,China;Wuhan Second Ship Design and Research Institute,Hubei Wuhan 430205,China;Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education),East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]海装沈阳局驻葫芦岛地区军事代表室,辽宁葫芦岛125004 [2]武汉第二船舶设计研究所,湖北武汉430205 [3]华东理工大学特种功能高分子材料及相关技术教育部重点实验室,上海200237

出　　处：《炭素技术》2024年第2期36-42,共7页Carbon Techniques

基　　金：国家自然科学基金(U21A2060);中央高校基本科研业务费专项资金资助(JKD01241701)。

摘　　要：以间苯二酚-甲醛为碳源,三聚氰胺为氮源,二氧化硅溶胶为模板,通过溶胶-凝胶与悬浮聚合工艺制备出毫米尺寸(0.4~0.8 mm)且比表面积和孔容分别高达915 m^(2)·g^(-1)和1.96 cm^(3)·g^(-1)的含氮球形中孔炭。在含氮球形活性炭制备基础上,负载活性组分离子液体[Bmim]Zn_(2)Cl_(5)用于硫化氢和氨气的脱除。研究结果表明,含氮球形活性炭的表面氮掺杂和中孔结构有利于活性组分弥散负载以及脱硫产物的存储,当[Bmim]Zn_(2)Cl_(5)负载量达到50%时,吸附剂对硫化氢和氨气的穿透吸附容量分别达到790 mg/g和41.3 mg/g;且吸附机制与吸附剂失效研究表明,硫化氢脱除归结于炭材料孔隙结构内的催化氧化,而氨气的脱除主要为负载活性组分的化学吸附。Nitrogen-doped and mesoporous carbon spheres with the size of 0.4~0.8 mm, a high surface area of 915 m^(2)·g^(-1),and a large pore volume of up to 1.96 cm^(3)·g^(-1) were synthesized via sol-gel and suspension polymerization method using resorcinol-formaldehyde as the carbon source, melamine as the nitrogen precursor, and colloidal silica as the hard template.The as-prepared carbon spheres were impregnated with ion liquid [Bmim]Zn_(2)Cl_(5) as an adsorbent for hydrogen sulfide and ammonia.It is found that the mesoporous structure and nitrogen-doped surface could facilitate the uniform distribution of active component [Bmim]Zn_(2)Cl_(5) and sulfur-containing products after desulfurization on the pores of carbon spheres.The adsorbent with [Bmim]Zn_(2)Cl_(5) mass loading of 50% exhibits breakthrough capacities of 790 mg/g and 41.3 mg/g for hydrogen sulfide and ammonia, respectively.Additionally, the investigation of the spent adsorbent and mechanism reveals that the hydrogen sulfide removal is based on the catalysis of carbon-based adsorbents while the ammonia removal is due to the chemical adsorption of the active component.

关 键 词：含氮球形中孔炭 离子液体 硫化氢 氨气 

分 类 号：TQ424.1[化学工程]