《环境工程学报》获“2017年度科学传播特殊贡献单位”荣誉称号    《环境工程学报》关于“优先数字出版”的通告    《环境工程学报》启用DOI通知设为首页|加入收藏
高锰酸钾改性球形中孔炭的甲醛吸附性能
Formaldehyde adsorption performance of KMnO4 modified mesoporous carbon spheres
投稿时间:2017-12-13  
DOI:10.12030/j.cjee.201712079
中文关键词:  球形中孔炭  甲醛  吸附  改性
英文关键词:mesoporous carbon spheres  formaldehyde  adsorption  modification
基金项目:国家自然科学基金资助项目 (U1710252, 21506061);中国科协青年人才托举工程和上海市青年科技启明星计划 (17QB1401700)
作者单位E-mail
蒋昕楠 华东理工大学化学工程联合国家重点实验室上海 200237 johnsonnanj@163.com 
孔振凯 华东理工大学化学工程联合国家重点实验室上海 200237  
王际童 华东理工大学化学工程联合国家重点实验室上海 200237  
乔文明 华东理工大学化学工程联合国家重点实验室上海 200237
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 
 
凌立成 华东理工大学化学工程联合国家重点实验室上海 200237  
摘要点击次数: 112
全文下载次数: 143
中文摘要:
      采用球形中孔炭为载体,通过浸渍法担载高锰酸钾(KMnO4)制备高容量甲醛吸附剂。通过低温氮气吸附法、扫描电镜(SEM)、X射线光电子能谱(XPS)表征了球形中孔炭的孔结构及表面化学,并采用固定床测试了相应的球形中孔炭的动态甲醛吸附性能。实验结果表明:经过KMnO4浸渍改性后,球形中孔炭保持良好的球形度,并保留一定的比表面积和孔容,有利于甲醛的扩散以及甲醛与吸附活性位的接触;同时,表面C—O、C=O等含氧官能团数量增加,有效提高了甲醛的吸附性能。在KMnO4浓度为30%时性能最佳,吸附穿透容量和饱和容量分别为30.55 mg·g-1和66.04 mg·g-1,是未改性球形中孔炭的5.2倍和3.4倍。因此,KMnO4改性是提升球形中孔炭甲醛吸附性能的有效手段。
英文摘要:
      Mesoporous carbon spheres (MCS) was prepared and modified with potassium permanganate (KMnO4) solution by impregnation to achieve formaldehyde (HCHO) adsorbent with high adsorption capacity. The porous structure, morphology and surface chemistry of the samples were characterized by N2 adsorption (77 K), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS), respectively. And the performance of HCHO adsorption was tested in a fixed-bed reactor. Results indicated that modified MCS still provided a good sphericity and maintained the considerable porosity and the accessibility of interfacial area, being favorable for HCHO diffusion and adsorption. Meanwhile, the number of functional groups such as C—O and C=O on the surface of modified MCS increased, which effectively enhanced the adsorption performance to HCHO. The modified MCS with 30% KMnO4 gave the highest adsorption capacity with the breakthrough capacity of 30.55 mg·g-1 and the saturation capacity of 66.04 mg·g-1, which are 4.2 and 2.4 times higher than those of MCS without KMnO4 treatment. So, KMnO4 modification is a promising method to promote the adsorption performance of MCS to HCHO.
下载PDF全文  HTML   查看/发表评论  下载PDF阅读器