Facile preparation of coal-based ultramicroporous carbon microspheres for selective CO_(2)capture  

作　　者：Mei An Tuo Guo Qingjie Guo 

机构地区：[1]Jiangmen Laboratory of Carbon Science and Technology,the Hong Kong University of Science and Technology(Guangzhou),Jiangmen,Guangzhou 529000,China [2]State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering,School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan,Ningxia 750021,China [3]Key Laboratory of Clean Chemical Engineering in Universities of Shandong,College of Chemical Engineering,Qingdao University of Science&Technology,Qingdao 266042,China

出　　处：《Carbon Resources Conversion》2024年第3期97-105,共9页碳资源转化（英文）

基　　金：supported financially by the Fundamental Research Funds for the Central Universities(Grant No.2021QN1044);the Natural Science Foundation Project of Ningxia(Grant No.2022AC03764);State Key Laboratory of High-efficiency Utilization of Coal and Green Chem-ical Engineering(Grant No.2021-K06);The key R&D projects of Ningxia(Talent special)(Grant No.2021BEB04083).

摘　　要：The basic structure of aromatic compounds that are abundant in coal is the carbonaceous precursor derived from carbon microspheres.However,it remains to be a huge challenge to prepare carbon microspheres using coal due to the complex construction and composition of coal.Herein,a simple and viable way to obtain coal-based microporous carbon microspheres was developed by means of ethanol pyrolysis and a sequential extraction strategy.The as-prepared carbon microsphere featured aspherical micron particles of a uniform size(0.6-1.6㎛),abundant O-functional groups,excellent thermal stability,high SBET(415.5-983.2 m^(2)/g),and plentiful ultra-micropores(63.15-72.72%).The coal-based carbon microsphere exhibited a noteworthy CO_(2)uptake(3.19-4.97 mmol/g at 273 K and 1.0 bar),acceptable CO_(2)/N_(2)selectivity(IAST:23-46)and moderate isosteric heats(20-32 kJ/mol).This synthetic strategy is important for the preparation of ultramicroporous carbon microspheres using coal,and the synthetic carbon microspheres have promising prospects for highly efficient CO_(2)capture.

关 键 词：COAL Ultramicroporous Carbon microspheres ETHANOLYSIS Sequential extraction CO_(2)capture 

分 类 号：O62[理学—有机化学]