Preparation of carbon molecular sieves from carbon micro and nanofibers for sequestration of CO2

被引:22
作者
Bikshapathi, Mekala [1 ]
Sharma, Ashish [1 ]
Sharma, Ashutosh [1 ,2 ]
Verma, Nishith [1 ]
机构
[1] Indian Inst Technol Kanpur, Dept Chem Engn, Kanpur 208106, Uttar Pradesh, India
[2] Indian Inst Technol Kanpur, DST Unit Nanosci, Kanpur 208106, Uttar Pradesh, India
关键词
Carbon molecular sieve (CMS); Activated carbon fiber (ACF); Carbon nanofiber (CNF); Microwave heating; CO2; Adsorption; CHEMICAL-VAPOR-DEPOSITION; ACTIVATED CARBON; GAS SEPARATION; PALM SHELL; ADSORPTION; FIBERS; BENZENE; METHANE;
D O I
10.1016/j.cherd.2010.09.009
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this study, a hierarchal web of carbon micro and nanofibers was used as a precursor for the synthesis of a carbon molecular sieve (CMS). CMSs were prepared by thermal treatment of carbon fibers using a microwave heating device. The heating power and treatment time were optimized for the maximum performance of the prepared CMS for the separation of CO2 at low concentrations from the gaseous mixture of CO2 and air under dynamic (flow) conditions. Based on the experimental data, microwave power input of 240W and treatment time of 15 min were found to be suitable for the maximum uptake of CO2 by CMS. Adsorption breakthrough curves were obtained at different gas flow rates and CO2 concentrations. CMSs prepared from the hierarchal web of carbon micro and nanofibers were found to be superior to those prepared from ACF. The CO2 uptake was determined to be approximately 0.88 mg/g and 10 mg/g at concentrations of 500 ppm and 5000 ppm, respectively, in air. (C) 2010 The Institution of Chemical Engineers. Published by Elsevier By. All rights reserved.
引用
收藏
页码:1737 / 1746
页数:10
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