文献类型：期刊文献

中文题名：碱炭比及活化温度对稻壳活性炭极微孔的影响

英文题名：Effects of Alkali/Char Ratio and Activation Temperature on Ultramicropores of Rice Husk Active Carbon

作者：李大伟[1,2];马腾飞[1,3];田原宇[1,2];朱锡锋[4];乔英云[2]

机构：[1]中国石油大学(华东)化工学院,青岛266580;[2]山东科技大学低碳能源化工重点实验室,青岛266590;[3]中国石油天然气股份有限公司辽阳石化分公司,辽阳111003;[4]中国科技大学安徽省生物质洁净能源重点实验室,合肥230026

年份：2015

卷号：30

期号：1

起止页码：17

中文期刊名：无机材料学报

外文期刊名：Journal of Inorganic Materials

收录：CSTPCD;;EI(收录号：20150600502453);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000351641500003)】；北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：National Natural Science Foundation of China (51206099); Key Research Program of the Chinese Academy of Sciences (KGZD-EW-304-3); Program for New Century Excellent Talent in University of the Ministry of Education of China (NCET-11-1031)

语种：中文

中文关键词：活性炭;极微孔;KOH;稻壳

外文关键词：active carbon; ultramicropore; KOH; rice husk

摘要：采用N2吸附、CO2吸附和热重红外联用等技术手段,考察了在KOH活化稻壳炭的过程中碱炭比和活化温度对活性炭极微孔的影响。结果表明：在不同碱炭比（0.6︰1~3︰1）和活化温度（640~780℃）下制备的稻壳活性炭,极微孔主要分布在0.42~0.70 nm。当碱炭比增加时,极微孔孔容先增大后减小;而当活化温度升高时,极微孔孔容呈降低趋势。极微孔率随碱炭比或活化温度的升高而单调递减。在活化温度为640℃、碱炭比为1：1时,可得极微孔孔容为0.149 m L/g、极微孔率达36.3%的微孔活性炭。活性炭的极微孔孔容与其在104 Pa时的CO2吸附量高度线性相关。
Porous carbons were prepared by KOH activation of rice husk char at alkali/char ratios of 0.6 ： 1 to 3 ： 1 and activation temperatures from 640℃ to 780 ℃. The obtained porous carbons were characterized using N2 adsorption and desorption technique, CO2 adsorption, TG-FTIR analyses. The results indicate that the ultramicropore size of the prepared porous carbons is mostly in the range of 0.42-0.70 nm. As the alkali/char ratio increases, the volume of ultramicropores first rises and then diminishes, whereas the volume of ultramicropores tends to decrease monotonously with the increase of activation temperature. A microporous carbon with ultramicropore volume of 0.149 mL/g, ultra- micropore fraction of 36.3%, pore volume of 0.411 mL/g, and specific surface area of 774 m2/g, can be produced by activation at 640℃ at the alkali/char ratio of 1 ： 1. The ultramicropore volume of the porous carbons and their CO2 uptake at 104 Pa display a strong linear relationship.