摘要
将废弃物石莼与褐煤进行低温共热解,再将共热解半焦用KOH活化制备高性能活性炭材料,Box-Behnken中心组合设计-响应面法优化碱炭比、活化时间、活化温度对吸附性能的影响。结果表明:建立的2个二次多元模型方程均具有极高的显著性,失拟项不显著,方程的确定性系数高。由模型得出理论最佳工艺条件为碱炭比2.95、活化时间59.09 min、活化温度812.9℃。活性炭吸附废水亚甲基蓝的吸附过程符合拟二级动力学模型方程。
Lignite was co-pyrolyzed with garbage ulva,semi-coke of the pyrolysis products was activated by KOH to prepare the activated carbon.Box-Behnken design(BBD)and response surface methodology(RSM)were adopted to optimize activation process condition such as:the mass ratio of KOH/semi-coke,activated time,activated temperature.The results showed that the two quadratic multivariate model equations were of high significance,non-significant misfit term and high deterministic coefficient.The optimal conditions which was obtained by the model equation of mass ratio of KOH/semi-coke 2.95,activated time 59.09 min,activated temperature 812.9℃,and the theoretical value was basically consistent with the measured value.The adsorption process of activated carbon adsorption wastewater methylene blue conformed to the pseudo-second-order kinetic model equation.
作者
刘靖
何选明
柯萍
冯东征
LIU Jing;HE Xuan-ming;KE Ping;FENG Dong-zheng(Green and Intelligent Coal Chemical Engineering Technology Research Center,Wuhan University of Science and Technology,Wuhan 430081,China;School of Chemistry and Chemical Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《煤炭技术》
CAS
2019年第9期135-139,共5页
Coal Technology
基金
国家自然科学基金资助项目(51706160)
关键词
褐煤
共热解半焦
活性炭
BOX-BEHNKEN设计
响应面法
吸附机理
lignite
co-pyrolysis semi-coke
activated carbon
Box-Behnken design
response surface methodology
adsorption mechanism
