响应面法优化玉米秸秆生物炭的改性工艺
Optimization of corn straw-based biochar modification process by response surface methodology
岳佳怡 1杨兰文 2方柏森 1罗兴平 1朱梅 1詹小蒙 1谢贵明3
作者信息
- 1. 贵州大学化学与化工学院,贵州 贵阳 550025
- 2. 贵州大学化学与化工学院,贵州 贵阳 550025;黔东南技师学院,贵州 凯里 556000
- 3. 贵州大学化学与化工学院,贵州 贵阳 550025;贵州省绿色化工与清洁能源技术重点实验室,贵州 贵阳 550025
- 折叠
摘要
玉米秸秆通过热解可得到具有较丰富孔隙结构和较高比表面积的生物炭.然而原始生物炭存在吸附性能较差和矿质养分含量低等缺点.以MgCl2·6H2O为活化剂、磷酸盐的吸附量为指标,通过单因素试验和响应面试验对热解温度(A)、保温时间(B)和活化剂浓度(C)等热解改性条件进行优化,制备性能优良的改性生物炭.结果表明,各因素的影响显著性顺序为C>A>B,其中AB及AC交互作用显著.在热解温度为 505℃、保温时间为96 min以及活化剂浓度为1.2 mol/L的条件下制备得到对磷酸盐吸附量(25.425 mg/g)最好的改性生物炭.
Abstract
Biochar with rich pore structure and high specific surface area can be obtained through the pyrolysis of corn stalk.However,the original biochar has the disadvantages of poor adsorption performance and low mineral nutrient content.Using MgCl2·6H2 O as activator and phosphate adsorption as index,the pyrolysis modification process conditions,such as pyrolysis temperature(A),holding time(B)and activator concentration(C),are optimized via single factor test and response surface methodology,and the modified biochar with excellent performance is hence obtained.Results show that the order of significance of each factor is C>A>B,and the interactions between A and B,A and C are more significant.The modified biochar with the best phosphate adsorption capacity(25.425 mg·g-1)is prepared under the conditions that pyrolysis temperature is 505℃,holding time is 96 min and activator concentration is 1.2 mol·L-1.
关键词
响应面法/玉米秸秆/改性/生物炭/吸附Key words
response surface method/corn stalk/modification/biochar/phosphates引用本文复制引用
出版年
2024
NETL
NSTL
万方数据