Thermal regeneration of spent coal-based activated carbon using carbon dioxide: process optimisation, Methylene Blue decolorisation isotherms and kinetics
Thermal regeneration of spent coal-based activated carbon using carbon dioxide: process optimisation, Methylene Blue decolorisation isotherms and kinetics
复制标题
使用二氧化碳热再生废煤基活性炭：工艺优化、亚甲基蓝脱色等温线和动力学
DOI：
10.1111/j.1478-4408.2012.00401.x
复制
发表时间：
2012-12-01
影响因子：
1.8
通讯作者：
Xia, Hong-Ying
中科院分区：
文献类型：
--
作者：
Duan, Xin-Hui;Kannan, Chandrasekar Srinivasa;Xia, Hong-Ying
以硅工业的废煤基活性炭为原料，以二氧化碳为再生剂进行活性炭的再生。利用响应面法对再生工艺进行优化，最佳再生条件为：再生温度985℃；再生时间120 min；二氧化碳流速为600ml /min。在最佳再生条件下得到的活性炭碘值为1071 mg/g，得率为67%，比表面积为1270 m2/g，孔体积为0.91 cm3/g。对再生碳进行了去除亚甲基蓝染料的试验。最大吸附量为395 mg/g，平衡数据符合Langmuir等温线模型。动力学数据表明，最佳拟合符合准二阶动力学模型。
Spent coal-based activated carbon from the silicon industry has been used as raw material for the regeneration of activated carbon, with carbon dioxide as the regenerating agent. The regeneration process was optimised using response surface methodology and the optimum regeneration conditions were: regeneration temperature 985 degrees C; regeneration time 120 min; and carbon dioxide flow rate of 600 ml/min. The iodine number and yield of the activated carbon obtained under the optimum regeneration conditions were 1071 mg/g and 67%, with a BrunauerEmmetTeller surface area of 1270 m2/g and pore volume of 0.91 cm3/g. The regenerated carbon was tested for the removal of Methylene Blue dyes. The maximum adsorption capacity was found to be 395 mg/g and the equilibrium data fitted to the Langmuir isotherm model. The kinetic data indicated that the best fit corresponds to the pseudo-second-order kinetic model.