Abstract:

ZX-200 activated carbon powder was used to absorb the trace phosphorictungsto acid from polytetramethylene ether glycol（PTMEG），and the static adsorption characteristics were investigated. Phosphorictungsto acid showed the fastest diffusion velocity on activated carbon at 60℃. Results of adsorption kinetics and thermodynamics study showed that the adsorption is a spontaneously exothermic physical process，which fits well witha pseudo- second-order rate equation and Freundlich isotherm model. Under 60 ℃ and 6 g/h velocity，the concentration of phosphorictungsto acid in a 4452.0 g solution was reduced from 190.00 µg/g to 1.00 µg/g by 2 g of activated carbon powder in a fixed bed，which illustrated application values in the quality improvement of polytetramethylene ether glycol.

摘要：

研究了ZX-200型粉末活性炭对聚四氢呋喃中微量磷钨酸的吸附性能。对磷钨酸在ZX-200型活性炭上的静态吸附速率及吸附平衡数据进行了测定，发现60 ℃时磷钨酸的吸附扩散速率最快。考察了ZX-200型活性炭吸附磷钨酸的热力学和动力学规律。结果表明，ZX-200型活性炭对聚四氢呋喃中磷钨酸的吸附是一个自发的、放热的物理吸附过程，符合Freundlich吸附等温式和二级反应速率方程所描述的规律。在自制的吸附固定床上测定了浓度为190.06 µg/g的磷钨酸溶液的动态吸附穿透曲线，在60 ℃、6.0 g/h流量条件下穿透吸附量为4450.0 g，说明ZX-200型粉末活性炭适于吸附脱除聚四氢呋喃中微量磷钨酸，对于提高聚四氢呋喃的产品质量，具有重要的理论意义和应用价值。