航天炉炉渣改性吸附羟基污染物的研究

Study on Adsorption of Hydroxyl Pollutants with Modified Slag of HT-L Gasifier

以某航天炉炉渣为原料,分析了航天炉炉渣的性能,制备了改性航天炉炉渣,对比了未改性与改性航天炉炉渣对羟基污染物的吸附性能,并对改性航天炉炉渣的反应级数及速率控制因素进行了拟合。吸附性能研究结果表明,改性对航天炉渣的吸附性能有所提升,且酸性改性较碱性改性炉渣的吸附性能提升更明显,吸附率最高可达71%。吸附动力学的研究表明,酸性改性航天炉渣在15 min达到吸附平衡,吸附反应级数较符合表观2级动力学模型,液膜扩散对吸附速率具有主要控制作用。

The performance of slag of HT-L gasifier was analyzed and the modified slag of HT-L gasifier was prepared.The adsorption performance of the unmodified and modified slag to hydroxyl pollutants was compared,and the fitting was carried out on reaction order and rate control factors of the modified slag.The results showed that the adsorption performance of the modified slag was improved,and the performance improvement was more obvious on the acidic modified slag than alkalic modified slag,with the highest adsorption rate of 71%.The adsorption kinetics research showed that the adsorption equilibrium of acidic modified slag could be reached in 15 minutes,and the adsorption reaction order accorded with the apparent second-order kinetic model.The liquid film diffusion was the dominant factor in the control of the adsorption rate.