不锈钢网固载溶胶-凝胶催化剂在连续流动过程中去除Ba2+的实验设计

IF 1.6 Q3 WATER RESOURCES
Lisandra N. Bueno, Michel Zampieri Fidelis, Eduardo Abreu, Angelo Marcelo Tusset, Giane Gonçalves Lenzi
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引用次数: 0

摘要

摘要本研究描述了采用TiO2溶胶-凝胶结构催化剂的连续流系统进行光催化反应。将催化剂固定在不同的不锈钢网上,研究了钡(II)的去除。为了验证其光催化活性,进行了批量测试,并将结果与商用催化剂P25进行了比较。研究了热处理对结构催化剂的影响。通过实验设计,在不同的实验条件下进行了连续流光催化试验,验证了参数(pH和体积流量)的影响。批量试验结果表明,TiO2溶胶-凝胶催化剂在粉末悬浮液中与TiO2 P25表现出非常相似的活性(Ba2+还原32%)。在连续流过程中,在623 K的煅烧温度下,催化剂在网面上的粘附力最大。实验设计表明pH是研究条件下的一个重要参数。观察到,在pH值接近7的情况下,零电荷点和较低流速的研究也表明,在连续流动反应器中,停留时间为83分钟,可以获得~ 20%的Ba2+离子去除率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sol–gel catalysts immobilized on stainless steel meshes for Ba2+ removal in a continuous flow process: an experimental design
Abstract This study describes the use of a continuous flow system for photocatalytic reactions employing a TiO2 sol–gel structured catalyst. The catalyst was immobilized on various stainless steel meshes to investigate the barium(II) removal. To verify its photocatalytic activity, batch tests were carried out and the results were compared to the commercial catalyst P25. Effects of thermal treatment on the structured catalyst were investigated. The continuous flow photocatalytic tests were conducted under different experimental conditions through an experimental design to verify the effect of the parameters (pH and volume flow). The results of the batch tests indicated that the TiO2 sol–gel catalyst showed very similar activity to the TiO2 P25 when used in powder suspension (32% reduction of Ba2+). In the continuous flow process, maximum adhesion of catalysts on meshes was found at a calcination temperature of 623 K. The experimental design indicated the pH as a significant parameter in the studied conditions. It was observed that at pH levels close to 7, also indicated by the study of the zero charge point and lower flow rates, it was possible to obtain ∼20% removal of Ba2+ ions, in a continuous flow reactor with a residence time of 83 min.
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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