CAJ | 학술논문

以TiO2为载体,利用分步浸渍法制备了Pt-CeO2/TiO2、Pt-ZrO2/TiO2、Pt-La2O3/TiO2、Pt-Pr2O3/TiO2和Pt-SnO2/TiO2催化剂,并催化湿式氧化高浓度苯酚废水.Pt-CeO2/TiO2催化剂的活性最好,在反应温度为160℃、氧分压为2.25 MPa,反应时间为2 h的条件下,苯酚和COD的去除率分别为87.53%和72.06%.进一步研究助剂含量对催化剂性能的影响,当 CeO2负载量为12.5%时,催化剂 Pt-CeO2/TiO2的催化性能最佳.XRD 和TEM结果表明,助剂CeO2的引入起到降低Pt的粒径,提高Pt在载体表面的分散度的作用.
이TiO2위재체,이용분보침지법제비료Pt-CeO2/TiO2、Pt-ZrO2/TiO2、Pt-La2O3/TiO2、Pt-Pr2O3/TiO2화Pt-SnO2/TiO2최화제,병최화습식양화고농도분분폐수.Pt-CeO2/TiO2최화제적활성최호,재반응온도위160℃、양분압위2.25 MPa,반응시간위2 h적조건하,분분화COD적거제솔분별위87.53%화72.06%.진일보연구조제함량대최화제성능적영향,당 CeO2부재량위12.5%시,최화제 Pt-CeO2/TiO2적최화성능최가.XRD 화TEM결과표명,조제CeO2적인입기도강저Pt적립경,제고Pt재재체표면적분산도적작용.
Pt/TiO2,Pt-CeO2/TiO2,Pt-ZrO2/TiO2,Pt-La2O3/TiO2,Pt-Pr2O3/TiO2 and Pt-SnO2/TiO2 catalysts were prepared by the impregnation method,and their catalytic activities were studied through catalytic wet air oxidation experiments of high-concentration phenol wastewater. The results show that the catalytic activity of Pt-CeO2/TiO2 is the highest among those catalysts;under the conditions of reaction time 2 h,160 ℃ and 2.25 MPa, the removal rates of phenol and COD are about 87.53% and 72.06% , respectively. When the content of CeO2 is 12.5%, the Pt-CeO2/TiO2 catalyst has the highest catalytic activity. XRD and TEM results show that the CeO2 additive can reduce the size of Pt and improve the dispersion of Pt.