{"title":"High Sulfur-Tolerant Pt/TiO2 for Catalytic Complete Oxidation of Toluene","authors":"Jinbo Wang, Yu Wang, Ruixiang Qin, Jing Li","doi":"10.1134/S0036024424703527","DOIUrl":null,"url":null,"abstract":"<p>The SnO<sub>2</sub> doped 0.2 wt % Pt/TiO<sub>2</sub> catalysts were prepared by wet impregnation method for the catalytic oxidation of toluene. The research focused on the SO<sub>2</sub> resistance and catalytic performance of Pt/SnO<sub>2</sub>–TiO<sub>2</sub>. The results showed that <i>T</i><sub>90</sub> (the temperature corresponding conversion of 90%) was 176°C at 1000 ppm toluene concentration and weight hourly space velocity (WHSV) of 36 000 mL h<sup>–1</sup> g<sup>–1</sup>. Adding 10 wt % SnO<sub>2</sub> to the Pt/TiO<sub>2</sub> catalyst reduced the adsorption capacity of the active component Pt for SO<sub>2</sub>, enhancing the catalyst’s resistance to SO<sub>2</sub> poisoning. Pt/SnO<sub>2</sub>–TiO<sub>2</sub> catalysts could recover to the initial activity after 9 h poisoning with 2800 ppm thiophene. The Pt/SnO<sub>2</sub>–TiO<sub>2</sub> also maintained good stability during the 60 h test at 240°C with a toluene conversion larger than 99%. A series of characterization tests including XRD, H<sub>2</sub>-TPR, and TEM revealed that Pt/SnO<sub>2</sub>–TiO<sub>2</sub> possesses a mesoporous structure and a large amount of lattice oxygen, with Pt being uniformly dispersed on the carrier surface.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 3","pages":"480 - 487"},"PeriodicalIF":0.7000,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry A","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0036024424703527","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The SnO2 doped 0.2 wt % Pt/TiO2 catalysts were prepared by wet impregnation method for the catalytic oxidation of toluene. The research focused on the SO2 resistance and catalytic performance of Pt/SnO2–TiO2. The results showed that T90 (the temperature corresponding conversion of 90%) was 176°C at 1000 ppm toluene concentration and weight hourly space velocity (WHSV) of 36 000 mL h–1 g–1. Adding 10 wt % SnO2 to the Pt/TiO2 catalyst reduced the adsorption capacity of the active component Pt for SO2, enhancing the catalyst’s resistance to SO2 poisoning. Pt/SnO2–TiO2 catalysts could recover to the initial activity after 9 h poisoning with 2800 ppm thiophene. The Pt/SnO2–TiO2 also maintained good stability during the 60 h test at 240°C with a toluene conversion larger than 99%. A series of characterization tests including XRD, H2-TPR, and TEM revealed that Pt/SnO2–TiO2 possesses a mesoporous structure and a large amount of lattice oxygen, with Pt being uniformly dispersed on the carrier surface.
期刊介绍：
Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world.
Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
