CAJ | 학술논문

以TiO2为载体,采用浸渍法制备了不同配比的MnCe复合型催化剂,并采用X射线衍射（XRD）、氧气的程序升温脱附（O2-TPD）和氢气的程序升温还原（H2-TPR）对制备的催化剂进行表征,比较了催化剂催化氧化（燃烧）甲苯的活性。研究结果表明,所制备的催化剂MnCe（y）Ox/TiO2对甲苯有明显的催化活性。当Ce/（Mn＋Ce）的摩尔比为0.1时,催化剂MnCe（0.1）Ox/TiO2的催化活性最高,甲苯的转化率达到90%时的温度为254℃。在催化剂MnOx/TiO2中掺杂少量的Ce元素,有利于活性组分Mn物种在载体表面上以更小颗粒而且更高的分散度存在,从而提高催化剂的催化活性。
이TiO2위재체,채용침지법제비료불동배비적MnCe복합형최화제,병채용X사선연사（XRD）、양기적정서승온탈부（O2-TPD）화경기적정서승온환원（H2-TPR）대제비적최화제진행표정,비교료최화제최화양화（연소）갑분적활성。연구결과표명,소제비적최화제MnCe（y）Ox/TiO2대갑분유명현적최화활성。당Ce/（Mn＋Ce）적마이비위0.1시,최화제MnCe（0.1）Ox/TiO2적최화활성최고,갑분적전화솔체도90%시적온도위254℃。재최화제MnOx/TiO2중참잡소량적Ce원소,유리우활성조분Mn물충재재체표면상이경소과립이차경고적분산도존재,종이제고최화제적최화활성。
A series of MnCe（y）O_x/TiO_2 catalysts with different Ce/（Mn＋Ce） molar ratio were prepared by im- pregnation method. Then, the prepared samples were characterized by X-ray diffraction （XRD）, oxygen tem- perature programmed desorption （O2-TPD） and hydrogen temperature programmed reduction （H2-TPR）. Cata- lytic activity tests of the prepared samples were performed in a fixed-bed reactor. The results show that the cat- alysts MnCe（y）O_x/TiO_2 had good catalytic activity for oxidation of toluene. The MnCe（0.1）Ox/TiO2 catalyst was the most active catalyst among the catalysts tested, and the reaction temperature required for 90% conver- sion of toluene was 254℃. The addition of a small amount of cerium favored the formation of smaller particles and higher dispersion of manganese species on the support. As a consequence of that, the catalytic activity of the catalyst MnCe（0.1）Ox/TiO2 was greatly improved in comnarison with the catalyst MnOx/TiO2.