CAJ | 학술논문

通过掺杂不同金属元素对SO_4~(2-)/ZrO_2型固体超强酸进行改性,应用共沉淀法制备了一系列固体酸催化剂SO_4~(2-)/ZrO_2、SO_4~(2-)/ZrO_2-ZnO、SO_4~(2-)/ZrO_2-Fe_2O_3、SO_4~(2-)/ZrO_2-CuO、SO_4~(2-)/ZrO_2-Al_2O_3,利用氧气作氧化剂进行催化氧化脱除噻吩硫化物动力学实验.研究结果表明,掺杂了Zn、Fe和Cu的SO_4~(2-)/ZrO_22型催化剂催化氧化效果较SO_4~(2-)/ZrO_2都有明显提高,其中添加了金属Zn的SO_4~(2-)/ZrO_2-ZnO催化氧化效果最好,在反应温度为50℃,能达到100%的脱硫率.对合成的系列固体酸进行了X射线衍射(XRD)、氨程序升温脱附(NH3-TPD)的表征,结果表明,催化剂样品中四方相ZrO_2的含量越高,表面酸含量越大,其催化氧化噻吩硫化物的活性越高.
통과참잡불동금속원소대SO_4~(2-)/ZrO_2형고체초강산진행개성,응용공침정법제비료일계렬고체산최화제SO_4~(2-)/ZrO_2、SO_4~(2-)/ZrO_2-ZnO、SO_4~(2-)/ZrO_2-Fe_2O_3、SO_4~(2-)/ZrO_2-CuO、SO_4~(2-)/ZrO_2-Al_2O_3,이용양기작양화제진행최화양화탈제새분류화물동역학실험.연구결과표명,참잡료Zn、Fe화Cu적SO_4~(2-)/ZrO_22형최화제최화양화효과교SO_4~(2-)/ZrO_2도유명현제고,기중첨가료금속Zn적SO_4~(2-)/ZrO_2-ZnO최화양화효과최호,재반응온도위50℃,능체도100%적탈류솔.대합성적계렬고체산진행료X사선연사(XRD)、안정서승온탈부(NH3-TPD)적표정,결과표명,최화제양품중사방상ZrO_2적함량월고,표면산함량월대,기최화양화새분류화물적활성월고.
The solid super acid catalyst SO_4~(2-)/ZrO_2 was modified by doping with different metal oxides,and then a series of modified solid super acid catalysts such as, SO_4~(2-)/ZrO_2, SO_4~(2-)/ZrO_2-ZnO, SO_4~(2-)/ZrO_2-Fe_2O_3, SO_4~(2-)/ZrO_2-CuO and SO_4~(2-)/ZrO_2-Al_2O_3 were obtained by coprecipitation method. With oxygen as oxidant,the catalytic oxidation kinetic experiments of thiophene over the modified solid super acid catalysts were carried out. Results showed that doping Zn,Fe,Cu metal oxides to SO_4~(2-)/ZrO_2 can improve the catalytic oxidation activity of the catalysts, of which the catalytic activity of SO_4~(2-)/ZrO_2-ZnO was the highest and the conversion efficiency of thiophene can reach 100% at 50℃. The characterization results of the catalysts by powder X-ray diffraction (XRD)and temperature programmed desorption of ammonia (NH_3-TPD) showed that the more the content of T-ZrO_2 on the catalyst surfaces was,the more its acid amounts was,and thus it had higher catalytic activity.