دانلود مقاله Impregnation vs. Sol-Gel Synthesis and Physicochemical Characterizations of Ni/Al2O3-MgO Nanocatalyst Used for Dry Reforming of Methane
سال انتشار: ۱۳۹۱
محل انتشار: چهاردهمین کنگره ملی مهندسی شیمی ایران
تعداد صفحات: ۵
Sogand Aghamohammadi – Chemical Engineering Faculty, Sahand University of Technology, Tabriz, Iran
Mohammad Haghighi –
Samira Karimipour –
Carbon dioxide reforming of methane is an interesting route for synthesis gas production. The present research deals with catalyst development for dry reforming of methane with the aim ofreaching the most stable catalyst. Effect of preparation method, one of the most significant variables, on the properties of the catalyst was taken in to account. The Ni/Al2O3-MgO catalystswere prepared via sol-gel and impregnation methods and characterized with XRD, FESEM, FTIRand BET techniques. The reforming reactions were carried out using constant feed ratio and gas hourly space velocity (GHSV) at different reaction temperatures to indentify the influence ofreaction temperature. FESEM images indicate uniform particle size distribution for the samplesynthesized with sol-gel method. It has been found that the sol-gel method has the potential to improve catalyst desired properties resulting in catalytic performance enhancement. The highestyield of products was obtained at 850°C for both of the catalysts. During the 10 h stability test, H2 and CO yield gained higher values in the case of sol-gel made catalyst compared to impregnatedone.