Such results suggest that cobalt and molybdenum are associated in a fixed proportion and that their distribution on the support surface, which in turn improves catalyst performance, could be modified by the catalyst preparation conditions. The drying temperature was found to improve the activities, with the lowest temperature showing the best performance in terms of dibenzothiophene degree of conversion. Nanocrystalline cobalt aluminate (CoAl 2 O 4) was prepared by novel solgel method using aluminum nitrate, copper nitrate and lactose without adding external surfactant.Moreover, lactose plays role as capping agent, reducing agent, and chelate agent in the synthesis CoAl 2 O 4 nanoparticles. The ratio of about 0.4 exhibited the highest rate constant. CHB/BP ratio as high as 0.2 was obtained for Co/Mo of 0.2–0.4, while for higher Co/Mo ratios, no CHB was observed. Small size cobalt nanoparticles are highly dispersed on different crystalline forms of Ta 2 O 5 (amorphous, T, M, H) by impregnation method, which is then introduced to catalytic oxidation of CO. The catalyst activities based on dibenzothiophene conversion rate constants and product (biphenyl BP and cyclohexylbenzene CHB) distributions, depended strongly on the Co/Mo ratios. Changes in grain sizes and binding energy due to the cobalt–molybdenum interactions have been observed. Samples of the catalysts were characterized using SEM and XPS techniques. Cobalt aluminate is frequently integrated into the initial or primary cluster dipping process, primarily because of its finely grained particles. Hydrodesulfurization (HDS) of dibenzothiophene (DBT) was tested at 550–683 K and 10 atm. Cobalt aluminate Al2Co2O84 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. The catalysts were converted to active sulfide form using dimethyldisulfide. ![]() The active components ions were loaded on the alumina via an incipient wetness impregnation method. Cobalt Aluminate - Uses in Pottery - Pigment Blue 28. A series of g-alumina-supported cobalt–molybdenum hydrodesulfurization catalysts have been prepared with different ratios of cobalt to molybdenum (0.0–1.0) and under different drying temperatures (323, 373 and 423 K).
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