Preparasi dan Karakterisasi Katalis CoMo/H-Zeolit Y
Abstract: Preparation and
characterization of catalyst CoMo/H-zeolite Y has been done. Catalyst was
prepared from NH4Y-zeolite then heated 115oC for 1 hto eliminate water then
calcined at 550oC for 2 h to evaporate ammonia,produced HY-zeolite (HYZ) sample.
Impregnation of CoMo metals on the HYZsample was done by co-impregnation
method, where the HYZ (10 g) was mixed with (NH4)6MO7O24.4H2O in 24 mL
aquabidest and 3 mL of ammonia thenstirred of 60oC for 2 h. This mixture was
then mixed with Co(NO3)2.6H2O in 24 mL aquabidest and 3 mL of ammonia then
stirred of 60oC for 2 h. The resulting sample was filtered and dried. The dried
sample was then calcined under N2 stream at temperature of 550oC for 2 h,
followed by oxidized with O2 then reduced with H2 stream at temperature 400oC
for 2 h, respectively produced CoMo/HY catalyst. Characterization of the
catalyst included analysis of NH3 groups was done with by infra red
spectrofotometry (IR), the crystallinity with Xray diffraction (XRD) and the
acidity was calculated with NH3 absorption by gravimetry method, metal content
on the catalyst was determined by atomic absorption spectroscopy (AAS). FTIR
result of CoMo/HY catalyst showed thatdisappeared ammonia was after heating.
The XRD date indicated the increase of catalyst crystallinity as the following:
NH4Y< died NH4Y < HY< CoMo/HY. CoMo/HY catalyst has average acidity =
6,87 mmol/g where as the HY has average acidity = 7,66 mmol/g. The metal
content in the HY was 8023 and 7681 ppm, for Co and Mo respectively.
Keywords: Catalyst, CoMo, H-Y
zeolite
Penulis: Rustam Musta
Kode Jurnal: jpfisikadd100121
