Uji Aktivitas dan Regenerasi Katalis NiMo/Z pada Reaksi Hidrorengkah Fraksi Sampah Plastik Menjadi Fraksi Bensin
ABSTRACT: Activity test and
regeneration of NiMo/active natural zeolite catalyst for hydrocracking of waste
plastic fraction of polyprophylene (PP) type have been carried out. The
catalysts was prepared by loading Mo followed by Ni Metals onto the natural
zeolite (Z) sample, then calcined at 500oC, oxidized and reduced at 400oC under
nitrogen, oxygen and hydrogen stream, respectively. The characterization of
catalysts including spesific surface area, average pore radius, and total pore
volume were performed by gas sorption analyzer, amount of total acid sites was
determined by gas sorption method, and acid site strength was confirmed by IR
spectroscopy. The hydrocracking process was carried out in a semi-flow reactor
system at 360 oC and catalyst:feed ratio 0.5 under hydrogen stream (150
mL/hour). The feed was vaporized from the pyrolisis reactor into the
hydrocracking reactor. A liquid product was collected and analyzed by gas
chromatography (GC) and gas chromatography-mass spectroscopy (GC-MS). The
characterization results showed that spesific surface area, average pore
radius, and total pore volume of the Z sample decreased after loading of the Ni
and Mo metals. Amount of total acid sites of the NiMo/Z catalyst was higher
than that of the Z sample. The activity of NiMo/Z catalyst decreased after
several continously runs. Its regeneration produced the NiMo/Z reg catalyst
with similar activity and selectivity to the fresh catalyst (NiMo/Z). The
activity of catalysts at the optimum condition followed the order of NiMo/Z
reg>NiMo/Z>Z (conversion of hydrocarbon C>12) and NiMo/Z
reg>NiMo/Z>Z (total yield of gasoline fraction). The selectivity of catalysts
for C7-C8 product followed the order of Z>NiMo/Z>NiMo/Z reg.
Penulis: Rodiansono, Wega
Trisunaryanti
Kode Jurnal: jpkimiadd050048
