Catalytic Cracking of Polypropylene-Low Density Polyethylene Pyrolysis Oil over Hierarchical H-ZSM-5 Catalyst

Dwi Cahyani, Silvia (Department of Chemical Engineering, Universitas of Jambi, Indonesia)
Marlinda, Lenny (Department of Chemical Engineering, Universitas of Jambi, Indonesia)
Evrianti, Yuli (Department of Industrial Chemistry, Universitas of Jambi, Indonesia)
Rimawan, Bagas (Department of Industrial Chemistry, Universitas of Jambi, Indonesia)
Heriyanti, Heriyanti (Department of Chemistry, Universitas of Jambi, Indonesia)
Rahmi, Rahmi (Department of Chemistry, Universitas of Jambi, Indonesia)
Sutrisno, Sutrisno (Department of Chemistry, Universitas of Jambi, Indonesia)

IPTEK The Journal for Technology and Science
Vol 35, No 3 (2024)

The conversion of plastic waste into liquid fuel has become the center of attention by researchers as a way to overcome environmental problems. According to last research, the polypropylene (PP) and low-density polyethylene (LDPE) pyrolysis oil mixture was classified into hydrocarbon range diesel which have the number of carbon atom from C12-C24. Because that, the effect of LDPE/PP pyrolysis oil over hierarchical H-ZSM-5 catalyst on hydrocarbon composition of liquid fuel oil using the catalytic cracking reactor at 200 oC was investigated. Hierarchical H-ZSM-5 catalyst (hH-ZSM-5) was obtained from H-ZSM-5 modified by desilication method using NaOH. Gas chromatography-mass spectrometry showed that the liquid fuel oil from the catalytic cracking of all variations consisted of aliphatic hydrocarbons with some cycloaliphatic compounds. In ratio of 250 mL/0.5 g (oil/catalyst) aromatic hydrocarbon increased from 1.69 area% to 15.58 area% over H-ZSM5 and hH-ZSM-5 respectively. The higher oil quality with shorter hydrocarbon chains in all variations was obtained over hH-ZSM-5 catalyst, namely in the range of C7-C14 or comparable to hydrocarbon range gasoline and kerosene.