Kombinasi Sampah Plastik (PET & LDPE) Menjadi BBM Alternatif Melalui Metode Pirolisis Dengan Variasi Suhu Sebagai Upaya Circular Economy

Islami, Aquila Nuh (2026) Kombinasi Sampah Plastik (PET & LDPE) Menjadi BBM Alternatif Melalui Metode Pirolisis Dengan Variasi Suhu Sebagai Upaya Circular Economy. Undergraduate thesis, UPN Veteran Jawa Timur.

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Abstract

Plastic waste management in Surabaya faces a major challenge, with waste generation projected to reach 660 thousand tons in 2025, 16,51% of which is contributed by plastic waste. This study aims to analyze the conversion of combined Polyethylene Terephthalate (PET) and Low Density Polyethylene (LDPE) plastic waste into alternative liquid fuel through catalytic pyrolysis using 10 grams of natural zeolite catalyst to support the circular economy framework. The pyrolysis process was carried out for 60 minutes at temperature variations of 400℃ and 600℃ across various blending ratios. The results indicated that the highest oil yield was achieved in the TA4 treatment (PET 0% : LDPE 100% at 400℃) at 91,5%, while the lowest was in the TG6 (PET 100% : LDPE 0% pada at 600℃) at 6,7%. Increasing the temperature at 600℃ triggered secondary cracking, which reduced the oil recovery as products further cracked into non-condensable gases. The physical characteristics of the pyrolytic oil showed a density ranging from 0,745 to 0,922 g/mL (average 0,815 g/mL), viscosity from 1,10 to 4,20 cP (average 2 cP), and a heating value ranging from 26,50 to 44,80 MJ/kg (average 35,90 MJ/kg). These physical properties closely resemble commercial liquid fuel standards. Economic assessment using Cost Benefit Analysis (CBA) at the laboratory scale revealed a negative Net Benefit of -Rp 12.825 due to the small feed capacity (100 grams). Nevertheless, this technology holds significant sustainability potential if scaled up to an industrial level. Keywords: Catalytic Pyrolysis, PET, LDPE, Alternative Fuel, Circular Economy

Item Type: Thesis (Undergraduate)
Contributors:
ContributionContributorsNIDN/NIDKEmail
Thesis advisorMirwan, MohamadNIDN0712027603mmirwan.tl@upnjatim.ac.id
Thesis advisorCundaningsih, NurvitaNIDN0329089303nurvita.c.ft@upnjatim.ac.id
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Divisions: Faculty of Engineering > Departement of Environmental Engineering
Depositing User: Aquila Nuh Islami
Date Deposited: 21 Jul 2026 03:58
Last Modified: 21 Jul 2026 03:59
URI: https://repository.upnjatim.ac.id/id/eprint/55353

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