Produksi Bahan Bakar Fraksi Setara Gasoline (C5-C12) Dari Limbah Polistirena Melalui Pirolisis Menggunakan Katalis Zeolit HZSM-5/Keramik

Baihaqi, Ahmad Firdaus (2026) Produksi Bahan Bakar Fraksi Setara Gasoline (C5-C12) Dari Limbah Polistirena Melalui Pirolisis Menggunakan Katalis Zeolit HZSM-5/Keramik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Produksi bahan bakar fraksi setara bensin dari limbah polistirena telah dilakukan melalui proses pirolisis katalitik menggunakan kombinasi katalis zeolit HZSM-5 dan keramik berbasis alumina dari limbah busi. Proses perengkahan dilakukan pada suhu 350 °C selama 40 menit dengan variasi persentase berat katalis sebesar 0,5%; 0,75%; dan 1% terhadap massa limbah polistirena. Karakterisasi katalis dilakukan menggunakan metode NH₃-TPD, FESEM-EDX, FTIR, dan XRD, sedangkan produk hasil pirolisis dianalisis melalui pengujian densitas, viskositas, GC-MS, serta pengukuran angka oktan dan setana. Hasil penelitian menunjukkan bahwa variasi katalis 0,5% menghasilkan densitas paling mendekati standar bensin (0,786 g/mL) dengan viskositas 0,934 cP. Analisis GC-MS memperlihatkan dominasi senyawa hidrokarbon ringan (C₅–C₁₂) yang merupakan karakteristik fraksi bensin, sedangkan fraksi berat seperti solar hanya muncul dalam jumlah minor. Produk memiliki nilai Research Octane Number (RON) sebesar 115 dan Motor Octane Number (MON) sebesar 104,3, jauh di atas standar bensin, sementara Cetane Number bernilai 0, menandakan ketidakcocokan untuk mesin diesel. Karakteristik ini menunjukkan bahwa katalis HZSM-5/keramik memiliki selektivitas tinggi terhadap pembentukan fraksi bensin.
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The production of gasoline-equivalent fuel fraction from polystyrene waste was carried out through catalytic pyrolysis using a combination of HZSM-5 zeolite and alumina-based ceramic derived from spark plug waste. The cracking process was conducted at 350 °C for 40 minutes with catalyst weight variations of 0,5%; 0,75%; and 1% relative to the polystyrene mass. Catalyst characterization was performed using NH₃-TPD, FESEM-EDX, FTIR, and XRD, while the pyrolysis products were analyzed through density and viscosity measurements, GC-MS analysis, and octane and cetane number determination. The results showed that the 0.5% catalyst variation produced the closest density to gasoline standards (0.786 g/mL) with a viscosity of 0.934 cP. GC-MS analysis revealed a dominance of light hydrocarbons (C₅–C₁₂), characteristic of gasoline fractions, while heavier fractions such as diesel appeared only in minor amounts. The product exhibited a Research Octane Number (RON) of 115 and a Motor Octane Number (MON) of 104.3, far exceeding gasoline standards, while the Cetane Number was 0, indicating unsuitability for diesel engines. These characteristics demonstrate that the HZSM-5/ceramic catalyst has high selectivity toward gasoline fraction formation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Keramik, Limbah Polistirena (PS), Pirolisis Katalitik, Zeolit HZSM-5 Catalytic Pyrolysis, Ceramic, Polystyrene Waste, Zeolit HZSM-5
Subjects:	Q Science > QD Chemistry > QD281 Pyrolysis
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Ahmad Firdaus Baihaqi
Date Deposited:	03 Feb 2026 09:24
Last Modified:	03 Feb 2026 09:24
URI:	http://repository.its.ac.id/id/eprint/131826

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