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All Journal PROSIDING SEMINAR KIMIA JURNAL ATOMIK Akta Kimia Indonesia
RR Dirgarini Julia Nurlianti Subagyono
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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Studi Komposisi Kimia Produk Pirolisis Kilat Off-grade Rubber dengan Katalis Ni/Ga-SBA-15 Three Uli Sevilla Sitohang; RR Dirgarini Julia Nurlianti Subagyono; Veliyana Londong Allo
Akta Kimia Indonesia Vol. 10 No. 2 (2025): Desember 2025
Publisher : Chemistry Department

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/aki.v10i2.8912

Abstract

This study investigated the chemical composition of flash pyrolysis products from off-grade rubber, a low-quality byproduct of natural rubber processing, with and without Ni/Ga-SBA-15 catalyst. The flash pyrolysis was conducted under helium using pyrolysis–Gas Chromatography/Mass Spectrometry (Py-GC/MS) at 200 °C and 300 °C. The off-grade rubber contained 23.62 ± 2.26 wt. % moisture and 11.24 ± 1.09 wt. % ash. FTIR analysis revealed the functional groups in the rubber sample, including =C–H, -CH₂, C=O, C=C, -CH₃, C–O–C, and C–O. Py-GC/MS identified major pyrolysis products at both temperatures, before and after catalyst addition, as terpenoid derivatives, fatty acid derivatives, and aromatic and non-aromatic hydrocarbons. At 200 °C, the catalyst reduced the percent area of n-hexadecanoic acid while increasing the percent area of squalene, indicating enhanced deoxygenation activity. At 300 °C, the catalyst increased the percent areas of d-limonene, cyclohexane derivatives, and azulene. Overall, Ni/Ga-SBA-15 promoted the formation of terpenoid derivatives, while reducing the production of less desirable fatty acid derivatives. These results demonstrate that catalytic flash pyrolysis can modify product distribution from off-grade rubber.
Co-Authors Agustina Tri Putri Sitinjak Allo, Veliyana Londong Ari Susandy Sanjaya, Ari Susandy Helbianurramdan Helbianurramdan Miranda Miranda Mohd. Asyraf Kassim Mutiara Pertiwi Nana Lestari Noor Afdaliah Noor Hindryawati Rahmat Gunawan Rudy Agung Nugroho Siti Sarah Sri Astika Putri Three Uli Sevilla Sitohang Wardina Masdalifa