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All Journal METAL : Jurnal Sistem Mekanik dan Termal Journal Serambi Engineering (JSE)
Muhammad Fadhillah Ansyari
Politeknik STMI Jakarta
Automotive Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Kinetic Modeling of Methylcyclohexane Dehydrogenation Reaction for Toluene Production in the Polymer Industry Muhammad Fadhillah Ansyari; Fitria Ika Aryanti
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Toluene, also known as methylbenzene, plays an important role in various industries, particularly the polymer industry where it is used as a solvent, an adhesive in resins and an additive in rubber and cosmetic products. However, the current production of toluene in Indonesia is insufficient to meet the growing demand, particularly in the polymer sector, prompting the exploration of alternative production methods. This work investigates the production of toluene through the dehydrogenation of methylcyclohexane (MCH) using a Pt/Al₂O₃ catalyst, a process that also generates hydrogen, contributing to clean energy initiatives. The research focuses on identifying the optimal kinetic model for the dehydrogenation reaction, taking into account reactor design and catalyst performance. Four kinetic models were analysed using Polymath software, with the second model highlighting methylcyclohexane adsorption as the key factor and showing the best agreement with experimental data. The results indicate that toluene production can be improved using a fixed bed reactor and Pt/Al₂O₃ catalyst, with surface reactions as the rate-limiting step, offering promising prospects for meeting the needs of the polymer industry.
Tailored Polyurethane Composite Foams for Automotive and Biomedical Applications: Influence of Polyol–Isocyanate Ratios on Density, Texture, and Formation Time Muhammad Fadhillah Ansyari; Yovi Utami
METAL: Jurnal Sistem Mekanik dan Termal Vol. 9 No. 2 (2025): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.9.2.89-101.2025

Abstract

Polyurethane (PU) composite foams have gained significant attention in both the automotive and biomedical industries due to their lightweight structure, tunable mechanical properties, and excellent thermal and acoustic insulation. This study examines how varying the polyol–isocyanate ratio (1:1, 2:3, and 3:2) influences the physical characteristics of PU foams, particularly density, texture, and formation time. Using a batch mixing and molding process, three formulations were synthesized and evaluated. The foam with a 2:3 ratio produced a rigid structure (density: 0.045 g/cm³), suitable for automotive applications such as vibration dampening and structural interior panels. In contrast, the 3:2 ratio resulted in a soft, flexible foam (density: 0.047 g/cm³), which may be applicable in biomedical cushioning, prosthetics, or pressure-relieving supports. The 1:1 ratio generated a semi-rigid foam with the lowest density (0.032 g/cm³), indicating potential use in hybrid comfort–support systems. Formation times ranged from 7.18 to 15 minutes. The results demonstrate that the mechanical and physical properties of PU foams can be customized by adjusting the reactant ratios, enabling their application across multiple sectors. This study provides a foundational understanding of formulation–property relationships for PU composites and supports their integration into energy-efficient vehicles and human-centered biomedical devices.
Co-Authors Fitria Ika Aryanti Yovi Utami