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All Journal International Journal of Renewable Energy Development Transmisi: Jurnal Ilmiah Teknik Elektro Jurnal Sains Materi Indonesia Majalah Kulit, Karet, dan Plastik Jurnal Penelitian Karet Indonesian Journal of Chemistry GANDRUNG: Jurnal Pengabdian Kepada Masyarakat Jurnal Abdiraja International Journal of Social Service and Research Makara Journal of Technology Innovative: Journal Of Social Science Research Bulletin of Chemical Reaction Engineering & Catalysis
Rochmadi Rochmadi
Gadjah Mada University
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Journal : Bulletin of Chemical Reaction Engineering

 1 
Synthesis of Polyesters from AB Tung Oil-based Polyol Monomers Through Step-growth Polymerization Reactions Budiyati, Eni; Hartini, Hartini; Rochmadi, Rochmadi; Budiman, Arief; Budhijanto, Budhijanto
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 2 Year 2025 (August 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20338

Abstract

In this study, polyesters synthesized from AB Tung oil-based polyols (TOBPs) monomers via step-growth polymerization reactions. TOBPs are polyols made from Tung oil through a series of hydroxylation and epoxidation procedures. They have hydroxyl (OH) and carboxylic (COOH) functional groups. The polymerization was performed in a three-necked round-bottomed flask (250 mL) equipped with a magnetic stirrer, thermometer, and condenser. It is placed in an oil bath to maintain the reaction temperature. The generated moisture was collected using a vacuum pump. In the meantime, oxygen is being expelled from the reactor by nitrogen. The temperature and stirring speed were kept constant for 6 hours throughout the operation. According to the experiment, 150°C was the ideal temperature for polyesterification. The reaction rate constant rose by 4.73 to 19.99% with the addition of the p-TSA catalyst. The [COOH] and [OH] models were nearly identical to the experimental results, demonstrating the viability of the proposed kinetic model. According to the calculation's findings, polymerization without a catalyst yielded activation energies (Ea) and collision factors (A) of 27.2215 kJ/mol and 16.2965 g.mmol-1.min-1, respectively. Then, polymerization with catalyst decreased Ea and A values, which were around 26.4681 kJ/mol and 14.6746 g.mmol-1.min-1. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Modification of HZSM-5 with Phosphotungstate, Silver, and Cobalt to Enhance Catalytic Reaction of Bioethanol to Bioethylene Risnawati, Dhea Atika; Pradana, Nova Yoga; Rochmadi, Rochmadi; Prasetyo, Imam; Saputra, Daffa Dewa; Pranamuda, Hardaning; Tandio, Sugianto; Ariyanto, Teguh
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026) (Issue in Progress)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20604

Abstract

Developing an optimal catalyst formulation is a critical challenge in expanding sustainable ethylene production and utilization as a chemical intermediate product. Metal oxide impregnation (silver nitrate (AgNO3), cobalt nitrate (Co(NO3)2), and phosphotungstic acid (H3PW12O40)) was used to enhance the catalytic performance of HZSM-5 by increasing active sites and acidity. The preparation of the catalyst was performed by the impregnation of various metals and amounts of loading particles inside the pores of HZSM-5. The particles were impregnated by incipient wetness impregnation and followed by calcination to obtain Ag/HZSM-5, Co/HZSM-5, and W/HZSM-5 catalysts. Characterization techniques, including N2 adsorption-desorption, SEM, and XRD, were used to analyze the catalyst properties. Catalytic performance was evaluated in a packed-bed reactor under varying reaction conditions at WHSV 1.8 h-1. The aim of this research is to identify optimal catalyst formulations that exhibit superior activity in both conversion and selectivity towards ethylene production. Modified HZSM-5 catalysts incorporating Ag, Co, and W exhibited enhanced catalytic performance for bioethanol dehydration to bioethylene, attributed to optimized acidic sites, pore structure, and metal synergy. The 1%W/HZSM-5 catalyst demonstrated superior ethylene conversion (98.2%) and selectivity (99.88%) at 300 ℃. Increasing tungsten loading up to 2% impacted the conversion of bioethanol. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Abdul Syakur Abu Hasan Achmad Noerkhaerin Putra Aminuyati Anggoro, Santoso Dwi Arief Budiman Baehaqi Bambang Sutopo Budhijanto Budhijanto, Budhijanto Cahyono, Rochim Bakti Eli Rohaeti Eni Budiyati Gatot Jariono Hamzah Berahim Hardaning Pranamuda Hary Sulistyo Henry Prastanto, Henry Imam Prasetyo Indri Indri Israhadi, Evita Isretno Kautsar Rizqi Nursyifa, Kautsar Rizqi Margaretha Praba Aulia Muhammad Amiruddin Muhammad Mufti Azis Mujiyono Mujiyono Muslikhin Hidayat Nurhidayat Nurhidayat Pradana, Nova Yoga Prima Astuti Handayani Rahayu, Yayuk Nur Ratna Dewi Kusumaningtyas Risnawati, Dhea Atika Saputra, Daffa Dewa Sarjiya Siti Jamilatun Sudarmanto, Eko Sudrajat, Adam Suharto Honggokusumo Suryo Purwono Tandio, Sugianto Teguh Ariyanto Tulloh, Rahma Winarko AP Wusana Agung Wibowo, Wusana Agung