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Arief Budiman
Chemical Engineering Department Universitas Gadjah Mada
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Journal : Bulletin of Chemical Reaction Engineering

 1 
Experimental and Kinetic Modeling of Galactose Valorization to Levulinic Acid Retno Ringgani; Muhammad Mufti Azis; Rochmadi Rochmadi; Arief Budiman
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 2 Year 2022 (June 2022)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.2.14032.451-465

Abstract

Levulinic acid, a versatile chemical building block, was derived from C6-sugar galactose using sulfuric acid as the catalyst. Galactose is monosaccharide of polysaccharides constituent that is mostly contained in third generation biomass, macro-microalgae. It currently receives high attention to be a source of renewable feedstock. The effect of temperature, catalyst concentration and initial substrate loadings were studied for 60 min, in the temperature range of 150–190 °C, acid concentration of 0.25–0.75 M and initial substrate loading of 0.05–0.25 M. The highest levulinic acid yield of 40.08 wt% was achieved under the following conditions: 0.05 M galactose, 0.75 M acid concentration, 170 °C temperature, and 40 min reaction time. The kinetic model was developed by first order pseudo-irreversible reaction. The results showed that the proposed model could capture the experimental data well. These results suggested that galactose, derived from macro- and micro-algae, can potentially be converted and applied for platform chemicals. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
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).
Co-Authors . Widayat Abdul Ghofur Abdul Rohman Achmad Halim Purbohandono Achmad Rizky Fazar Achmad Roesyadi Adidtya Perdana, Adidtya Afkarina, Izzeh Aflah, Arief agung setiawan Agus Aktawan, Agus Agus Suyono, Eko Ahda Hafidz, Anggaditya Ahmad Agus Setiawan Ahmad Tawfiequrrahman Yuliansyah Aini, Apsari Puspita Akly, Faisal Akmal, M. Alfarisi, Muhammad Alisharsa, Muhammad Dafa Alita Lelyana Alwiyah Alwiyah Amelia, Ria Anastasia Ary Noviyanti Andhika Puspito Nugroho Andini Putri, Egydia Ardy Aprilian Anwar Ari Usman, Ari Arif Yulianto Widi Kurniawan Arifin, A. Zainul Arum Wulandari, Hesti Ashari, Maajid Surya Putra Astiti, Adam Avido Yuliestyan Aydogmus, Ilkay Baehaqi Boy Arief Fachri Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto, Budhijanto Budi Budi Budi BUDI SETIADI DARYONO Burhanto, Burhanto Cahyono, Rochim Bakti Chafid Fandeli Cindiati, Maya Damaiyanti, Mukhripah Damayanti, Fera Daniar Rianawati David David Dedi Irwan Defiani Putri Denanti Demmanggasa, Yultan Dewayanto , Nugroho Dewi, RD. D. Lokita Pramesti Dewi, Rike Tri Kumala Diana Diana Diananto Prihandoko Diansyah, T.M Diena Yudiarti Dwi Pratiwi Edy Yulianto Eko Agus Suyono Eko Agus Suyono Ely Afridiana Kuncoro Eni Budiyati Erfianti, Tia Erna Ferrinadewi Fachri, Barany Febrian, Wenny Desty Fitri Annisah lubis, Yessi Fitri Natalia Fitri, Linda Dwi Novial Galang Fitrianto, Wisesa Ghifari, Muhmmad Nurshandy Al Gusti, Alexander Kenzy Pinaring H Hadiyanto H.M. Edwar Juliartha Handayani, Fitriyani Yetti Handayani, Septy Handoko, Divi Harahap, Herlina Harlina Putri, Lily Hary Sulistyo Heri Heriyanto Heri Rustamaji Herti Utami Humaidi, Achmad Husaini, M. Hutasuhut, Muhammad Rizki Hamdani Ikhwan Faisal, Ikhwan Ilham Mufandi Ilham Mufandi Imas Komariah, Imas Imran Lubis Indriana Lestari Irgie, Rafi Irwan Setyaji ISKANDAR Istiqomah, Aisa Fadhilatul Jarman Arroisi Joko Waluyo Karilanata, Khalid Erlangga Khalidy, Furqan Kinanti, Isnatul Agil Kurnianto, Dedy Kurniawan, Aries Taufiq Kurniawan, Yulius Kusmeri, Kusmeri Kustiawan, Unggul Kusuma, Melvin Aryadika Laila Refiana Said Lakilaki, Eogenie Laksana, Rio Dhani Lestari, Dwi Indah Lestari, Yuyun Dwi Lucia Tri Suwanti, Lucia Tri M Iqbal Maulana Ginting Maggandari, Revata Mahfuddin, Rohmat Makalew, Paulina Vega Mardiah Mardiah Mardyansah, Deviko Margaretha Praba Aulia Maria Theresia Sri Budiastuti Martomo Setyawan Marwa, Annisa Masduki Maswani Maswani, Maswani Mien Rukmini, Mien Minny Elisa Yanggah Mitha Puspitasari Mochammad Donny Koerniawan Muhammad Mufti Azis Muhammad Rivai Muhammad Saifi Muhammad Yudhi Rezaldi, Muhammad Yudhi Muis Murtadho Munadi, Yudhi Muzakar Isa Nabila Fauzi Nadza, Reza Nainggolan, Theodora MV Natalia, Fitri Naufalina, Fariha E Ningtiyas, Sevia Dewi Norjannah, Norjannah Nugroho Dewayanto, Nugroho Nur Wulan, Nur Nurafifah, Istini Nuril Huda Nurtiar, Haryo Oktafia, Linda Ortiz, Edixon Daniel Pandjaitan, Manahan Budiarto Panut Mulyono Pauzi, Riky Pereira, Julio Prabang Setyono Pradana, Yano Surya Prakasa, Razaan Mauli Al-Farizi Prasakti, Laras Prasetyo, Ridwan Budi Prima Astuti Handayani Putri Restu Dewati Putri, Renata Adaranyssa Egistha Qonita Maghfiroh, Khusnul R Rochmadi Rachman, Mohammad Yudy Rachmat Aulia, Rachmat Rachmawan Budiarto Ratna Dewi Kusumaningtyas Rediono, Erwin Regita, Nira C. Ridwan Budi Prasetyo Ringgani, Retno Riski, Sari Kurnia Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rojuaniah Rojuaniah Roto Roto Rozy, Ahmad Rusmiati, Elis Rusniati Rusniati Ryan Sadewo, Brilian S Sutijan Sadewo , Brilian Ryan Sarudin Sarudin, Sarudin Septiyaningsih Septiyaningsih Setianto, Diki Putra Setiantoro, Arief Eko Sholeh, Aminuddin Sihotang, Ferryanto Simanungkalit, Muhammad Iqbal Arghribi Sinaga, Jepriando Siregar, Muhammad Ramulia Siregar, Yosua Arihta R. Sada Siti Ferniah, Rejeki Siti Jamilatun Siti Jamilatun Siti Khadijah siti mudrikah Siti Soekiswati Siti Sundari Sitompul, Siti Cholijah Solly Aryza Sri Dwi Astuti Al Noor Sucahyati, Diarany Sugeng, Joko Suhendra Suhendra Suhendra Suhendra Sulistyawati Sulistyawati Sumitro Sumitro Suriati, Suriati Suryo Purwono Susanto, Try Sutijan Sutijan Sutijan Sutijan Sutijan Suyono, Dr. Eko Agus Syahputra, Tengku Tantri Yanuar Rahmat Syah Tarigan, Duncan Dancin Tiara Radinska Deanda Tommy Munaf Tommy, Tommy Topani, Ilham Tri Wahyu Setyaningrum, Tri Wahyu Ulfah Juniarti Siregar Ummul Khair Usman, Arie Utami, Dewi Ayu Anggraeni Vendy, Vicky Verawati, Linda Wahyu Wilopo Wahyudi Budi Sediawan Widodo, Condro widyastuti, ira Wijaya, R. Muh Syah Arief Atmaja Wiyono, Edi Wusana Agung Wibowo, Wusana Agung Yessi Fitri Annisah Lubis Yosa Fiandra Yulius Hari Yunita Sari Yuslainiwati, Yuslainiwati