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All Journal Transmisi Journal of Mechanical Engineering Science and Technology Journal of Research and Technology JMM (Jurnal Masyarakat Mandiri) KACANEGARA Jurnal Pengabdian pada Masyarakat JAST : Jurnal Aplikasi Sains dan Teknologi Jurnal ABDINUS : Jurnal Pengabdian Nusantara G-Tech : Jurnal Teknologi Terapan Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Jurnal Pengabdian Masyarakat Khatulistiwa Automotive Experiences Indonesian Community Journal Journal of Mechanical Engineering, Science, and Innovation International Journal of Innovation in Mechanical Engineering and Advanced Materials Journal Of Industrial Engineering & Technology Innovation RING Mechanical Engineering KOPEMAS
Yazirin, Cepi
Universitas Islam Malang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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PENGARUH MEDIA PENDINGIN TERHADAP KEKERASAN BAJA KARBON: STUDI EKSPERIMENTAL PADA VARIASI QUENCHING MEDIA Andrianto, Sis Nanda Kus; Andromeda, Tata; Sasongko, Muhammad Ilman Nur; Yazirin, Cepi
Journal of Industrial Engineering & Technology Innovation Vol. 3 No. 2 (2025): Journal of Industrial Engineering & Technology
Publisher : LENVARI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61105/jieti.v3i2.360

Abstract

This research analyzes the effect of cooling media types on the hardness of carbon steel through the quenching process using water, oil, and air. Variations of cooling media are selected based on differences in cooling rates that theoretically affect the transformation of microstructures, especially the formation of martensite. The research method is experimental by heating carbon steel to 850 °C, followed by quenching on three different media. The Rockwell C hardness test shows a significant difference between the three media. Water-cooled samples have the highest hardness value, followed by oil, while air cooling produces the lowest hardness. This result is in line with the cooling rate theory and phase transformation kinetics (TTT/CCT diagram). Research findings contribute to the optimization of the heat treatment process in the manufacturing industry to choose a cooling medium that is suitable for the strength and toughness of the components.
Catalytic Pyrolysis of Plastic Waste using Red Mud and Limestone: Pyrolytic Oil Production and Ignition characteristics Ena Marlina; Akhmad Faruq Alhikami; Siti Asmaniyah Mardiyani; Trismawati Trismawati; Cepi Yazirin
Automotive Experiences Vol. 7 No. 3 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.12830

Abstract

This study investigated the catalytic pyrolysis of polypropylene (PP) and low-density polyethylene (LDPE) using 10 wt.% red mud and 10 wt.% limestone catalysts in a batch reactor. The process was conducted at an operating temperature of 350°C with retention times of 30, 60, and 90 minutes. The effects of adding red mud and limestone catalysts on the yields of liquid, solid, and gas pyrolysis products were analyzed. The pyrolytic oil was further evaluated using droplet evaporation measurements, equipped with a K-type thermocouple and a CCD camera to monitor droplet evolution within an atmospheric chamber. The addition of catalysts enhanced the liquid product yield while reducing the solid yield. The catalytic pyrolysis successfully facilitated the isomerization of plastic polymers, breaking the carbon chains of PP with 10 wt.% red mud. Olefin content increased by up to 7.3% for both 10 wt.% red mud and 10 wt.% limestone. Furthermore, the evaporation rate constant of the catalytic pyrolysis oils improved by up to 8.3%. This study aims to provide new insights into utilizing local waste materials to enhance the quality of pyrolytic plastic products.
The Role of Heterogeneous Catalyst Transesterification in Single Droplet Combustion of Soybean Oil Based Biodiesel Haidar Hanief; Arya Radya Guntur Pamungkas; Mitsuhisa Ichiyanagi; Willyanto Anggono; Cepi Yazirin; Muhammad Akhlis Rizza; Ena Marlina
Automotive Experiences Vol. 8 No. 3 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.15027

Abstract

The consumption of petroleum fuel in Indonesia is increasing, makes the globe climate change a lot. Thus, requiring a renewable energy alternative source such as biodiesel. This study analyzed the single droplet combustion characteristics of soybean oil-based biodiesel produced via transesterification using two heterogeneous catalysts: papaya leaf (PL) and papaya leaf combined with animal bone (PLAB). For comparison, petroleum diesel fuel also tested. Results show that catalyst origin significantly influences combustion behavior. PL exhibited the longest droplet lifetime 7,135 mm/s2 and the highest peak temperature (546 °C), while PLAB showed shorter droplet lifetime 5,001 s/mm2and a lower peak temperature (467 °C), closer to petroleum diesel (4,081 s/mm2 and 254 °C), respectively). In terms of ignition delay, petroleum diesel ignited fastest (3,528 s/mm2), followed by PLAB (4,837 s/mm2) and PL (0,612 s/mm2). The combustion behavior of PLAB is correlated with its higher FAME purity (98%) and methyl linoleate content (43.69%), as reflected by the reduced droplet lifetime. This suggests that the catalyst primarily improves biodiesel quality via enhanced transesterification efficiency, which in turn affects combustion characteristics.
Co-Authors A. Muhammad Ach.Iqmal Herdiansyah Agustina Ainurosida Ahmad Fariz Ahmad Jauhari Zuhair Aisyaturradiah Aisyaturradiah Aisyaturradiah, Aisyaturradiah Akhmad Faruq Alhikami Al-Fattah, Muhammad Kurnia Gusti Alief Muhammad Aminulloh Ibrahim Andhinilarasati Andhinilarasati Andrianto, Sis Nanda Kus Andriyani, Narulita Andromeda, Tata Anitasari, Silvi Anjaliati, Lesi Apriiliyanto, Tito Dwi Arimurti, Ajeng Ariqy, Mohamad Alwan Al Arya Radya Guntur Pamungkas Awin Uminatul Chusna Aziz, Achmad Ridwan Abdul Azizah, Wenny Nur Azizah, Yasmin Nur Balilatul Zuhrah Bambang Dwi Sulo Basjir, Mochammad Basyar, Moch. Khoiril Cahyani, Fitria Chotibul Umam Assalafy Chusna, Awin Uminatul D. I. Tsamroh Dafa Agmi Pradana Damanhuri, Noor Fadhilah Dewi Izzatus Tsamroh Dewi Puspitasari Dika, Arifin Mahar Dika, Johan Wayan Ela Mawarni Ena Marlina Fadhil, Sani Fadillah, Rahmad Fahil Fadillah, Rahmat Fahil Farida, Mita Lailatul Ferra Rossa Yolandya Fikry Auzarillah Ghayatri, Niken Arum Hadi Nasbey Haidar Hanief Haris Muhamad Yusuf Iftita Khumairo Ilmiahadi, Bahrul Ismawati Ismawati Ismawati Ismawati Isnaini Roicha Mudyanti J. W. Dika Jamaludin Kafi Junaidi Junaidi Kresna Agung Yudhistira Kusuma, Tris Tiyo Arinda Lailia, Radika Putri Lesi Anjaliati Lina Mutmainnah M. Iqbal Reza Shah Pahlevi M. Kastalani M. Yuliardiansyah Akbar W. Maghfiroh, Achmad Huzein Mahdi, Riadlus Al Mahmudah, Wafiq Rochayatul Mardiani, Eki Margianto Margianto Margianto Maulida, Alfita Mitsuhisa Ichiyanagi Moch. Khoiril Basyar Mochammad Handi Mudawamah Mudawamah Muhamad Fatikul Arif Muhammad Akhlis Rizza Muhammad Email Ramadhan Muhammad Ilman Nur Sasongko Muhammad Iqbal Pratama Narulita Andriyani Naufal, Maulana Igo Athief Nur Robbi Nurul Humaidah Nurul Humaidah Oktriza Melfazen Pradana, Dafa Agmi Prasetiyo, Ardianto Prawiro, Bimo Anggoro Prayoga, Farhan Ardi Priyagung Hartono Pungky Eka Setyawan Putra, Agus Dwi Putri, Vera Eselia Raden Nabil Mumtazul Mubarok Raharjo, Artono Rahma Nur Faizah Rahmilia, Rifdah Fernidah Rr. Poppy Puspitasari Rusdijanto Rusdijanto, Rusdijanto Santi, Fitriana Sari, Mita Rovita Sholehudin, Muhammad Arsono Siti Asmaniyah Mardiyani Siti Nur Azizah, Siti Nur Solihin Sri Harningsih Syaaban S., Abiem Treza Ghassani Trismawati Trismawati Tsamroh, Dewi ‘Izzatus Unung Lesmanah Unung Lesmanah Wafiq Rochayatul Mahmudah Wahid, Hadi Muhammad Anwar Willyanto Anggono Zamroji, Ahmad Zidan Septian Adisurya Zuhair, Ahmad Jauhari Zuhrah, Balilatul