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All Journal Jurnal Reviu Akuntansi dan Keuangan JURNAL ECONOMIA Jurnal Akuntansi & Auditing Indonesia Jurnal Energi Dan Manufaktur International Journal of Renewable Energy Development Jurnal Bisnis dan Manajemen Jurnal Keuangan dan Perbankan Rekayasa Mesin Jurnal Akuntansi Multiparadigma ROTOR: JURNAL ILMIAH TEKNIK MESIN International Conferences SDGs 2030 Challenges and Solutions JCES (Journal of Character Education Society) SENTIA 2016 Conference on Innovation and Application of Science and Technology (CIASTECH) ASEAN Journal of Chemical Engineering The Indonesian Journal of Accounting Research Scientific Journal of Mechanical Engineering Kinematika Indonesian Journal of Electrical Engineering and Computer Science TECHNO-SOCIO EKONOMIKA International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) Jurnal Akuntansi Manado (JAIM) International Journal of Renewable Energy Development
Nurkholis Hamidi
Departement Of Mechanical Engineering Brawijaya University, Malang
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry 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 Social Sciences Other

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PYROLYSIS OF CORN COB BIOMASS TOWARD GASEOUS PRODUCTS ON SMALL CAPACITY REACTOR Yuliansyah, Fisal; Hamidi, Nurkholis; Sasongko, Mega Nur
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 1 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.01.9

Abstract

Corn waste is the result of agricultural production that can be further utilized and get additional economic for the community. Waste Corn cab is one of Indonesia abundant biomass apart from. The utilization of biomass by implementing pyrolysis process can be viable solution. This study aims to observe the determination corn cab pyrolysis using HCL-bentonite activation and without bentonite towards syngas product (CH4-H2-CO-CO2). Updraft reactor was utilized for 30 minutes pyrolysis process. We used MQ4, MQ8, MQ7 coupled with Arduino UNO for measuring CH4, H2, CO2 and CO in ppm unit. Compared without bentonite, the result showed that methane (CH4) gas production increased. In addition, we found also that hydrogen (H2) gas increased respectively. Not mention, the content of CO increased.
THERMOGRAVIMETRIC ANALYSIS OF PULVERIZED RICE HUSK WASTE CATALYTIC COMBUSTION WITH NATURAL ZEOLIT Hamidi, Nurkholis; Yuliati, Lilis; Purnami, Purnami; Faiz, Naufal Muhammad
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 2 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.02.7

Abstract

Rice husk is a type of agricultural waste that generated from rice production activities. The number continues to increase in line with the increasing food needs of the people in Indonesia. This study aims to determine the effect of the addition of natural zeolite as a catalyst and to determine the effect of natural zeolite mass percentage variation in the mixture on rice husk waste catalytic combustion by using the thermo gravimetric analysis method. The results of this study show that there is an effect of adding natural zeolite catalysts with the mass percentage of natural zeolite variations on the combustion characteristics and activation energy of each mixture. Increasing the mass percentage of natural zeolite catalysts can affect the reaction process become faster and minimize the effort required, but it was found that if the amount of natural zeolite catalyst is too much, it only adds to the heating load which causes slower reaction. The mixture of rice husks with 10% natural zeolite catalyst is the most optimal mixture because it has the lowest required activation energy value and the combustion reaction phases are achieved at a lower temperature than 5% and 15% mass percentage variations.
Pemanfaatan sifat Wettability Minyak Nabati untuk meningkatkan Cleanability pada kasus Fouling Rizza, Muhammad Akhlis; Wardana, I Nyoman Gede; Hamidi, Nurkholis; Wijayanti, Widya
Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) 2017: Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (243.781 KB)

Abstract

Fouling menjadi permsalahan pada proses produksi di suatu industri, terutama industri yang memiliki prosesperpindahan panas. Fouling dapat mengurangi perpindahan panas yang terjadi. Oleh karena itu terjadinyafouling harus diatasi dengan cleaning yang cepat. Untuk mempercepat proses cleaning, terutama pada foulingdengan material droplet minyak nabati dapat dilakukan dengan memanfaatkan sifat wettability. Sifatwettability dapat diatur dengan mengatur temperatur pada droplet. Tujuan analisis ini adalah mengetahuifaktor-faktor yang berpengaruh pada wettability, sehingga dapat dipakai untuk memudahkan proses cleaning. Berdasarkan analisis, diperoleh kesimpulan bahwa wettability dipengaruhi oleh temperatur minyak nabatiserta kerataan permukaan substrate-nya.
THERMODYNAMIC ANALYSIS OF ALKALINE ELECTROLYSIS UNDER VISIBLE LIGHT ILLUMINATION: COMPARATIVE ASSESSMENT OF GREEN AND BLUE LED EXPOSURE Santoso, Mardi; Ahmad, Anton Royanto; Sinurat, David Fernando; Hamidi, Nurkholis; Purnami
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

This study explores the thermodynamic behavior of alkaline electrolysis under visible light illumination, focusing on the effects of green and blue wavelengths in the absence of chemical additives. Through a series of controlled experiments, temperature evolution, energy input, and thermal efficiency were analyzed over a 20-minute electrolysis period. Results show that both green and blue light enhance the system's thermal response compared to dark (control) conditions, with blue light achieving the highest temperature rise and energy conversion efficiency. Arrhenius analysis revealed a clear temperature dependence of the rate constant, and strong correlations were observed between temperature rise (ΔT), heat energy (Q), and system efficiency. These findings suggest that visible light particularly blue light can significantly improve the thermal dynamics of electrolysis systems, paving the way for low-cost, passive solar-assisted hydrogen production.
ANALYSIS OF THE EFFECT OF TEMPERATURE ON THE PHYSICAL PROPERTIES OF CATALYTIC CRACKING OF COCONUT OIL MICROEMULSION BIODIESEL Paepenan, Semuel Poumer; Hamidi, Nurkholis; Purnami, Purnami; Anggara, Teuku
International Journal of Mechanical Engineering Technologies and Applications Vol. 7 No. 1 (2026): January - June
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//MECHTA.2026.007.01.5

Abstract

This study aims to analyze the effect of catalytic cracking temperature variation on the physical properties of coconut oil-based microemulsion biodiesel using a zeolite catalyst. The microemulsion biodiesel was produced by mixing coconut oil, ethanol, and butanol, followed by catalytic cracking treatment at temperatures of 50°C, 75°C, 95°C, 125°C, and 150°C. The key parameters observed included viscosity, density, flash point, calorific value, and cetane number. The results showed that increasing the catalytic cracking temperature led to a decrease in viscosity from 15.24 stokes in its initial state to 10.48 stokes at 150°C, indicating the breakdown of heavy molecules into lighter fractions. Density fluctuated, reaching its highest value of 0.879 g/cm³ at 75°C before stabilizing at approximately 0.878 g/cm³ at 150°C. The flash point exhibited a non-linear trend, peaking at 30.5°C at 75°C before decreasing again. The calorific value increased significantly from 8769.70 cal/gram to 9342.93 cal/gram at 150°C, demonstrating an enhancement in the energy content of the biodiesel. Meanwhile, the cetane number was recorded at 75 at both 95°C and 150°C, indicating good combustion quality. Based on these findings, the optimal catalytic cracking temperature was determined to be 150°C, yielding biodiesel with lower viscosity, higher calorific value, and improved combustion performance. This study demonstrates that catalytic cracking can enhance the quality of microemulsion biodiesel, with further optimization potential for industrial-scale applications.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Ghofar Akhlis Rizza, Muhammad Alamsah, Azwar Alfonsus Jantong Amanah Hijriah Ana Pratiwi Anggara, Teuku ANGGI FIRMANSYAH Anindito Purnowidodo Anton Royanto Ahmad Ari Wahjudi Aries Boedi Setiawan Aris Kurniawan Aris Subagiyo Astrada Astrada Bambang Subroto Candra Trimandoko, Candra Dadang Hermawan Dedy Nataniel Ully Denny Widhiyanuriyawan Dian Dinanti Djoko Wahyudi Djoko Wahyudi Eko Ganis Sukoharsono Eko Siswanto Endang Mardiati Erwin Saraswati Faiz, Naufal Muhammad Farid Majedi Farid Majedi, Farid Fauzan Baananto Fisal Yuliansyah Fransisca Gayuh Utami Dewi Fransiska Iing Mariandini Gatot Soebiyakto Gugus Irianto Gunawan Prayitno Habibulfalah, Endi Hadi Saroso Hadi Saroso Handono Sasmito I Nyoman Gede Wardana I.N.G. Wardana I.N.G. Wardana I.N.G. Wardana I.N.G. Wardana I.N.G. Wardana I.N.G.Wardana I.N.G.Wardana Ibadurrohman, Ibrahim Ahmad Ilyas Sofana ING Wardana Kusumaningsih, Haslinda Lilik Purwanti Lilis Yuliati Lilis Yuliati Made Aristia Prayudi Marali, Aryati Muhaymin Mardi Santoso Maulana , Syahrizal Mega Nur Sasongko Moch. Syamsul Ma'arif Moon, Park Jae Muhamad Bula Muhammad Satya Adhitama Munawir Munawir NadaFajar Nurmani'ah Widiarti Nindya Sari Nur Rachman Supadmana Muda Nurul Fachriyah Paepenan, Semuel Poumer Pragiwaka, Rafif Ezrha Praswanto, Djoko Hari Princilvanno Andreas Naukoko Pudya Heryana Purbo Suwandono Purnami Purnami Purnami Ray Dewi Redi Bintarto Redi Bintarto, Redi Roekhudin, Roekhudin Rudianto Raharjo Rudy Soenoko Rudy Soenoko Sabila, Adriazka Fasa Saputro, Nurhadi Sari, Martina Puspita Sepriyatno, Riswan Sinurat, David Fernando Slamet Wahyudi Sofana, Ilyas Sudjito Soeparman Sugiarto Sugiarto Suluh Elman Swara Suroso, Yosephine Diajeng Janur Prasasti, As’ad Munawir, Suryaningrat, Muhammad Sutrisno T Teguh Dwi Widodo Trismawati Trismawati Widya Wijayanti widya wijayanti Widya Wijayanti Wignyanto Wignyanto Wijayanto, Vera Dwi Wijono Yenni Mangoting Yusuf Hendrawan