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Harwin Saptoadi
Department Of Mechanical And Industrial Engineering, Gadjah Mada University, Jl. Grafika 2, Yogyakarta
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The Effect of Temperature Variation and Absorber Type on the Pyrolysis of Sawdust Using Microwaves Saputro, Muhammad Arief; Saptoadi, Harwin; Putra, Robertus Dhimas Dhewangga
Journal of Renewable Energy, Electrical, and Computer Engineering Vol. 5 No. 2 (2025): September 2025
Publisher : Institute for Research and Community Service (LPPM), Universitas Malikussaleh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jreece.v5i2.19543

Abstract

Biomass is a renewable and environmentally friendly energy source. However, its utilization is often inefficient, such as in direct combustion and biological processes. Pyrolysis, a method of heating biomass without oxygen, can enhance the value of biomass by producing gas, oil, and char. Microwave technology makes the pyrolysis process more efficient. This study varied the pyrolysis temperatures (350°C, 400°C, 450°C, 500°C) and used KOH and SiC as varied absorbers. KOH was chosen because it contains O and H elements that help absorb microwaves, while SiC is effective in improving heating efficiency. The results showed that pyrolysis at 350°C produced the highest biochar yield of 59.3% of the biomass weight. The highest bio-oil yield, 27.7%, was obtained at 400°C.Pyrolysis without an absorber demonstrated that sawdust cannot absorb microwaves effectively, as the temperature only reached around 200°C, which is insufficient for pyrolysis. SiC increased the temperature of the sawdust (between 200°C - 330°C) earlier than KOH. However, KOH led to higher bio-oil production than SiC. The findings suggest that absorber type and pyrolysis temperature significantly influence the efficiency and product distribution. Microwave-assisted pyrolysis with absorbers offers a promising method for converting biomass into valuable energy products, highlighting its potential for further development.
Co-Authors Azarya, Eblin Alle Bayu Megaprastio Bisrul Hapis Tambunan, Bisrul Hapis Dwi Aries Himawanto Dwi Aries Himawanto Fauzun Fauzun I Indarto Indarto, I Kunio Yoshikawa Kurniawan, Stephanus Danny Maulana Wahyu Ayatullah Mochamad Syamsiro Muhammad Arief Saputro Muhammad Arif Wibisono, Muhammad Arif Musabbikhah Musabbikhah Muslikhin Hidayat Nashrul Chanief Hidayat Nazarrudin, Rizal Nosal Nugroho Pratama Nosal Nugroho Pratama Novi Caroko Nugraha, Maulana Gilar Nur Aklis P. C. Sumardi, P. C. Putra, Robertus Dhimas Dhewangga Putra, Robertus Dimas Dewangga R. Dhimas Dhewangga P R. DHIMAS DHEWANGGA P, R. DHIMAS Shuo Cheng Siti Syamsiah Subarmono Subarmono Suhanan Suhanan, Suhanan Tri Agung Rohmat Tri Agung Rohmat Tri Agung Rohmat Tri Agung Rohmat Wega Trisunaryanti Widi Widayat Wisnu Wardhana, Prabuditya Bhisma Wu Hu Yebi Yuriandala, Yebi Zaka, Ahmad Murtadlo