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All Journal International Journal of Advances in Applied Sciences Jurnal Teknik Mesin Ensiklopedia of Journal Jurnal Teknik Mesin Makara Journal of Technology Jurnal Teknologi dan Vokasi
Nofriady Handra, Nofriady
Institut Teknologi Padang
Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences

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PENINGKATAN SIFAT GLASS-CERAMICS FLY ASH TERVITRIFIKASI DENGAN PENAMBAHAN 30 WT.% ALUMINIUM SILIKAT DAN PENGATURAN SUHU SINTER Nurzal, Nurzal; Pratiwi, Putri; Handra, Nofriady; Perdana, Mastariyanto; Hafni, Hafni
Jurnal Teknologi dan Vokasi Vol 3 No 1 (2025): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2025.3.1.116-121

Abstract

This study investigates the effects of adding 30 wt.% aluminum silicate and varying sintering temperatures on the density and hardness of vitrified fly ash glass ceramics. Fly ash, a waste by product from coal combustion at the Suralaya thermal power plant has long posed environmental challenges. To mitigate these impacts, this research explores its utilization in producing glass ceramics. The samples were prepared as cylindrical samples with a diameter of 15 mm and thickness of 5 mm, and were fabricated using uniaxial pressing at 120 MPa. The samples were sintered at 1050, 1100, and 1150 °C with a heating rate of 5 °C/min. Experimental results reveal that adding 30 wt.% AS significantly improves the density from 2.31 to 2.51 g/cm³ and hardness from 443 to 2418.55 MPa compared to 100 wt.% fly ash. Optimal density and hardness were achieved at a sintering temperature of 1150 °C.
STUDI PERFORMA BRIKET AMPAS KOPI DENGAN CAMPURAN SERAT SAWIT DENGAN PEREKAT SARI BUNGA SEPATU (Hibiscus Rosa-Sinensis) Denas, Fahrezi; Handra, Nofriady
Ensiklopedia of Journal Vol 7, No 4 (2025): Vol. 7 No. 4 Edisi 1 Juli 2025
Publisher : Lembaga Penelitian dan Penerbitan Hasil Penelitian Ensiklopedia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/eoj.v7i4.3244

Abstract

In the future, world energy will be threatened by the increasing difficulty of finding energy sources from fossils. Experts argue that with current consumption patterns, fossil energy is expected to run out soon. Petroleum will run out in 30 years in 2052,.This study aims to determine the performance of briquettes from coffee grounds waste mixed with EFB (Empty Fruit Bunch) fiber and glued using hibiscus rona-sinesis flower extract as a natural adhesive. Variations in the ratio of coffee husk and EFB mixture (9:1, 8:2 7:3) were used to test the physical and chemical characteristics of briquettes, including density, water content, volatile matter, fixed carbon, calorific value, and ash content, which were compared with Indonesian national standards (SNI 01-6235-2000). The results showed that increasing the proportion of coffee grounds increased the calorific value of the briquettes, but the fixed carbon and volatile matter values did not meet the established standards. Other parameters such as water and ash content had met the national standards. The average density of briquettes ranges from 0.39–0.40 g/cm³, with a mixture ratio of 9:1 producing the highest calorific value, which is 4,625 cal/gram.Keywords  : Briquettes, Biomass, Calorific value, Hibiscus extract, Coffee grounds, Empty Fruit Bunch (EFB)
Briquette of Empty Fruit Bunch Fiber as an Alternative Substitution for Binderless Fuel Methods Handra, Nofriady; Indra, Ade
Makara Journal of Technology Vol. 27, No. 3
Publisher : UI Scholars Hub

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Abstract

Biomass development has been a key issue for the past few decades and will remain attractive in the future because of its cleanliness, renewability, carbon neutrality, and other advantages. This study aims to determine the optimal holding time for heating system briquettes by testing the heating value of empty fruit bunches fibers. The process of this research involves the use of one unit of briquette molding equipment by providing a heating system to the mold cylinder. Fibers were manually finetuned until they reached a size of 20 mesh (0.84 mm). Densification temperature is an essential factor that could affect the combustion properties, especially the calorific value. The Arduino program is used for setting the heating resistance time of the mold, which is 15, 20, and 25 min at a temperature of 200 ºC, and the thermal controller is used to adjust the temperature variation. Results showed that the highest calorific value of the three varieties of holding time was at 25 min with a calorific value of 4480.2 cal/g, and the lowest cost at 15 min was 4022 cal/g. Meanwhile, a calorific value of 4432.5 cal/g was found at 20 min. This finding is due to the low moisture content and high charcoal content of the sample in the 25 min briquette mold. Therefore, briquettes at 25 min have a higher heating value compared with those at 15 and 20 min holding time.
Co-Authors Ade Indra Anwar Kasim Arfidian Rachman Brazi Brazi Brazi David A David A. Denas, Fahrezi G Gunawarman, G Hafni Hafni Mastariyanto Perdana Nesti, Lisa Peri Indra Yudi Putri Pratiwi Randa J Rio Ansuni Rio Fernando Rio Fernando Santosa Santosa Santosa Santosa Sudarisman Sudarisman Suryadi Suryadi