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All Journal International Journal of Advances in Applied Sciences Jurnal Teknik Mesin Ensiklopedia of Journal Jurnal Teknik Mesin Jurnal Teknologi dan Vokasi
Nofriady Handra, Nofriady
Institut Teknologi Padang
Arts Humanities 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)
Co-Authors 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