Article Per Year (5 Year)
p-Index From 2021 - 2026
0.23
P-Index
This Author published in this journals
All Journal Jurnal Teknik Kimia USU Jurnal Teknik Kimia USU
Okta Bani
Universitas Sumatera Utara
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
BIOBRIQUETTE PRODUCTION FROM PALM FRONDS AND SHELLS: EFFECT OF MATERIAL COMPOSITION AND PARTICLE SIZE Okta Bani; Iriany, Taslim; Cici Novita Sari; Cindy Carnella
Jurnal Teknik Kimia USU Vol 7, No 1 (2018)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.959 KB) | DOI: 10.32734/jutek.v7i1.20438

Abstract

Briquettes are solid fuels from organic materials with high calorific values ​​and burn duration. The composition and particle size of the raw material may affect briquette quality. This study aimed to evaluate the effect of composition and particle size on calorific value and characteristics of the resulting briquettes. In this study, briquettes were made using palm oil fronds and shells at mass ratio of 1:2, 1:4, 1:6, 1:8 and particle size of not-dertemined, 50, 70, and 100 mesh. First, raw material was carbonized at 450°C for 30 minutes then added to 20%wt. starch glue and waste oil (1:1 ratio). Resulting briquettes were analyzed for its water content, ash content, density, volatile matter content, fixed carbon content, combustion rate, calorific value, and compressive strength. Satisfying results were obtained for briquettes with a front to shell ratio of 1:8, and a particle size of 100 mesh. At this condition, the resulting briquettes have water content of 5.5%; ash content of 2.54%; density of 0.51 g/cm3; 19.58% vapor content; fixed carbon content of 72.38%; combustion rate of 0.2 g/min (3.4×10-3 g/sec); calorific value of 15.3 kcal/g; and compressive strength of 0.06 N/mm2. These results have complied with the Indonesian National Standard (SNI), Japanese, American, and English standards, except for briquette compressive strength, which have not met the industrial standard.
Pengaruh Variasi Aktivator KOH dan NaCl terhadap Kapasitas Adsorpsi Biji Kapuk (Ceiba pentandra) dalam Penjerapan Ion Fe(II) Kelvin Hadinatan; Iriany; Taslim; Okta Bani; Yesi Artanti; Nafis Ijlal Syach
Jurnal Teknik Kimia USU Vol. 15 No. 1 (2026): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v15i1.23194

Abstract

Heavy metal contamination such as iron (Fe) in wastewater is a significant environmental issue due to its negative impact on ecosystems and human health. This study aims to synthesize adsorbents from kapok seeds (Ceiba pentandra) by examining the effect of activator type (KOH and NaCl) and particle size (100 and 120 mesh) on the adsorption capacity of Fe(II) ions. The research methodology includes carbonation and chemical activation processes, followed by adsorption kinetics testing. The results showed that the use of NaCl activator with a particle size of 120 mesh provided the best performance with an equilibrium adsorption capacity of 89.75% and an iodine number of 127 mg/g. Kinetic analysis showed that the Fe(II) ion adsorption process followed a pseudo-second-order kinetic model with an R2 value of 0.999, indicating that the main adsorption mechanism was chemisorption through a two-step interaction involving diffusion and intermolecular interactions in the adsorbent area.
Co-Authors Cici Novita Sari Cindy Carnella Iriany Iriany, Taslim Kelvin Hadinatan Nafis Ijlal Syach Taslim Yesi Artanti