Article Per Year (5 Year)
p-Index From 2020 - 2025
0.659
P-Index
This Author published in this journals
All Journal Konversi REACTOR : Journal of Research On Chemistry And Engineering International Journal of Renewable Energy Development
Febriyanto, Pramahadi
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Biosynthesis of silver nanoparticles (AgNP) using leaves extract of Jatropha Curcas L. Nury, Dennis Farina; Febriyanto, Pramahadi; Arum, Amalia Sekar; Mayastuti, Sherina; Luthfi, Muhammad Zulfikar
Konversi Vol 12, No 2 (2023): OKTOBER 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v12i2.16610

Abstract

Due to the increased demand for ecologically friendly material synthesis techniques, biosynthesis of nanoparticles has drawn a lot of attention. It has been claimed that an environmentally benign method for producing silver nanoparticles (AgNPs) efficiently can be achieved utilizing leaves extract of the multifunctional plant Jatropha curcas. Maximum absorption were obtained from different types of solvents, in distilled water resulted at wavelength 428-434, meanwhile in ethanol 96% solvent, maximum absorption was obtained at wavelength 338-340 nm by using UV-Vis spectrophotometer, respectively. The results of FTIR formed on silver nanoparticles are O-H functional groups with distilled water and O-H functional groups, and C-O with 96% ethanol solvent. The particle sizes formed in distilled water and 96% ethanol solvents were 104.6 nm and 110.7 nm respectively with PI values of 0.341 and 0.644. Based on the results, (AgNPs) passes the nanoparticle range caused by agglomeration. It can be interpreted that the results of this synthesis are fine particles.
Synthesis of rubber seed shell-derived porous activated carbons for promising supercapacitor application Rustamaji, Heri; Prakoso, Tirto; Devianto, Hary; Widiatmoko, Pramujo; Febriyanto, Pramahadi; Ginting, Simparmin br; Darmansyah, Darmansyah
International Journal of Renewable Energy Development Vol 14, No 2 (2025): March 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60869

Abstract

This work investigates synthesizing activated carbon obtained from rubber seed shells utilizing several activating agents (KOH, CaCl2, and ZnCl2) for supercapacitor applications. Activated carbon was produced from a rubber seed shell using hydrothermal carbonization at 275 °C for 60 minutes and a 120-minute activation treatment at 800 °C. Various activating agents pronounced impacted the pore architecture, surface area, crystallinity, and level of graphitization, which collectively determined the electrochemical characteristics of the resulting materials. Incorporating activation agents enhances the specific surface area and influences the extent of graphitization of activated carbon. The specific surface area of activated carbon products ranges from 367 to 735.2 m² g⁻¹. Further investigation through electrochemical analysis, conducted with a carefully engineered two-electrode system, demonstrated a peak electrode capacitance value of 246 F g-1 at 50 mA g-1 for an ACZn-based supercapacitor. Supercapacitor cells’ energy and power densities reached significant levels, measuring 5.47 Wh kg-1 and 246 W kg-1, respectively. The RSS-derived activated carbon-based supercapacitor exhibited remarkable longevity in a 5000-cycle test, with consistent capacitance retention and coulombic efficiency of 100.11% and 100%, respectively. This work presents a sustainable pathway for producing activated carbon electrodes, contributing to the global circular economy and demonstrating considerable industrial potential.
Pemisahan Butanol dari Campuran ABE Menggunakan Software Aspen Plus: Pengaruh Refluks Rasio terhadap Kandungan Butanol Nury, Dennis Farina; Febriyanto, Pramahadi; Ismi, Lisa Anggraini; Hidayah , Rahmat Taufik
REACTOR: Journal of Research on Chemistry and Engineering Vol. 3 No. 1 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v3i1.43

Abstract

Production of acetone-butanol-ethanol (ABE) through the fermentation process is one alternative that needs to be developed. Less economical in the ABE fermentation process is the difficulty of the separation process from the fermentation product and the by-products of the reaction. Among the separation process methods, such as extraction, distillation, adsorption, and gas stripping, the distillation method is still the most widely used method in the ABE separation process. The purpose of this study was to provide recommendations for predicting good ABE separation and producing optimum operating conditions to produce high % butanol content. Which is then simulated using Aspen Plus V11 software. This study varied the reflux ratio in the distillation column and the decanter operating temperature. The results showed that butanol purity reached 90.33% in the radfrac 1 column operated at a pressure of 1.3 atm with a reflux ratio of 5, the location of the 7th feed stage and the number of stages 11. Then proceed to the purification stage in the radfrac column 2 which is operated at a pressure of 2 atm with a reflux ratio of 5, the location of the 4th stage feed and the number of stages 5. The decrease in the reflux ratio of the radfrac column causes a decrease in the butanol content at the bottom so that the purity of butanol also decreases and decreases % recovery or recovery of butanol. This is also followed by the location of the feed stage, which is getting higher, and the number of stages is increasing.
Co-Authors Arum, Amalia Sekar DARMANSYAH . Dennis Farina Nury Devianto, Hary Heri Rustamaji Hidayah , Rahmat Taufik Ismi, Lisa Anggraini Mayastuti, Sherina Muhammad Zulfikar Luthfi Simparmin br Ginting Tirto Prakoso Widiatmoko, Pramujo