Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Rekayasa Mesin
Sinurat, David Fernando
Unknown Affiliation
Mechanical Engineering

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

Found 2 Documents
Search

 1 
THERMODYNAMIC ANALYSIS OF ALKALINE ELECTROLYSIS UNDER VISIBLE LIGHT ILLUMINATION: COMPARATIVE ASSESSMENT OF GREEN AND BLUE LED EXPOSURE Santoso, Mardi; Ahmad, Anton Royanto; Sinurat, David Fernando; Hamidi, Nurkholis; Purnami
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

This study explores the thermodynamic behavior of alkaline electrolysis under visible light illumination, focusing on the effects of green and blue wavelengths in the absence of chemical additives. Through a series of controlled experiments, temperature evolution, energy input, and thermal efficiency were analyzed over a 20-minute electrolysis period. Results show that both green and blue light enhance the system's thermal response compared to dark (control) conditions, with blue light achieving the highest temperature rise and energy conversion efficiency. Arrhenius analysis revealed a clear temperature dependence of the rate constant, and strong correlations were observed between temperature rise (ΔT), heat energy (Q), and system efficiency. These findings suggest that visible light particularly blue light can significantly improve the thermal dynamics of electrolysis systems, paving the way for low-cost, passive solar-assisted hydrogen production.
Biosurfactant-Assisted Hydrogen Evolution: Effects of Sapindus Rarak Extract on Alkaline Electrolysis Performance Santoso, Mardi; Sinurat, David Fernando; Ahmad, Anton Royanto; Hamidi, Nurkholis; Purnami, Purnami
Jurnal Rekayasa Mesin Vol. 17 No. 1 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v17i1.2151

Abstract

Hydrogen production through alkaline water electrolysis is a promising pathway for clean energy generation, yet its efficiency is often limited by gas bubble accumulation on electrode surfaces. This study explores the use of a natural surfactant derived from Sapindus rarak (lerak) as a green additive to improve hydrogen evolution reaction (HER) performance. Experimental results show that the natural surfactant-enhanced system achieved a 135% increase in cumulative hydrogen yield over 10 minutes. Mechanistically, the natural surfactant lowered the surface tension, reduced bubble nucleation size, and promoted faster detachment from the electrode surface, thereby preserving catalytic activity. Compared to synthetic surfactants like sodium lauryl sulfate, Sapindus rarak offers advantages in natural degradability, environmental safety, and regional availability. This study demonstrates that natural plant-based surfactants can serve as effective, eco-friendly enhancers in electrochemical hydrogen production. The results provide a foundation for integrating natural surfactants into scalable and sustainable green hydrogen systems.
Co-Authors Anton Royanto Ahmad Mardi Santoso Nurkholis Hamidi Purnami Purnami Purnami