Article Per Year (5 Year)
p-Index From 2021 - 2026
0.562
P-Index
This Author published in this journals
All Journal REKAYASA CHEESA: Chemical Engineering Research Articles Makara Journal of Science
Alisya, Rona
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Electrical & Electronics Engineering Engineering Physics

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

Found 3 Documents
Search

 1 
Evaluation of Heat Loss Effect on Package Boiler Performance (5007-U) in the Utility Unit of Urea Fertilizer Industry Putri, Rizka Wulandari; Merdeka, M. Fabian; Alisya, Rona; Rahmatullah, Rahmatullah; Haviz, Muhammad
CHEESA: Chemical Engineering Research Articles Vol. 7 No. 2 (2024): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v7i2.19292.67-74

Abstract

Package boiler (PB) is a utility unit essential for producing steam by heating Boiler Feed Water (BFW) through the combustion of natural gas with air. Therefore, this study aimed to investigate the effect of heat loss on PB efficiency. To achieve this, direct and indirect methods were adopted, with data collected between 4 July and 29 August 2023. The results showed that PB efficiency in the fertilizer industry during this period ranged from 76.06% to 80.71%. On August 29, 2023, under optimal conditions, an efficiency of 80.71% was achieved, while a significant drop to 65.44% occurred during the 6th week on August 8, 2023, due to low oxygen (O2) levels. Flue gas analysis on August 29, 2023, obtained 3.64% excess O2, 11.17% carbon dioxide (CO2), and 0.04% carbon monoxide (CO). PB performance was influenced by heat loss from the dry flue gas, hydrogen (H2) content on flue gas, moisture in air and fuel, incomplete combustion, as well as radiation and convection phenomena.
Refining Used Cooking Oil Using Tapioca Starch (Manihot esculenta) and Lime (Citrus aurantifolia) Hadiah, Fitri; Alisya, Rona; Fitriyani, Della
Rekayasa Vol 17, No 3: Desember, 2024
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v17i3.27560

Abstract

Used cooking oil is cooking oil that has been used multiple times, leading to decreased in quality. This decline in quality occurs due to the degradation of the cooking oil's components. The community, especially traders, prefers to use used cooking oil or reuse cooking oil multiple times because it is more profitable than using fresh cooking oil. Using this used cooking oil can cause cholesterol issues in the body. This research aims to refine used cooking oil using carbon-rich tapioca starch and antioxidant-rich lime which is expected to restore the quality of used cooking oil. This research uses the experimental method by varying the mass of the adsorbent, specifically the ratio of tapioca starch mass at 5%, 10%, and 15%, and the lime mass ratio at 5%, 10%, 15%, and 20%. The used cooking oil refining process was conducted by mixing used cooking oil and adsorbents for one hour at a speed of 200 rpm and then allowed to stand for 2 days. This research aims to study the effect of the amount of tapioca starch and lime as adsorbents on the viscosity, density, and acid number of refined used cooking oil. The optimal use of adsorbent is 20% tapioca starch and 10% lime, resulting in a density of 0.9760 g/cm³, viscosity of 18.9452, and an acid number of 2.8719 mg KOH/gram oil.
Synthesis of Activated Carbon from Coconut Shell and Recycled Styrofoam Nanofiber for Water Filtration Dani, Rahma; Ismet, Ismet; Marlina, Leni; Alisya, Rona; Aldi, Muhamad Abel Kirana; Ludiansyah, Anggi; Kurdiati, Lintang Auliya; Idjan, Meutia Kamilatun Nuha AP; Mataram, Agung; Almafie, Muhammad Rama; Sriyanti, Ida
Makara Journal of Science Vol. 28, No. 4
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Water pollution affects life sustainability; hence, several efforts have been exerted to overcome this problem. For ex-ample, nanofiber membrane technology is introduced to retain solutes while allowing only water molecules to pass through the system. Therefore, this study aimed to maximize the technology for water filtration using the electrospin-ning method by combining Styrofoam waste-based polymer with activated carbon from coconut shell waste (ACCS). The nanofiber diameter produced ranged from 590 nm to 610 nm with porous characteristics and without beads. The carbon content varied from 68.04% to 69.84%, according to the energy dispersive X-ray measurement, demonstrating the composite’s effectiveness. The Fourier transform infrared spectroscopy results also indicated carbonization and activation, along with water removal, associated with O-H stretching vibrations of alcohol and phenol, as well as N-H stretching vibrations of amino bonds. Moreover, the mechanical properties were measured using a single-fiber tensile test on X-ray diffractometry (XRD) analysis, and Young’s modulus was successfully maintained at 3,209.15 ± 632.877 and 1,839.12 ± 212.637 kPa due to the material amorphous nature. The contact angles were 126.5° and 131°, demon-strating ultra-hydrophobic properties. The addition of ACCS has led to a superior porosity structure for waste filtration. The clean water permeability test also showed that the membrane can withstand a 1–4 bar pressure for 15–60 seconds, demonstrating its strength in resisting water resistance. The trend shows the capacity of the material to potentially func-tion as a superior candidate for water filtration.
Co-Authors Agung Mataram Aldi, Muhamad Abel Kirana Almafie, Muhammad Rama Dani, Rahma Fitri Hadiah Fitriyani, Della Ida Sriyanti Idjan, Meutia Kamilatun Nuha Ap Ismet Ismet, Ismet Kurdiati, Lintang Auliya Leni Marlina Ludiansyah, Anggi M. Haviz Merdeka, M. Fabian Rahmatullah Rahmatullah Rizka Wulandari Putri