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All Journal KOVALEN: Jurnal Riset Kimia FLUIDA
Marhani, Della Agustia
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Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology

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sebuah Karakterisasi dan Pembuatan Half Cell SOFC Berbasis Ni-YSz dengan Menggunakan NiO Lokal Jayanti, Retno Dwi; Riniati, Riniati; Marhani, Della Agustia; Febryanti, Chyntia Wahyuni; Troskialina, Lina
Fluida Vol. 18 No. 1 (2025): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v18i1.6023

Abstract

Indonesia has great potential to produce Nickel Oxide due to the abundance of Ni resources that can be used for the manufacture of SOFC anode components. Ni-YSZ which is a mixture of metal and ceramic is widely used SOFC anodes. Ni was selected because it exhibits high electrical conductivity and serves as an internal reforming catalyst. In this study, the characterization and manufacturing of Ni-YSZ-based half cells using domestic NiO were conducted. The stages of half cell fabrication begin with the mixing of solid and liquid materials and, the process of milling, sonication, degassing, tape casting, and sintering. The manufacture of half cells was carried out by adding an anti-foam concentration with a variation of 0.4; 0,6; and 0.8%. The optimal percentage composition was 0.4% anti-foam variation with a visual appearance that was not cracked, slightly curved and posed a pore size of 0.779 μm. The results of the domestic NiO characterization of imported NiO showed greater element percentage values and viscosity values, a slightly curved half cell visual appearance, good electrolyte density, and porosity values that were not in accordance with the range.
Pembuatan dan Karakterisasi Kertas Kemasan Berbasis Ampas Kunyit dan Jahe Merah dengan Variasi Konsentrasi Natrium Hidroksida: Preparation and Characterization of Packaging Paper Based on Turmeric and Red Ginger Pulp with Varying Concentrations of Sodium Hydroxide Jannah, Devia Fataya Miftahul; Febryanti, Chyntia Wahyuni; Alfiah, Diana; Huwaida, Melina Rahma; Marhani, Della Agustia; Riniati, Riniati
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 3 (2023): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i3.16537

Abstract

The production of herbal beverages such as ginger, turmeric, and other spices generates waste that is commonly discarded. The cellulose content in red ginger is about 60-80%, and in turmeric, it is 50%. The high cellulose content makes red ginger and turmeric waste suitable for use as raw materials for paper production. The objective of this research is to determine the optimum conditions for making paper based on red ginger and turmeric waste. The pulp formation process was carried out using the Semi-Mechanical Method, which involves the addition of chemical solutions and grinding, on a mixture of turmeric and red ginger waste (60:40) with variations of NaOH concentration at 8%, 10%, and 13% (w/v). The papermaking process began with refining and drying the waste, cooking the pulp, adding water and kaolin filler, and then printing. Characterization included antibacterial testing, tensile strength, and grammage. Based on the pulp characterization results at the optimum NaOH concentration of 8%, the moisture content was 8.89%, cellulose content was 49.28%, and lignin content was 9.28%. These parameters comply with the national standard (SNI) for packaging paper. The paper characterization results showed a tensile index of 2.12 Nm/gram, an antibacterial inhibition zone of 5 mm, and a grammage of 13 g/m2. This research indicates that the NaOH concentration influences the moisture, cellulose, and lignin content. Furthermore, based on the characterization results, paper made from turmeric and ginger waste has the potential to be used as antimicrobial packaging paper.
Biogasoline Production from Shallot Skin Waste with KOH-Clay Catalyst to Create Clean Energy Keryanti, Keryanti; Amalia, Dhea Nurul; Indrita Putri, Anindya; Marhani, Della Agustia; Amalia, Putri Vina; Rizki, Anwar Muhamad
Fluida Vol. 16 No. 2 (2023): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16i2.4591

Abstract

Finding alternative fuels to replace fossil fuels has been made easier by the rise in the consumption of fuels like petrol and the fall in the production of national petroleum exploration activities. This research has been prompted using biomass as an alternative fuel. The primary raw material is shallot skin waste because it has enough lignocellulosic content to be used, one of which is to manufacture biogasoline by using the characteristics of petrol E10. A KOH-Clay catalyst is employed in a thermal and catalytic reaction to influence the reaction's pace. Starting with raw material preparation, conversion procedure, purification, and investigation of the physical properties of biogasoline at specific temperature fluctuations for an hour, the KOH-Clay catalyst is pretreated and characterised. It was discovered through this research that the montmorillonite KOH-Clay content was 5.73, indicating that the catalyst is hygroscopic and absorbs non-polar molecules, making it suitable for use as a catalyst with a pH of 6. As a result, at 60°C temperature circumstances, the best%yield results were attained of 35.025%. While the density value (0.950 gr/cm3) and colour (specific gravity, brownish yellow, and clear/bright) of the experimental results do not meet predetermined standards, they do when viewed from the viewpoint of physical parameters such as specific gravity (0.8358), oAPI biogasoline (37.794), and calorific value (18807.65 Btu/Ib). However, leftover shallot peels generally have the potential to be utilised as clean renewable energy.
Co-Authors Alfiah, Diana Amalia, Dhea Nurul Amalia, Putri Vina Febryanti, Chyntia Wahyuni Huwaida, Melina Rahma Indrita Putri, Anindya Jannah, Devia Fataya Miftahul Jayanti, Retno Dwi Keryanti, Keryanti Riniati Rizki, Anwar Muhamad Troskialina, Lina