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All Journal KOVALEN: Jurnal Riset Kimia FLUIDA
Febryanti, Chyntia Wahyuni
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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.
Co-Authors Alfiah, Diana Huwaida, Melina Rahma Jannah, Devia Fataya Miftahul Jayanti, Retno Dwi Marhani, Della Agustia Riniati Troskialina, Lina