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World Chemical Engineering Journal
Published by Universitas Sultan Ageng Tirtayasa
ISSN : -     EISSN : 24432261     DOI : https://dx.doi.org/10.62870/wcej.v8i1.26617
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering
WCEJ publishes original papers and reviewed papers on the fundamental, theoretical as well as applications of Chemical Engineering. WCEJ is published two times a year. This journal covering some aspects of chemical engineering, which are environmental chemical engineering, chemical reaction engineering, bioprocess-chemical engineering, materials synthesis and processing.
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 5 Documents
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Search results for , issue "VOLUME 6 NO. 2 DECEMBER 2022" : 5 Documents clear
Analysis of Characteristics of S45C Steel Changes due to the Quenching and Tempering Process Golwa, Gian Villany; Romahadi, Dedik; Arwati, I Gusti Ayu
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v6i2.17611

Abstract

S45C steel has a carbon content of 0.50% and its classified as medium carbon steel. The main element content of S45C is carbon (C) is 0.50%, sulphur (S) is 0.035%, and manganese (Mn) is 0.80%. Tempering is a heat treatment process in which the hardening or normalizing process was previously carried out on steel. The research method was carried out where the steel was heated below the critical temperature and cooled. Quenching is a process of rapidly cooling the material from austenitizing from a temperature range of 815 °C to 870 °C for steel. S45C steel was quenched at 950 °C for 120 minutes, then tempered at 700 °C, and 500 °C for 120 minutes. The raw material sample (without heat treatment) is the initial reference standard among the samples undergoing the heat treatment process. They are then analyzed, and the influence and changes in the characteristics after that. In addition, changes in mechanical properties due to the heat treatment process experienced by S45C steel use tensile tests, Charpy impact tests, hardness tests and microstructures. The research results on the quenching process sample were tempered at a temperature of 500 °C and held for 120 minutes, increasing tensile strength by 17.1% and yield strength of 56.82%.
Review: Biogas Production from Rice Straw Sari, Listiyani Nurwindya; Prayitno, Hadi; Farhan, Muhamad; Syaichurrozi, Iqbal
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v6i2.17995

Abstract

Rice straw is a rice plant whose fruit (grain) has been removed, so only the stems and leaves are left. Rice straw is the largest among rice plant waste and has not been utilized as well. Utilization of rice straw waste is not optimal because its usually used for cattle feed and as organic fertilizer. Apart from being used as cattle feed and organic fertilizer, methane gas can still be used for alternative renewable energy sources such as biogas. Rice straw has a carbon-to-nitrogen (C/N) ratio content between 50-70. However, to achieve the optimum biogas formation, the substrate requires a C/N ratio of 20-30, therefore a combination of other waste mixtures, such as cow dung or waste that has a low C/N ratio content is usually carried out.
Review: Biogas Production from Cow Dung and Its Potential in Indonesia Apriantika, Anellysha Putri; Anwari, Ropi; Janah, Citra Nurul; Syaichurrozi, Iqbal
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v6i2.17994

Abstract

Cows are ruminant livestock used as a source of food and the economy. Besides that, cows also produce waste, namely cow dung. If cow dung piles up in the open and spreads, it will carry by rainwater to lower places, which can cause soil and air pollution. To reduce cow dung waste can be used as a substrate in an anaerobic digester to produce biogas. Important factors that can affect the biogas rate include pH, temperature, Total Solid (TS) and Volatile Solid (VS) content, and the C/N ratio. The yield of biogas can be optimal with pretreatment and co-digestion. The potential for cow dung can generate electricity of 5,580 kW per day from 18 million head of cattle.
Synthesis of Alkyd Resin Through Alcoholysis – Polyesterification Process from Used Cooking Oil Pretreatment Using Alkaline Activated Natural Bayah Zeolite Suhendi, Endang; Heriyanto, Heri; Fitri Asyuni, Nadya; Kiki Shahila, Ilham
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v6i2.17882

Abstract

Waste cooking oil can be treated by an adsorption process using Bayah natural zeolite as raw material for alkyd resin synthesis. This study aimed to determine the optimum conditions for the equivalent ratio of OH:COOH and the temperature of the alkyd resin synthesis. The research was carried out by preparing used cooking oil and Bayah natural zeolite (BNZ), adsorption process, and alkyd resin synthesis through the alcoholysis-polyesterification process. The optimum addition of Bayah natural zeolite-activated NaOH 0.75 N in pretreatment waste cooking oil is 30% weight in terms of color, density, viscosity, and functional group characteristics of the resulting alkyd resin. The characteristics of the alkyd resin product at optimum conditions obtained light brown color with an OH: COOH equivalent ratio of 1.4, and the alcoholysis and esterification temperature at 190 oC with a density value is 1.112 g/cm3, FFA value is 0.1528%, viscosity value is 4808 cP. The ester functional group at wavelengths 1267 cm-1 and 1722 cm-1, the 1H NMR spectrum of the ester group at the peak of 3.5 ppm, and a functional group of 7.6 ppm.
Temperature Effect on Corrosion Rate of Metal AA 5052 Using D-Galactose Inhibitors In Sulfuric Acid Media With Electrochemical Method Arwati, I Gusti Ayu; Syahbana, Fikri; S., Wiwit; Maryani, Yeyen
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v6i2.17079

Abstract

Aluminum Alloy 5052 (AA 5052) is a metal that can be used as a biopolar plate in proton exchange membrane fuel cell (PEMFC), because it has the advantages of being resistant to corrosion, high conductivity, easy shape and light weight. PEMFC produces electrical energy and the rest of the process in the form of hot water and steam. In a bipolar plate PEMFC environment corrosion can easily occur due to an acidic environment and high operating temperature around 40°C-80°C. For this reason, a treatment is needed to strengthen the corrosion-resistant properties of AA 5052. The coating of the material can be done using the technique of electrophoretic deposition (EPD) using green inhibitor to reduce the corrosion rate. The electrochemical method was carried out to see how much influence temperature had on the corrosion rate of AA 5052. In this study, d-galactose green inhibitor with a concentration of 0.5 g, EPD time of 20 minutes was used, in a PEMFC environmental simulation in 0.5 M H2SO4 sulfuric acid medium, with test temperatures of 25°C (room temperature), 40°C, 60°C, and 80°C. From the results of the analysis using the electrochemical method, there was an effect of temperature on the corrosion rate of AA 5052 without an inhibitor layer of 0.3610 mmpy at room temperature and increased at 80°C 3.9527 mmpy. While AA 5052 which was coated with a d-galactose inhibitor, had a corrosion rate of 0.1678 mmpy at room temperature and continued to increase at a temperature of 80°C 3.7745 mmpy. Inhibitor efficiency was 53.51% at room temperature and decreased with increasing temperature to 4.5% at 80°C.

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