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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 6 Documents
 1 
Search results for , issue "VOLUME 7 NO.1 JUNE 2023" : 6 Documents clear
Effectivity Of Zeolite As An Adsorbent For Methyl Violet Adsorption Wardalia, Wardalia; Septi, Dede; Dewiyanti, Isna; Kanani, Nufus; Adiwibowo, Muhammad Triyogo
World Chemical Engineering Journal VOLUME 7 NO.1 JUNE 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i1.20851

Abstract

The textile industry in Indonesia is developing. This development aligns with the amount of waste produced, such as dyes and metal waste, which can harm the environment and must be processed. One of the waste treatment methods that can be used is adsorption using zeolite. This study aims to determine the absorption effectiveness of Bayah natural zeolite adsorbents on lead and methyl violet waste. The zeolite was mashed and uniformed in size up to 80 mesh and then washed and heated to 120℃ to remove impurities in the zeolite. Then the zeolite was activated using 1 M HCl and 1 M NaOH activators and calcined at 500 ℃ for 4 hours. This research was carried out by varying the mass of the adsorbent as much as 0.5 and 1 g and the adsorption stirring time for 30 and 60 minutes. The results show that the maximum adsorption capacity was 181.84 mg/g with an efficiency of 91% for methyl violet adsorption and 198.7 mg/g with an efficiency of 99.57% for lead adsorption. The adsorption of natural zeolite on methyl violet and lead metal followed the Langmuir isotherm pattern with adsorption capacity of 23.04 mg/g and 87.72 mg/g, respectively.
Characteristics of Refuse-Derived Fuel (RDF) at The Waste Processing Facility (WPF) of The Faculty of Engineering, Untirta Suhendi, Endang; Heriyanto, Heri; Jundika, Paerus; Rizkiantika, Natasya
World Chemical Engineering Journal VOLUME 7 NO.1 JUNE 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i1.20614

Abstract

Landfill in Cilegon City has an impact on the environment, so processing is needed, one of which is converting waste into RDF fuel. The conversion of waste into RDF provides benefits by reducing the amount of waste sent to landfills and utilizing renewable energy as fuel. The composition of mixed materials in RDF has potential characteristics that affect the quality of the resulting RDF. The study objective is to study the effect of the composition of a mixture waste of organic (leaves) and LDPE plastic on the characteristics of RDF. The research was conducted with composition ratios of organic waste (leaves) and LDPE plastic waste at 95:5, 90:10, 85:15, and 80:20 (% wt.). The results showed that the optimal RDF product was produced with a composition of 85:15 and with the addition of 10% starch. These results indicate the characteristics of RDF, including an ash content of 14.681%, moisture content of 11.215%, volatile matter of 54.465%, fixed carbon of 19.469%, calorific value of 4598.017%, bulk density of 0.706 g/cm3, and compressive strength of 6.69 kg/cm2. It has the potential to be a good alternative for using RDF as fuel in boilers.
Synergistic Ability of Tannin – Silica as a Corrosion Inhibitor with the Addition of KI to Mild Steel in Demineralized Water Arief, Hendra; Pramudita, Marta; Pitaloka, Alia Badra
World Chemical Engineering Journal VOLUME 7 NO.1 JUNE 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i1.20626

Abstract

The rapid industrial growth in Indonesia today requires effective and efficient operating and maintenance conditions. The application of corrosion protection in cooling towers and boilers shows that inhibitor materials such as nitrates, nitrites and chromates must be used in large concentrations; these inhibitors also cause environmental pollution. For this reason, bio-inhibitors derived from natural ingredients have begun to be developed. Tannins and silica are widely known as effective inhibitors in controlling carbon steel corrosion. The synergistic mechanism of inhibitors is known to increase the effectiveness of inhibitory substances. This study aims to study the effectiveness and understand the mechanism of tannin and silica inhibitors and the effect of adding potassium iodide. as a synergistic inhibitor. This study used samples of mild steel carbon steel with demineralized water media at a temperature variation of 30-60oC and immersion time of 1, 2 and 3 hours. Variations in the concentration of tannins and silica used are 0-1250 ppm, and the corrosion measurement method uses the weight loss method. The results showed that adding potassium iodide. They have increased the ability of mild steel corrosion inhibitors produced by tannin-silica synergy. The corrosion rate of mild steel can be reduced by 82.95% at a concentration of tannin-silica-KI 1250 ppm. Therefore, tannin-silica synergy with the addition of potassium iodide. It has the potential to be a good alternative in the use of corrosion inhibitors for mild steel in demineralized water.
Effect of Temperature on Damar Resin-Based Bio-Coating on Mild Steel in Corrosive Media (Acid Effect) by Using Silica from Rice Husk Extract Luqmanulhakim, M. Naufal; Sulaiman, Fatah; Pramudita, Marta
World Chemical Engineering Journal VOLUME 7 NO.1 JUNE 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i1.20628

Abstract

Bio-coating is a natural anti-corrosion coating material that can be easily degraded and renewed. Rice husk extract and damar resin are alternative natural materials believed to have a relatively high silica content, so they can be used as a substitute for synthetic chemicals in protecting metals from corrosion. This research aims to determine the heat resistance ability of bio-coating on mild steel in a 1 M H2SO4 acid corrosive medium. The experimental object used rice husk waste and damar resin as raw materials. The analytical method used is the weight loss method. Damar resin and silica sol, obtained from rice husks' ashing, are mixed to form a homogeneous product. Metal samples coated with bio-coating material were immersed in 1 M sulfuric acid solution, with silica concentrations of 1500 ppm, variation times 1, 3, and 5 hours, and at temperatures of 30, 40, 60, and 80 °C. At 80 °C, the corrosion rate is very high, which proves that the temperature significantly affects the corrosion rate of mild steel immersed in an acid solution. The results showed that the best conditions were four hours of immersion time temperature of 40°C, with an inhibition efficiency of 98%
STUDY OF REACTION KINETICS ON BIODIESEL PRODUCTION USING IN SITU METHOD WITHOUT CATALYST Naulina, Rosada Yulianti; Hendratama, Handik; Nury, Dennis Farina; Zullaikah, Siti
World Chemical Engineering Journal VOLUME 7 NO.1 JUNE 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i1.18564

Abstract

Biodiesel from rice bran using an uncatalyzed in-situ transesterification method in subcritical ethanol - water has been investigated. This method is known to be economical because the experimental steps are reduced and environmentally friendly because we do not use a catalyst. In this experiment, CO2 was used as a compressed gas and ethyl acetate as a co-solvent to increase yield. This reactor is equipped with a stirrer that uses a magnetic stirrer. Rice bran, a mixture of water, ethanol and ethyl acetate in a mole ratio of 1:10:9:2 is fed into the reactor, then injecting CO2 gas to increase the pressure and to ensure the reaction takes place under subcritical conditions under operating pressure of 80 bar.Temperature (120 - 200ᵒC) and reaction time (1 - 4 hours) were investigated to increase biodiesel. The highest yield of FAEE composition at 200ᵒC for 3 hours was 91.264% with the results of calculating the kinetics of the transesterification reaction, the values of k1 and k2 were 0.349.10-3 and 0.0045 mL3.mmol-3.min-1. Meanwhile, in the esterification reaction, the values for k1 and k2 were 0.0194 and 0.0579 mL3.mmol-3.min-1.
Transformation of Natural Zeolites by the Fusion-Hydrothermal Method for Ammonium Adsorption Lestariningsih, Devi; Kurniawan, Teguh; Nuryoto, Nuryoto
World Chemical Engineering Journal VOLUME 7 NO.1 JUNE 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i1.20545

Abstract

Zeolite application as an ammonium adsorbent has been widely studied. However, there is no previous research on transformation of Malang natural zeolite and its application as ammonium adsorbent. In this study, characterization of the zeolite was carried out by XRD, XRF, nitrogen adsorption-desorption, SEM and FTIR tests. With the addition of 18 g of NaOH and heated with temperature of 550 0C for 2 h during the fusion, continued with aging for 18 h and temperature 100 0C during hydrothermal stage, the fusion-hydrothermal method had transformed Malang natural zeolite which dominated by quartz and small amount of mordenite into transformed zeolite dominated by zeolite X. Malang natural zeolite best fitted the Elovich adsorption kinetics model with  0.0096 and ẞ 11.93 and SSE 0.003 and Langmuir isotherm model with qmax 32.38 mg/g and KL 0.01 L/mg with SSE 0.27, while the transformed zeolite best fitted the Intraparticle diffusion model with ki 0.0084 and C 0.017 with SSE 0.006 and Freundlich isotherm model with KF 0.00035 L2.56/(mg1.56/g) and n 0.39 with SSE 1.17. Fusion-hydrothermal has changed the crystal shape from mostly the broken needle shape to round cube shapes, decreased the Si/Al ratio from 5.56 to 1.15, and increased the surface area from 43.5 m2/g to 89.8 m2/g.

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