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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 85 Documents
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Engineering and Fabrication of TiO2 Photocatalyst: review Pujiastuti, Hendrini; Kustiningsih, Indar
World Chemical Engineering Journal VOLUME 8 NO.1 JUNE 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v8i1.25787

Abstract

The photocatalytic reactions occurring on the surface of TiO2 photocatalysts are crucial factors determining the kinetics and mechanisms of photocatalytic reactions. Photocatalyst engineering, especially of TiO2, is important due to various applications in photocatalytic processes. This review paper presents the engineering of materials and fabrication processes for TiO2 photocatalysts. Material catalyst engineering includes the development of TiO2 composites with magnetic materials, other additives, and doping. With the development of the chitosan-TiO2 coating to create the nanocomposite film, red grapes could be effectively protected against microbial infection and have their shelf life increased. F-doping on TiO₂ can increase the amount of photocatalytic oxidative species, encourage electron separation, and improve visible light absorption. To improve the effectiveness of removing the photocatalyst from the treated liquid waste once the procedure is finished, magnetic particles are added to photocatalysts. Fabrication methods for TiO2 modification to obtain specific crystal structures, including hydrothermal methods, anodization, and template-assisted techniques, will also be discussed. Another important factor is the duration of the hydrothermal treatment; nanotubes are generated after more than 12 hours. In contrast to diluted solutions, longer nanotubes will be produced during the Ti anodization process when concentrated electrolyte solutions, such as ethylene glycol and glycerol, are used.
Synthesis and Characterization of Carboxy Methyl Cellulose-Based Hydrogel Cross-linked with Citric Acid Pitaloka, Alia Badra; Rukmana, Alda Sadilillah; Nur’afiani, Tia Yufika
World Chemical Engineering Journal VOLUME 5 NO. 1 JUNE 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i1.12082

Abstract

Hydrogel is a three-dimensional hydrophilic polymer network which is capable of absorbing large amounts of water, urine, blood, and other biological fluids. The applications of hydrogel are present in various fields such as pharmaceuticals, agriculture, food, and medical fields. Hydrogel is used as a wound dressing, in a drug release system, in diapers, in and menstrual products. The purpose of this research is to produce carboxymethyl cellulose (NaCMC) hydrogels using citric acid as the crosslinking agent, and to determine the optimum conditions to produce hydrogels with a high absorption capacity of liquids using various concentrations of citric acid. The first step of this research is to mix NaCMC and citric acid by stirring it with an agitator at room temperature until the mixture becomes homogeneous. Then, the mixture is casted in a petri dish and dried for 24 hours at 30°C. Then, the crosslinking reaction was carried out at 80°C for a certain time. After that, the gels are put out of the petri dish and tested to determine their values of water absorption capacity (swelling) and gel fractions. Lastly, the hydrogels are characterized using FTIR and SEM. The results showed that the NaCMC hydrogel with anhydrous citric acid with 10%-wt is the best with 3779.16% swelling ratio and gel fraction of 60%.
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.
Development of Simple Kinetic Model on Biogas Production from Co-Digestion of Vinasse Waste and Tofu Residue at Variation of C/N Ratio Syaichurrozi, Iqbal; Rusdi, Rusdi
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10590

Abstract

The Generated Biogas Rate (GBRT) model and the Predicted Maximum Biogas Potential and Yield (PMBPY) model were developed in this work for better understanding of the anaerobic co-digestion of vinasse waste and tofu residue at variation of total carbon/total nitrogen (C/N) ratio which was 3.71, 5.26, 7.30, 32.54, 97.34. Rate constant (k (/day)) and biogas production rate (ū (mL/day)) estimated using GBRT model was 0.071, 0.140, 0.153, 0.150, 0.125 /day and 20.206, 101.393, 111.832, 95.967, 58.616 mL/day respectively for all variables (R2 of 0.925 – 0.976). The maximum biogas potential (Pm) obtained using PMBPY model for all variables was 335.8317, 737.0868, 760.4523, 608.3871, 523.3872 mL respectively (R2 = 0.914 – 0.972). The fitting error between measured biogas and predicted biogas through the developed model was 0.20 – 7.03 %. The developed kinetic model can predict biogas potential with prediction efficiency (%) over modified Gompertz model of 91.71 – 98.57%.
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.
Corrosion Analysis on AMS 4050 Aluminum Metal in an Extreme Acid Rain Environment by Weight Loss Method Arwati, I Gusti Ayu; Alva, Sagir; Fadilah, Arif; Maryani, Yeyen
World Chemical Engineering Journal VOLUME 5 NO. 2 DECEMBER 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i2.12613

Abstract

AMS 4050 aluminum metal which is a type of aluminum, with no Zn content, that composed of 5.7 - 6.7%Cu 2 - 2.6%, Mg 1.9 - 2.6%, Zr 0.15%, Si 0.15% and Mn 0.1% others 0.15% each. The advantage of aluminum is that it weighs only 2.7 gr / cm3, corrosion resistant, good electrical and heat transmitter, easy to fabricate or forge. This AMS 4050 material is widely used in the expansion industry to be used as an aircraft frame. MS 4050 aluminum is more resistant to cracking than other types of aluminum, however cracks can still occur due to corrosion due to acid rain. The test method used to calculate the corrosion rate is the weight loss method. The corrosion rate test results obtained with mean values for immersion of 1, 2, 3, and 4 weeks were 0.03, respectively; 0.07; 0.1 and 0.12 mg / cm2 h. EDX test results showed that the aluminum content in AMS 4050 metal decreased by 18.18%.
The Effect of Polypropylene and Low-Density Polyethylene Mixtures in the Pyrolysis Process on the Quantity and Quality of the Oil Products Suhendi, Endang; Heriyanto, Heri; Ammar, Muhammad; Tsania, Ayu; Anam, Muhammad Khairul
World Chemical Engineering Journal VOLUME 7 NO. 2 DECEMBER 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.v7i2.23121

Abstract

Plastic waste is a type of waste that has economic value when processed properly, one of which is by converting it into fuel oil using the pyrolysis method. Pyrolysis of plastic waste involves the decomposition of materials at high temperatures without the presence of oxygen. This study aimed to examine the effect of the mixture of polypropylene (PP) plastic waste and low-density polyethylene (LDPE) plastic waste in the pyrolysis process on the quantity and quality of the oil products. The ratio of PP:LDPE was varied to 100 kg : 0 kg, 70 kg : 30 kg, 50 kg : 50 kg, and 30 kg : 70 kg. The pyrolysis was conducted at a temperature of 350ºC for 10 hours. The research results show that the highest yield value of 82.24% wt. is obtained at PP:LDPE ratio of 100 kg : 0 kg. Furthermore, the best pyrolysis oil products are obtained at PP:LDPE ratio of 70 kg : 30 kg. The gasoline, kerosene, and diesel fuel products have densities of 760 kg/m3, 776.4 kg/m3, and 873 kg/m3, respectively. Then, the gasoline and diesel fuel have calorific values of 10,836 cal/g and 10,996.5 cal/g. The cetane number of diesel fuel is 42, while the octane number of gasoline is 78.9.
Study of Esterification Reaction Between Ethanol and Acetic Acid Using Homogeneous and Heterogeneous Catalyst Nuryoto, Nuryoto; Amaliah, Alin Rizka; Puspitasari, Anita; Ramadhan, Anggara Diaz
World Chemical Engineering Journal VOLUME 4 NO. 2 DECEMBER 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i2.8952

Abstract

The Ethyl acetate is the final product of esterification reaction between ethanol and acetate acid which usually used as a solvent. Catalysts are used to boost the esterification reaction rate, mostly the homogenous catalyst (acid liquid catalyst) is used. The use of homogeneous catalyst needs quite long process to separate, that is the reason why using the heterogeneous catalyst is the alternate way. The purpose of this research is to compare the performance of homogeneous catalyst (sulphuric acid) and heteregenous catalyst (natural zeolite from Bayah) by variating the factors that has an impact on reaction. The reaction was happened in batch reactor by variating the speed of agitation speed in range 500-700 rpm and the catalyst molecules size 60 mesh and 100 mesh for the solid catalysts. The goal of the variation is to maximize the reactant mass transfer to the active site of the catalyst. The result of this research shows that on the agitation speed of 700 rpm and 100 mesh Bayah natural zeolite is able to yield bigger conversion of acetate acid compared to using the sulphuric acid catalyst, which are 45.03% and 15.19% .
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.
ZEOLITE FOR AGRICULTURE INTENSIFICATION AND CATALYST IN AGROINDUSTRY Kurniawan, Teguh; Nuryoto, Nuryoto; Firdaus, Mochamad Adha
World Chemical Engineering Journal VOLUME 3 NO. 1 JUNE 2019
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v3i1.5507

Abstract

The role of renewable products is becoming important because the fossil resources in which most of our chemicals derived is vanishing. Agriculture as the renewable sources is needed to increase the production which is not only required to meet the food demands but also to replace chemicals that derived from fossil sources. Zeolite has a huge potential for agriculture intensification and conversion of agriculture products and by-products into chemicals. Indonesia has two kind deposit of natural zeolites, which are clinoptilolite and mordenite lies aligned volcanic mountain across Sumatra, Java, Nusa Tenggara and Sulawesi Islands. Zeolite has large surface area consisted of microporous and mesoporous structures. It could be utilized as an ion exchange agent, adsorbent and catalyst for applications in agriculture and agroindustry. Sustainable development of agricultural products could be also assisted by zeolite as slow-release fertilizer and controlling pests. Moreover, this review discusses about the integration of natural zeolite with chemical based wastes from livestock with nitrogen demand for cultivation is explained as a part of the idea of one-system-integrated farm and livestock. Storage and processing of agricultural products could be more efficient with the utilization of zeolite in drying, storage, processing and product preservation unit operations. Sucrose crystallization, catalytic reaction inulin to fructose, pinene isomerization and glycerol biodiesel by-product conversion is discussed in this review. As in general, zeolite porosity, topology, silicon to aluminium ratio, and acidity properties become an important factor on catalytic reactions to convert agricultural products into beneficial chemical substances

Page 7 of 9 | Total Record : 85

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