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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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Simulation a Couple of Exothermic and Endothermic Syngas Processes in a Catalytic Plate Reactor Safari, Masoud; Towfighi, Jafar; Torkian, Mohammad
World Chemical Engineering Journal VOLUME 6 NO. 1 JUNE 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v6i1.14577

Abstract

This paper studies an efficient way to produce syngas from the methane couple reforming and partial methane oxidation by utilizing a catalytic plate reactor. Methane steam and dry reforming as endothermic reactions are coupled with partial methane oxidation as an exothermic reaction in a catalytic plate reactor, which is simulated using detailed reaction kinetics, mass, and energy balances. The impact of inlet temperature, composition, and velocities on the reforming and partial oxidation channels, and also the resulting methane conversions, is studied. In addition, the H2/CO ratio is evaluated for both endothermic and exothermic sides across varied feed ratios. Co- and counter-flow arrangements are simulated for catalytic plate reactors, and their impact on temperature distribution and methane conversion is studied. The suitable plate dimensions, in particular, plate length, are computed during this simulation. Applying a metal plate, Co- and counter-flow arrangements are simulated for catalytic plate reactors, and their impact on temperature distribution and methane conversion is studied. During this simulation, the appropriate plate dimensions, particularly plate length, are determined. The use of a metal plate with a greater thermal conductivity allows for effective heat transmission between endothermic and exothermic channels, resulting in outstanding temperature distribution and slight temperature differences. 
The Effect of HCl Concentration on The Activation of Bentonite as A Catalyst in The Pyrolysis Process of Polypropylene (PP) Plastic Waste at The Integrated Waste Management Facility of Asari Cilegon Suhendi, Endang; Heriyanto, Heri; Anam, Muhammad Khoirul; Aulia, Anida; Putri, Rizki Amalia; Wardalia, Wardalia
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.v8i1.26466

Abstract

Pyrolysis is the process of heating a substance without the presence of oxygen, causing the decomposition of plastic materials (polymers). Pyrolysis is used as an alternative to reduce the amount of plastic which is a source of environmental problems. This research aimed to determine the effect of HCl concentration on bentonite catalyst activation on the liquid product yield of pyrolysis of polypropylene (PP) plastic waste and to determine the characteristics of the liquid pyrolysis products. This research was carried out in several stages including raw material preparation, catalyst activation, and pyrolysis process. In bentonite catalyst activation, the HCl concentration was varied to 0.25, 0.50, and 0.75 M. The results showed that the highest liquid product yield was obtained at a concentration of 0.50 M, namely 76% with a product density range of 0.7452-0.762 g/ml. The heating value of the liquid product at 0.50 M HCl activated bentonite was 6806.48 cal/g. Through GC-MS analysis, the liquid product contained 2,4-Dimethyl-1-heptene with an area of 8.21% and a retention time of 3.626. Based on XRD analysis, the bentonite contained minerals of montmorillonite, kaolinite, and quartz.
Kinetic Study of Ammonium Desorption using Natural Zeolites from Cikalong Abdusattar, Thareqa; Hadi, Abdul; Nuryoto, Nuryoto; Kurniawan, Teguh
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.v5i1.12103

Abstract

Household liquid waste which contains ammonium is one of the major contributors to the wastewater effluent. The aim of investigation is to characterize and determine the adsorption capacity of natural zeolites from Cikalong for ammonium removal.  The effect of cations type, K+, Mg2+ and Ca2+, on ammonium desorptions was studied. Kinetic desorption study was also performed and fitted with various kinetic models. According to X-ray diffraction (XRD) pattern, the Cikalong natural zeolites were mordenite and clinoptilolite dominant type.  The morphology of the mordenite phase was appeared as needles shape. The ratio of Si to Al was 6.86 according to X-ray fluorescence (XRF). The surface area was 187 m2/g which was determined by Brunauer–Emmett–Teller (BET) model. Desorption using K+ solution showed the shortest time and the highest rate for ammonium desorption. The calculation using nonlinear method was carried out to optimize the desorption kinetic parameters. The pseudo 1st order desorption kinetics model showed the smallest error with sum of squared error (SSE) 0.00209.
Effect of Bio-Coating Material Concentration of Rice Husk Extract (Oryza Sativa) and Damar Resin (Agathis Dammara) on Reducing Corrosion Rates in H2SO4 Solutions Pramudita, Marta; Zayadi, Adi; Pitaloka, Evi Diah; Rochmat, Agus; Pitaloka, Alia Badra; Agustina, Sri
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.30154

Abstract

Corrosion is one of the main problems in industry, especially in cooling systems, refinery units, pipelines, chemicals, oil and gas production units, boilers and water processing, paints, pigments, lubricants, and others. The use of inhibitors has been proven to reduce the rate of corrosion. Still, it is limited by long-term stability, so it is necessary to provide other protection for mild steel, namely coating the metal with a coating material. Coating is the process of covering base material to protect the material from corrosion and provide protection to the material. The silica contained in rice husk extract and damar resin has the potential to be good bio-coating. This research aims to determine the effect of damar resin concentration on the corrosion rate and corrosion rate efficiency. The method used in this research uses several methods, one of which is the weight loss method. The resin and silica sol obtained from ashing rice husks are mixed to form a homogeneous product. Metal samples that have been coated with bio-coating material are soaked in 1 M sulfuric acid solution, with varying resin concentrations of 25, 50, and 75 gr with immersion times of 1, 2, and 3 hours, and at temperatures of 30, 40, 60, and 80 °C, which was then tested for the capability of the bio-coating material. This research obtained the highest corrosion rate value of 0.8860 mmpy using a temperature of 80˚C and a immersion time of 3 hours, with a corrosion efficiency value of 62.96%. Meanwhile, the lowest corrosion rate was 0.2143 mmpy at a temperature of 30˚C and a immersion time of 1 hour, with a corrosion efficiency value of 85.71%.
Eco-Friendly Transformation and Energy Efficiency in Methanol-to-Olefins (MTO) Processes: Innovations Toward Sustainable Olefin Production Heriyanto, Heri; Rochmat, Agus; Suhendi, Endang; Pujiastuti, Hendrini; Wardalia, Wardalia; Kanani, Nufus
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.30231

Abstract

Uncertainty regarding global crude oil prices has raised concerns for industry players, including the intermediate chemical industry such as olefins. The possibility of oil prices rising unpredictably makes the production of olefins from naphtha less attractive. On the other hand, abundant reserves of coal and natural gas are being considered as the foundation for developing the olefin industry based on gasification processes. The process routes include the formation of synthetic gas (SynGas) consisting of Hydrogen and Carbon Monoxide (H2 and CO), Methanol production from SynGas, and Olefin production from Methanol (MTO). This review aims to provide an overview of MTO and future developments related to the diversification of processes and technologies for the commercial production of olefins. Current research development on the Methanol-to-Olefins (MTO) process has narrowed down to three main areas, including: (1) Catalyst modification to increase reaction yield (particularly C2 and C3 products), (2) Determination of detailed reaction mechanisms in olefin formation, and (3) Catalyst deactivation processes in MTO.
Review: Biogas Production from Rice Husks Astria, Windi; Putri, Ratih Ramadhani; Fattah, Hanif Al; Suhendi, Endang; Syaichurrozi, Iqbal
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.29811

Abstract

For Indonesians, rice is a basic diet. Rice husks, a waste product of the milling process used to turn paddy into rice, have a great potential for conversion into raw materials for biogas. Several factors that affect the rate of biogas production are the initial treatment (pre-treatment), temperature, acidity (pH), total solid content (TS), and C/N ratio, this is done to help the degradation process of lignin and cellulose can run quickly which has an impact on increasing biogas production. The development of biogas from rice husk waste has significant promise for Indonesia since it can help reduce the country's rice husk waste stockpile and could eventually become one of the country's primary alternative energy sources.
Advances in Photocatalytic Nanocomposite Technology: Synthesis and Applications Pujiastuti, Hendrini
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.30235

Abstract

In wastewater treatment in particular, photocatalytic nanocomposites have shown great promise as a remedy for environmental contamination. Through the improvement of charge separation and the expansion of the spectral sensitivity to visible light, the synthesis of nanocomposites—which usually combine metal oxides like ZnO or TiO₂ with materials like carbon nanostructures or noble metals—improves photocatalytic performance. Sol-gel, hydrothermal, ion-exchange, and intercalation are some of the synthesis techniques that have been used to create these nanocomposites; each has its own advantages in terms of structural control and photocatalytic activity. Organic contaminants, including colors and medicinal chemicals, can be effectively degraded by photocatalytic nanocomposites. This overview covers the basic ideas of photocatalysis, how to create nanocomposite materials, and the latest developments in using photocatalytic nanocomposites for environmental cleanup. Making use of these resources provides a green, efficient, and sustainable approach to water purification, with future research focusing on improving their stability and scalability for industrial applications.
Diffusion and Relaxation Kinetics of Chitosan-graft-poly (Acrylic Acid) Hydrogels: A Theoretical and Experimental Study Jayanudin, Jayanudin; Lestari, Retno S. D.; Barleany, Dhena Ria; Pitaloka, Alia Badra; Yulvianti, Meri; Prasetyo, Dimas
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.29920

Abstract

Hydrogels, as three-dimensional polymer networks, are extensively utilized due to their ability to absorb significant amounts of water while remaining insoluble. Chitosan-grafted poly(acrylic acid) hydrogels, in particular, combine high water absorption with improved mechanical properties, making them ideal for applications in agriculture and drug delivery. This study investigates the swelling kinetics of chitosan-graft-poly(acrylic acid) hydrogels synthesized with varying concentrations of the crosslinker N,N'-methylenebisacrylamide (MBA). The objective is to establish the relationship between crosslinker concentration and hydrogel performance by evaluating their swelling behavior using kinetic models. The hydrogels were prepared via free-radical polymerization, with MBA concentrations of 0.015 g (Hgel 1), 0.05 g (Hgel 2), and 0.1 g (Hgel 3). The research results indicate that swelling increases as the MBA concentration decreases. This was attributed to the lower crosslinking density, which reduces the entanglement of polymer chains. Hgel 1 displayed the greatest swelling ratio 171.71 g/g, while Hgel 2 150.21 g/g and Hgel 3 144.76 g/g. The research results indicate that the swelling behavior is best described by the diffusion kinetics model, as evidenced by the best fit between the experimental data and calculations, with R² values of 0.996, 0.996, and 0.984 for Hgel 1, Hgel 2, and Hgel 3, respectively. The applicability of pseudo-second order model, in good agreement with the one found for Hgel 2 (R2 = 0.997). These results suggest that diffusion dominates the swelling behaviour and that hydrogel behaviour is sensitive to crosslinker concentration. This work highlights the potential use of chitosan-graft-poly(acrylic acid) hydrogels for sustainable applications in agriculture and biomedicine.
Evaluating Emulsion Dynamics: The Role of Surfactants and Mixing Conditions in Non-Baffled Configurations Kanani, Nufus; Kustiningsih, Indar; Wardhono, Endarto Yudo; Wardalia, Wardalia; Heriyanto, Heri; Adiwibowo, Muhammad Triyogo; Rusdi, Rusdi; Hartono, Rudi; Demustila, Harly; Damayanti, Demietrya Renata Sashi; Maulida, Alyssa Shafira; Priyatna, Aufa Irsyad
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.30085

Abstract

The study investigates the impact of surfactant concentration and mixing time on the physical properties and stability of emulsions in non-baffle mixing systems. Surfactants, known for their ability to reduce interfacial tension, play a pivotal role in enhancing emulsion stability by promoting uniform droplet dispersion and reducing coalescence. Experiments were conducted using varying surfactant concentrations (0, 5, and 10 mL) to evaluate their effects on key parameters such as density, viscosity, Reynolds number, emulsion height, and stability over time. The results revealed that higher surfactant concentrations significantly improved emulsion uniformity and stability, with the 10 mL concentration yielding the most consistent outcomes. However, the absence of baffles introduced challenges, including prolonged mixing times and stratification tendencies, underscoring the need for optimized mixing configurations. These findings have practical implications for industries reliant on stable emulsions, highlighting the importance of balancing surfactant concentration and mixing dynamics to achieve efficient and cost-effective processes.
Kinetic Analysis of Biogas Production from Poultry Manure Waste using Gompertz, Transference, and Logistic Models Ibrahim, Achmad Faizal; Najiyah, Elisa Restu Dian; Abigail, Mohamad Farrel; Satria, Muhamad Ariel; Syaichurrozi, Iqbal
World Chemical Engineering Journal VOLUME 9 NO. 1 JUNE 2025
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v9i1.33624

Abstract

Biogas production through anaerobic fermentation is a promising renewable energy alternative that continues to gain attention. To improve the accuracy and efficiency of production predictions, kinetic modeling approaches that describe the underlying biological processes are essential. This study compares three kinetic models Gompertz, Logistic, and Transference in predicting biogas production under varying pH conditions, with the aim of identifying the model that best represents the experimental data. The models were evaluated based on parameters including maximum production capacity (Ym), maximum production rate (U), lag time (λ), and prediction errors quantified by the sum of squared errors (SSE), root mean square error (RMSE), and coefficient of determination (R²). The results demonstrate that the Transference model consistently outperforms the other models. At neutral pH (pH 7), the Transference model predicted a maximum biogas production of 2127.11 cm³, a maximum daily production rate of 158.23 cm³/day, a short lag phase of 0.947 days, a low SSE value of 3223.45, and an R² value of 1.000, indicating an excellent fit to the experimental data. Compared to the Gompertz and Logistic models, the Transference model exhibited greater stability, accuracy, and realism in representing the biogas production process. These findings indicate that the Transference model is a reliable predictive tool for the design and optimization of biogas production systems, particularly under optimal pH conditions.

Page 8 of 9 | Total Record : 85

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