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Iqbal Syaichurrozi
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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 8 NO. 2 DECEMBER 2024" : 6 Documents clear
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.

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