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Research In Chemical Engineering
Published by Universitas Muhammadiyah Purwokerto
ISSN : -     EISSN : 28294718     DOI : https://doi.org/10.30595/rice.v1i1
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Materials Science & Nanotechnology
RICE: Research in Chemical Engineering is a peer-reviewed open-access journal dedicated to the dissemination of chemical engineering and chemistry research and finding. This journal covers Research Articles, Review Articles, Short communication, and case studies Focus and Scope RICE: Research in Chemical Engineering is an open-access journal dedicated to the dissemination of chemical engineering and chemistry research and finding. This journal covers including Chemical process Water and waste treatment Material Technology Polymer Technology Membrane Technology Separation Technology Chemical Reaction Engineering and Catalysis Bioprocess Engineering Food Technology Health and Safety Work Applied Chemical Engineering Applied Chemistry Innovation in Chemistry Renewable Energy chemistry Chemical engineering education And another subject that related to chemical engineering
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 79 Documents
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Optimizing Konjac Glucomannan Hydrolysate (KGMH) as a Natural Binder in Foam Mat Drying for Functional Herbal Powder Drink Alwani Hamad; Zahwa Kinanti; Pachara Pomsang; Mubshair Naveed; Dwi Hartanti
Research in Chemical Engineering Vol. 4 No. 1 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i1.266

Abstract

Phytochemical-rich herbal beverages are typically perishable due to their liquid form. Powder conversion via foam mat drying offers improved shelf stability but requires effective natural binders. Konjac glucomannan (KGM) is a promising candidate, though its high viscosity necessitates enzymatic hydrolysis to produce functional konjac glucomannan hydrolysate (KGMH). This study investigated konjac glucomannan hydrolysate (KGMH) as a natural binder for foam mat drying of a herbal blend (Java tea, turmeric, and seed-under-leaf). The research optimized KGMH functionality by evaluating KGM source (Thailand vs. Indonesia), enzyme concentration (100–200 IU/g), and KGM concentration (10–30% w/v) on KGMH properties (viscosity, reducing sugar, total carbohydrate, and degree of polymerization (DP)), herbal drink powder characteristics (physical, phenolic, and flavonoid content, also antioxidant activity using DPPH and FRAP methods). The herbal powder was produced by mixing the herbal extract with KGMH to form a stable foam, followed by drying at 60°C for 12 hours and grinding into powder. Results demonstrated that Enzymatic hydrolysis significantly reduced KGMH viscosity and DP, while increasing reducing sugars, with Indonesian konjac yielding higher viscosity than Thai konjac, and higher KGM concentrations increasing viscosity but requiring greater enzyme levels for effective depolymerization. The herbal drink using binder from Thai KGMH at 200 IU/g enzyme and 20% KGM concentration produced the highest retention of total phenolic content (2.83 mg GAE/g), total flavonoids (3266.52 mg QE/g), and antioxidant activity (93.53 mM TE/g by FRAP) in the herbal drink powder
Synthesis of Glycerol Carbonate and Kinetic Modeling Using ZnBr2 Catalyst Agnes Febrianti; Sonia Sembiring; Heri Rustamaji; Herti Utami
Research in Chemical Engineering Vol. 4 No. 1 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i1.268

Abstract

The rapid expansion of biodiesel production in Indonesia has resulted in a surplus of glycerol as the main by-product, which has significantly decreased its market value. To increase its economic potential, glycerol can be converted into one of its value-added derivatives such as glycerol carbonate. The purpose of this study was to obtain the best conditions for the reaction and to model the reaction kinetics. The reaction was carried out using the urea carbonylation method with glycerol to produce glycerol carbonate and ammonia. The resulting samples were analyzed using iodometric titration analysis. This study focuses on the kinetic modeling of the synthesis of glycerol carbonate from glycerol and urea using ZnBr₂ as a catalyst under optimal conditions. The highest glycerol conversion was achieved at a temperature of 130°C, the addition of 5% catalyst by weight, and a reaction time of 300 minutes, resulting in a conversion rate of 52.74%. Based on the kinetic model analysis, the first-order reversible nonelementary model can be selected as the best model to describe the overall reaction kinetics. This model provides the best balance between prediction accuracy (smallest SSE value), which is 4.42×10⁻⁷, consistency with kinetic theory (k value increases with increasing temperature), which are 0.0028, 0.0038, and 0.0042 at each temperature, namely 110°C, 120°C, and 130°C, respectively. The realistic physical parameters of A and Ea values are 10.5909 s-1 and 26.1417 kJ/mol.
Characterization and Treatment Pharmaceutical Wastewater by Photo-Fenton Process Endang Kusumawati; Bunga Liswandila; Erisca Saputri; Tifa Paramitha
Research in Chemical Engineering Vol. 4 No. 1 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i1.269

Abstract

The characteristics of the PT X pharmaceutical wastewater influent were a pH of 7.18, a COD of 384 mg/L, and a red-brown color. The Chemical Oxygen Demand (COD) has not met the quality standards based on the Ministry of Environment and Forestry Regulation No. 5 of 2014. The red-brown color was caused by wastewater containing rifampicin as a component of the tuberculosis drug. The objectives of this study were treating the real pharmaceutical wastewater to reduce COD and color by varying the molar ratio of the Fenton reagents and to identify the influence of the neutralization process. The Fenton reagents were FeSO4.7H2O and H2O2 with a molar ratio of 1:1.5, 1:2, and 1:3. The process was conducted with the help of UV light and acidic conditions. The photo-Fenton process produced residues, which can be neutralized by using 0.1 NaOH solution and coagulated by using NaCl. The neutralization process successfully decreases the amount of Fe, H2O2, and COD on liquid. The results showed that the best molar ratio is 1:2, which can be seen from the removal efficiency of organic compounds of 89.58%, and the color decrease is seen from the decrease in absorbance value.
Non-Spherical Polymeric Nanoparticles : Synthesis and Applications Sri Agustina; Hadi Wahyudi; Marta Pramudita; Alia Badra Pitaloka
Research in Chemical Engineering Vol. 4 No. 2 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i2.270

Abstract

Non-spherical polymeric nanoparticles have emerged as a promising functional materials due to their distinctive physicochemical properties and enhanced performance in various applications. The morphologies of nanoparticles play a critical role in determining their biological and chemical behavior, especially in targeted delivery and interaction with complex environments. Advances in synthesis techniques now allow precise control over particle morphology, enabling the production of polymeric nanoparticles in various morphologies such as rods, discs, and ellipsoids. This review highlights recent developments in the synthesis methods of non-spherical polymeric nanoparticles and explores their expanding range of applications, with a focus on their potential as nanocarriers in biomedical, agricultural, and industrial fields.
The Role of Artificial Intelligence in Enhancing Heavy Metal Removal Efficiency: A Bibliometric Perspective Moh Azhar Afandy; Fikrah Dian Indrawati Sawali
Research in Chemical Engineering Vol. 4 No. 2 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i2.272

Abstract

The problem of heavy metal pollution in wastewater has prompted the demand for more effective and sustainable treatment systems. In the recent decade, the integration of artificial intelligence (AI) in heavy metal adsorption processes has shown tremendous potential in enhancing efficiency and optimizing operational parameters. This study intends to identify global research trends on the application of AI in optimizing heavy metal adsorption processes by a bibliometric method for the period 2010 to 2024. Data were acquired from Google Scholar and filtered to include indexed papers, then analyzed using VOSviewer and Microsoft Excel software to evaluate annual publishing trends, as well as visualization of keyword co-existence. The findings of the investigation showed an impressive move in publications after 2019. The leading terms detected included “machine learning,” “neural networks,” and “optimization.” Despite demonstrating encouraging trends, research in this subject still confronts hurdles such as inadequate large-scale experimental data, minimal integration of AI with Internet of Things (IoT) systems, and lack of industrial-scale applications. This study shows the need of building hybrid AI-IoT systems, using big data analytics, and adaptive predictive models to increase the effectiveness of heavy metal adsorption systems in the future. These findings are likely to be a key reference for researchers and practitioners in creating smart and sustainable waste processing systems.
Analysis of The Effectiveness of the Wastewater Treatment Installation and The Quality of Liquid Waste at XYZ Hospital in Cilegon City Safril Kartika Wardana; Syariful Maliki; Fikri Maulana; Dadi Cahyadi
Research in Chemical Engineering Vol. 4 No. 2 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i2.290

Abstract

WWTP in Cilegon City demonstrates a strong commitment to controlling environmental pollution through the operation of its Wastewater Treatment Plant (WWTP). This study aims to evaluate the quality of treated effluent and assess the effectiveness of the WWTP in reducing key pollution parameters: Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), and free ammonia (NH₃-free). Wastewater samples were collected from the WWTP inlet every three months and from the outlet monthly, each consisting of 2 liters, and analyzed in accordance with Indonesian environmental standards (PERMENLH No. 5 of 2014). The analysis showed that the treated effluent met regulatory quality standards, with pollutant removal efficiencies reaching 96.55% for TSS, 87.28% for BOD, 79.86% for COD, and 99.76% for NH₃-free. These findings indicate that the WWTP functions effectively, with high removal efficiency for both organic and inorganic pollutants, thus ensuring compliance with environmental regulations and highlighting its success as a model for Hospital wastewater management.
Analysis of Combustion Quality on Auxiliary Boiler Performance Using Heat Loss Method Elli Prastyo; Tegar Regi Setiawan; Farkhatus Solikha
Research in Chemical Engineering Vol. 4 No. 2 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i2.300

Abstract

Boiler is one type of vessel that is closed and has the main function as a means of converting energy from water into steam / steam. A good combustion process is able to produce a minimal amount of flue gas and is able to increase thermal efficiency. The value of efficiency is important because it can save operating costs and increase product productivity in auxiliary boilers. This report is based on direct observations to the company PT Trans-Pacific Petrochemical Indotama. Data collection is carried out through interviews and boiler operational logsheet data collection. The research activities will be carried out on January 2 – February 28, 2023. The purpose of this study is to determine the performance of auxiliary boilers in terms of thermal efficiency and combustion reactions that occur using the heat loss method. The variables used in this study are fuel gas flow rate, theoretical air requirements, O2 excess value, flue gas temperature, and efficiency in auxiliary boilers at PT TPPI. The results of actual data and calculations per six days in one month in January 2023 obtained an average value of fuel gas of 4544.34 m3 / hr, theoretical air of 140658.02 m3 / hr, flue gas of 54964.83 m3 / hr, and the average value of thermal efficiency in auxiliary boilers is 63.44%. The results showed that the thermal efficiency value of PT TPPI's auxiliary boiler was still suitable for use with an efficiency value standard set above 60%.
Innovation in Catalytic Converters for Motorcycles in an Effort to Reduce Air Pollution from Combustion Silvia Ekasari; Eva Weddakarti; Ahsani Maulidina
Research in Chemical Engineering Vol. 4 No. 2 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i2.303

Abstract

Air pollution remains one of the most challenging environmental issues. Motor vehicle exhaust gases contribute around 70%–80% of air pollution, while industrial activities contribute only 20%–30%. Exhaust emissions from incomplete combustion include carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and lead (Pb), which are harmful to health and the environment. One promising solution is the installation of catalytic converters. This study investigates the effectiveness of catalytic converters made of stainless steel coated with chromium and copper in reducing emissions from motorcycle exhaust systems. The experimental results show that the catalytic converter significantly reduced harmful gases: CO decreased by 44%, HC decreased by 63.65%, while CO₂ increased from 7.1% to 11.2%, indicating successful oxidation. These findings highlight the catalytic converter’s role in reducing harmful emissions and its potential to mitigate air pollution from motorcycles.
Recent Advances in Green Synthesis of TiO₂ Nanoparticles: Mechanisms, and Applications Devi Lestari; Imas Masriah
Research in Chemical Engineering Vol. 4 No. 2 (2025): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v4i2.316

Abstract

Green synthesis of titanium dioxide (TiO₂) nanoparticles has emerged as a sustainable alternative to conventional chemical methods, offering environmental benefits while maintaining superior performance characteristics. This comprehensive review examines recent advances in plant-mediated synthesis of TiO₂ nanoparticles, focusing on synthesis mechanisms, structural properties, and diverse applications. Various biological extracts including leaf extracts (Inula viscosa, Aloe vera, Jatropha curcas), flower extracts (Jasminum, Magnolia champaca), fruit peels (Solanum melongena, Citrus sinensis), and agro-industrial wastes have been successfully employed as bio-reductants and stabilizing agents. The synthesis mechanisms involve complex redox reactions mediated by phytochemicals such as polyphenols, flavonoids, terpenoids, and alkaloids, which serve dual roles as reducing agents and capping ligands. Characterization studies reveal that green synthesis predominantly yields anatase phase TiO₂ with particle sizes ranging from 6-400 nm, depending on the plant source and synthesis conditions. The biogenic nanoparticles demonstrate exceptional photocatalytic performance, achieving complete dye degradation (>99%) within 60 minutes under UV irradiation and enhanced visible light activity compared to conventional TiO₂. Noble metal doping (Au, Ag) further improves performance, with Au/TiO₂ nanocomposites showing 2.5 times higher activity than commercial P25 and remarkable hydrogen evolution rates (468 μmol H₂, 9.3% quantum yield). Applications span environmental remediation, renewable energy production, antimicrobial treatments, and advanced technologies including dye-sensitized solar cells, lithium-ion batteries, and corrosion protection coatings. Despite promising results, challenges remain in batch-to-batch variability and large-scale production standardization. This review consolidates current progress and identifies future research directions toward sustainable, high-performance TiO₂ nanomaterials for environmental and energy applications.

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