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Journal of Chemical Engineering Research Progress
Published by Universitas Diponegoro
ISSN : -     EISSN : 30327059     DOI : https://doi.org/10.9767/jcerp
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Energy Engineering Materials Science & Nanotechnology
The Journal of Chemical Engineering Research Progress (e-ISSN: 3032-7059; Short Abbreviation Title: J. Chem. Eng. Res. Prog.) is an international research journal and invites contributions of original and novel fundamental research. The JCERP journal aims to provide an international forum for the presentation of original fundamental research, interpretative reviews and discussion of new developments in chemical engineering discipline. Papers which describe novel theory and its application to practice are welcome, as are those which illustrate the transfer of techniques from other disciplines, including: fundamentals of chemical engineering; advanced materials related to chemical engineering; applied/industrial chemistry; chemical reaction engineering kinetics; chemical reactor design and optimization; chemical engineering process design and computation; etc. related to chemical engineering discipline.
Arjuna Subject : Teknik Kimia (semua kategori) - Kimia Proses dan Teknologi
Articles 112 Documents
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Elemental Sulfur as a Catalyst Precursor for Gas-Liquid Heterogeneous Chlorination of Acetic Acid: Kinetics and Optimization for Enhanced Monochloroacetic Acid Selectivity and Productivity Kwang Il Wi; Ri Myong Kim; Tae Hun Ryo; Song Chol Ri; Nam Chun Kim; Hak Chol Han; Un Chol Han; Hae Song Choe; Kwang Won Ri
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20704

Abstract

Monochloroacetic acid (MCA) is a pivotal intermediate in agrochemicals and pharmaceuticals, but its industrial synthesis via acetic acid chlorination faces challenges related to selectivity and reaction time．According to literature reports, in conventional processes, MCA selectivity is typically 70-85% at 80-90% conversion, and reaction time is 25-35 hours. This study investigates the kinetics of gas-liquid heterogeneous acetic acid chlorination using elemental sulfur as a catalyst precursor to establish a scientific basis for process optimization. A consecutive-parallel reaction mechanism was proposed incorporating acetic acid consumption, acetyl chloride conversion, MCA formation, and dichloroacetic acid (DCA) formation. Kinetic parameters were determined at 353, 363, 373, and 383 K in a steel bubble column reactor with fixed initial sulfur concentration (1.92 mol.L-1) and Cl₂ space velocity (4.028 L.L⁻¹.h⁻¹). The activation energy for DCA formation (87.55 kJ.mol⁻¹) was substantially higher than that for MCA accumulation (52.40 kJ.mol⁻¹). Relative rate analysis revealed that k₃/k₄ decreases continuously from 1.83 at 353 K to 0.76 at 383 K, confirming that lower temperatures favor MCA selectivity. When the low-temperature (353K) operation strategy proposed in this study is applied, selectivity can be improved to approximately 88-92% (a 15-20 percentage point improvement compared to conventional processes). By applying the optimal temperature-time profile, the reaction time can be reduced to approximately 20-22 hours (a 25-35% reduction compared to conventional processes). The proposed kinetic model showed excellent agreement with experimental data (R² > 0.98). Based on the kinetic analysis, three optimization strategies were derived: maintaining high acetic acid concentration, dynamic adjustment of Cl₂ feed rate, and implementation of a decreasing temperature-time profile. This work provides a scientific basis for optimizing industrial MCA synthesis using low-cost sulfur as a catalyst precursor. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Process Simulation and Optimization of Propane Dehydrogenation over Pt-Sn/Al₂O₃: A Langmuir-Hinshelwood Approach Kemas Muhammad Fachmi Alfarabi; Flantino Setiawan; Muhammad Adlan Luqman; Maryam Hilaifa Hanani; Praditya Rizky Haribowo; Jon Saul Malau
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20713

Abstract

Propane dehydrogenation (PDH) has emerged as a critical process for propylene production due to increasing global propylene demand and limitations of conventional methods such as steam cracking and fluid catalytic cracking. This study develops a kinetic model for propane dehydrogenation over a Pt-Sn/Al₂O₃ catalyst using a Langmuir–Hinshelwood Hougen Watson (LHHW) framework, wherein the second hydrogen abstraction step is assumed to be the rate-determining step. The kinetic model incorporates non-dissociative propane adsorption, competitive adsorption of propane, propylene, and hydrogen, as well as reverse reactions and catalyst deactivation associated with coke formation. The model was implemented in Aspen Plus/HYSYS using a plug flow reactor (PFR) under steady-state, isothermal conditions. Operating parameters included temperatures of 823–923 K, pressures of 1–5 bar, and feed ratios ranging from 1:0 to 1:2. Base-case simulation results revealed extremely low propane conversion on the order of 10⁻⁸, indicating significant kinetic limitations despite the endothermic heat duty of approximately –6.78 × 10⁴ kJ/h. A temperature sensitivity analysis conducted between 760 °C and 1000 °C showed no improvement in conversion with increasing temperature; instead, a slight decreasing trend was observed. This anomaly suggests that adsorption effects dominate under the Langmuir–Hinshelwood formulation, and that the selected kinetic parameters may be inadequate for the simulated temperature range. The results indicate that temperature variation alone is insufficient to enhance reactor performance. Further model refinement is required, including re-evaluation of kinetic parameters (pre-exponential factor and activation energy), adjustment of adsorption constants, consideration of non-isothermal reactor behavior, and increased catalyst loading or residence time. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Br-LMG/PVB Film: A Novel UVC Dosimeter for Process Monitoring in Chemical and Environmental Engineering Guk Chol Kim; Kye Ryong Ri; Song Taek Kim; Jong Hyok Kim
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20725

Abstract

In chemical engineering processes such as photocatalytic wastewater treatment, cooling water biofouling control, and filling line surface sterilization, confirming UVC dose is critical for process efficiency and safety. However, existing UVC dosimeters rely on complex equipment, acid generators, or high cost, limiting field deployment. This study fabricated a UVC dosimeter based on polyvinyl butyral (PVB) film containing bromo-leuco malachite green (Br-LMG) without any acid generator, and evaluated its dosimetric characteristics for 253.7 nm dose monitoring. Br-LMG/PVB films were prepared by spin-coating and irradiated with UVC doses of 0, 25, 50, 75, 100, 200, and 300 mJ/cm². Changes in optical density, dose-response linearity, post-irradiation stability (30 min and 30 days), and colour difference (ΔE) based on CIE L*, a*, b* were quantified using UV-VIS spectrophotometry and reflectance spectroscopy. Upon UVC irradiation, the film exhibited a maximum absorption peak at 630 nm corresponding to the oxidized form of malachite green. The dose-response curve showed excellent linearity (R² ≈ 1) over 0-300 mJ/cm² with sensitivity of 0.0031 (mJ/cm²)-¹ at 630 nm. After 30 days of room-temperature storage, optical density increased by only 5.2-9.2% without fading. ΔE exceeded 10 at 25 mJ/cm² (perceptible) and reached 18 at 50 mJ/cm² (clearly distinguishable by naked eye). The Br-LMG/PVB film serves as a simple, low-cost, field-deployable UVC dosimeter requiring no additional equipment for dose assessment in chemical and environmental engineering applications. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
A Comprehensive State Monitoring System for Lime Shaft Kilns Based on Fuzzy Logic and Improved GMDH Algorithm Jong Nam Kim; Hong Yon Han; Chun Bae Ma; Yong So; Ryong Hyok Ri; Chung Hyon Hwang
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20741

Abstract

Efficient and environmentally friendly operation of lime shaft kilns requires accurate real-time monitoring of calcination zone status and flue gas composition. This paper concerns on an integrated monitoring system that combines fuzzy logic and an improved Group Method of Data Handling (GMDH) algorithm. First, 18-rule-based fuzzy logic diagnostic model identifies the operational state of the calcination zone with 94.2% accuracy. Second, an enhanced GMDH algorithm with novel data preprocessing and feature selection mechanisms serves as a soft sensor for predicting CO₂, CO, and O₂ concentrations. Experimental results from a 10,000-ton/year vertical lime kiln demonstrate that the improved GMDH achieves mean absolute errors of 1.5% for CO₂, 2.9% for CO, and 3.0% for O₂, representing a 43.2% improvement over conventional methods. Field application shows 8.3% reduction in fuel consumption and 15.2% reduction in CO emissions, confirming the system's practical value for industrial process optimization. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Electrochemical Behavior of Dysprosium in [EMIm]DCA Ionic Liquid Electrolyte Kyong Mun Choe; Pyong-Hun Kim; Gun-Se Jo; Kum-Hyok Choe; Chol-Su Ri; Hyon-Ho Ju
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20746

Abstract

The electrochemical behavior of dysprosium (Dy) in 1-ethyl-3-methylimidazolium dicyanamide ([EMIm]DCA) ionic liquid containing DyCl₃ was comprehensively studied using cyclic voltammetry (CV), chronoamperometry (CA), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). Cyclic voltammetric measurements revealed that the reduction of Dy³⁺ ions to metallic Dy is an irreversible process controlled by the diffusion of Dy³⁺ species, with an average charge transfer coefficient of 0.3898. Chronoamperometric data confirmed the one-step multielectron reduction mechanism of Dy³⁺ and the diffusion-controlled nature of the electrode process. The diffusion coefficient of Dy³⁺ calculated from CV measurements was determined to be 2.08 × 10⁻⁷ cm².s⁻¹, which is in good agreement with the value derived from CA curves. XRD analysis confirmed the formation of metallic Dy with a preferential orientation along the (002) crystallographic plane. SEM and EDS observations demonstrated the feasibility of dysprosium electrodeposition in the [EMIm]DCA ionic liquid electrolyte, with the obtained deposits exhibiting a characteristic microgranular morphology. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Valorization of Waste Polyethylene Terephthalate as a Functional Binder for Ballpoint Pen Ink: A Circular Economy Approach Ri Myong Kim; Jun Hyok Oh; Il Song Ryang; Jong Nam Kim; Yong Il Kim; Guk Chan Kim; Kuang Min Ho; Kum Hyok Ju; Ryong Chol Son
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20739

Abstract

The global accumulation of polyethylene terephthalate (PET) waste poses a serious environmental challenge, and the stationery industry remains dependent on virgin petrochemical binders for ballpoint pen inks. This study presents a sustainable upcycling approach that converts waste PET into a functional ink binder. PET bottles were chemically depolymerized via glycolysis with glycerol using zinc acetate as a catalyst. The reaction conditions were systematically optimized, yielding the following optimal parameters: a PET-to-glycerol mass ratio of 1:1.1, 0.6 wt% catalyst, 230 °C, and 4 hours of reaction time. The resulting oligomeric resin (number-average molecular weight, Mn ≈ 1,800 g/mol) was confirmed by FT-IR, GPC, and HPLC. The depolymerization product was formulated into a black ballpoint pen ink with nigrosine dye as the colorant and phenol as the solvent. The optimal formulation (binder:phenol:nigrosine = 7:2:1, plus 0.8 wt% Span-80) exhibited excellent performance: appropriate viscosity, a drying time of ≤19 seconds, reliable temperature resistance from –20 to 40 °C, strong UV resistance of ≥72 hours, and extended storage stability of ≥340 days. All properties met or exceeded industry standards. This work demonstrates a practical, cost-effective, and sustainable route for upcycling PET waste into a high-value stationery product, reducing plastic pollution while replacing petrochemical binders. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Study on the Model Prediction Control and MRAS in Electrodeposited Process Control System for Vehicle Painting Jo Hyok; Pak GumHyok; Ri CholMan; Han GuangJin; Kim Jong Chol; Ri Gi Song
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20731

Abstract

Electrodeposition is widely used in automotive painting due to its high adhesion and uniform coating. Temperature control is critical for coating quality, but stirred tanks exhibit nonlinear dynamics with large inertia and time-varying parameters. This study aims to develop an integrated control strategy combining model predictive control (MPC) with a model reference adaptive system (MRAS) to improve temperature control accuracy and robustness in a stirred electrodeposition tank. A robust MPC with N-step-free control action was designed based on an ARX-identified state-space model, and an MRAS estimator with PI adaptation was integrated to online-update the dominant time constant perturbed by stirring. Simulation and experimental results demonstrated that the proposed MPC-MRAS method achieved temperature control accuracy within ±0.2 °C, superior set-point tracking, and robust disturbance rejection compared to conventional MPC without parameter adaptation. The integrated strategy effectively compensates for model uncertainties caused by fluid agitation and operational variations, showing significant potential for industrial electrodeposition applications. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
The Application of Transition Metal Nitride Catalyst in the HDO Reaction of Lignin and Its Model Compounds Chang Sok Kim; Jong Nam Kim; Hak Myong Song; Hyon Il Do; Se Kwon O
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20762

Abstract

As the only abundant and renewable non-fossil resource that provides aromatic compounds in nature, lignin is an important raw material for the production of new energy and high-value chemicals. Transition metal nitride is widely used as a good hydrodeoxygenation (HDO) catalyst in the catalytic conversion reaction of lignin and its model compounds thanks to its crystal structure and properties, and good hydrodeoxygenation activity similar to noble metals. This paper reviewed the application of transition metal nitride catalysts in catalytic conversion of lignin and its model compounds. And the paper comprehensively analyzed the components of transition metal nitride catalyst, the nitriding method and the molar hourly space velocities (MHSV) in the preparation process, the carrier, the addition of other metals, the influence of reaction conditions on the catalytic activity and the reaction mechanism. In addition, the paper discussed the problems arising in applying the transition metal nitride catalysts in the reaction of lignin and its model compound HDO were proposed, and proposed the ways to develop nitride catalysts with higher catalytic performance and wider application prospect. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Selective Synthesis of Glycerol Monostearate by Glycerol Borate Kyong Il Choe; Chol Min Ri; Jong Nam Kim; Rak Won Paek
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20763

Abstract

Glycerol monostearate, a widely used nonionic surfactant in food, pharmaceutical, and cosmetic industries. However, current synthesis methods such as molecular distillation and functional group protection suffer from high equipment costs, complex post-processing, or low product purity. In this study, a boric acid ester protection method was developed to selectively synthesize high-purity glycerol monostearate. Quantum chemical calculations (AM1 method) and Monte Carlo simulations were used to predict optimal reaction conditions. Bisglyceride borate was synthesized and characterized by FT-IR, then esterified with stearic acid, and hydrolyzed to yield the final product. The optimal conditions were: glycerol-to-boric acid molar ratio 2:1, 115 °C with toluene as azeotropic agent, 70 min (bisglyceride borate conversion: 96.0%). The final product purity was >95% by HPLC, with melting point 61–63 °C and HLB value 3.8. This method offers mild conditions, simple post-processing, and high purity, making it industrially promising. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Lignocellulosic Biomass into Mass-Producible Fuels A Critical Review of Hydrothermal Liquefaction and Upgrading Strategies Adekoyejo Adeniyi Kujore; Kelechi Angelina Iheonye
Journal of Chemical Engineering Research Progress 2026: JCERP, Volume 3 Issue 2 Year 2026 (December) (Issue in Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/jcerp.20749

Abstract

Hydrothermal liquefaction (HTL) of lignocellulosic biomass provides a viable route for converting wet, low-value residues into energy-dense biocrude suitable for upgrading to drop-in fuels. This review systematically covers feedstock selection and pretreatment strategies, fundamental HTL reaction pathways, and the effects of operating conditions and reactor configurations on product yields and distribution. Advances in biocrude characterization using chromatographic and spectroscopic techniques are reviewed alongside upgrading approaches, including solvent extraction, fractional distillation, catalytic hydrotreatment, and refinery co-processing. The generation, composition, and management of the aqueous phase are also examined, with emphasis on treatment challenges, environmental impacts, and potential valorization routes. Key technological barriers, including heteroatom removal, catalyst deactivation, integration of upgrading processes, and scale-up economics are critically assessed using insights from recent techno-economic and life cycle assessment studies. Based on literature reported between 2015 and 2026, this review identifies research priorities required to advance lignocellulosic HTL toward scalable, commercially viable, and sustainable fuel production. Copyright © 2026 by Authors, Published by Universitas Diponegoro and BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Page 11 of 12 | Total Record : 112

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