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Teguh Riyanto
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Editorial Office of Journal of Chemical Engineering Research Progress BCREC Publishing Group and PT Laboratorium Terpadu, Universitas Diponegoro Laboratory of Plasma-Catalysis (R3.5), UPT Laboratorium Terpadu, Universitas Diponegoro Jl. Prof. Soedarto, Semarang, Central Java, Indonesia 50275
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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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Response Surface Optimization of Setting Time and Compressive Strength of a Clay–Bauxite Geopolymer Binder for Oil-Well Cementing Barima Money; Priyanga A/P Kailasanathan; Norasyikin Ismail; Abutu David; Siti Hajar Noor Shaarani; Norida Ridzuan; Siti Qurratu' Aini Mahat
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.20745

Abstract

The development of sustainable cement alternatives has intensified interest in alkali‐activated binders formulated from abundant clay minerals. In this study, a clay-based geopolymer binder was synthesized and optimized by investigating the combined influence of activated clay loading (10-100 g), bauxite loading (0-150 g), alkaline activator dosage (0-3 g), and curing temperature (90-150 °C) on its setting time and compressive strength. A Central Composite Design (CCD) under Response Surface Methodology (RSM) was employed to model the responses and determine optimal processing conditions. The experimental results revealed that both responses were significantly influenced by the synergy between the activator dosage and raw material loading. Increasing activated clay and bauxite content accelerated geopolymerization, leading to shortened setting time, whereas excessive activator addition resulted in delayed matrix hardening due to excess soluble silicate–aluminate species. Compressive strength increased with increasing precursor loading up to a threshold level, beyond which incomplete dissolution restricted polycondensation. Regression analysis demonstrated excellent agreement between predicted and experimental values, with no transformation required, as confirmed by Box–Cox analysis. The normality and independence of residuals were verified through residual plots against predicted values and experimental runs. Optimization using a desirability function achieved a setting time of 6 h and compressive strength of 40.44 MPa at optimal conditions of activated clay (55 g), bauxite (75 g), activator dosage (1.5 g), and curing temperature (120 °C), with a global desirability of 1.000. These results confirm RSM as an effective statistical tool for tailoring the performance of clay-based geopolymers, offering a promising pathway for developing high-strength, fast-setting, sustainable 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).
Effect of Si/Al Ratio on Competitive CO₂/H2O Adsorption in FAU Zeolite for Humid Flue Gas Capture: A Computational Study Mustafa Jassim Radhi
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.20805

Abstract

Carbon capture from humid flue gas is problematic. Many microporous adsorbents are poisoned by water vapor. This research aims to study the effect of the Si/Al ratio on the competitive adsorption of CO₂ and H₂O in FAU-type zeolites, as well as evaluate their performance in capturing humid flue gases. Grand Canonical Monte Carlo (GCMC) simulations were performed to study the competitive adsorption of equimolar CO₂/H₂O mixtures at 298 K in two FAU zeolites: Zeolite 13X (Na₇₇, Si/Al ≈ 1.5) and Zeolite Y (Na₄₉, Si/Al≈2.92). The results showed that Zeolite 13X shows higher adsorption of CO₂ under low pressures, with the phenomenon of the roll-over occurring in the case of high pressure because of competitive adsorption with H₂O. In turn, the adsorption of CO₂ for Zeolite Y remained stable over the entire pressure range and exhibited lower H₂O uptake. Isosteric heats of CO₂ adsorption on the zeolites are 15.71 kcal/mol for Zeolite 13X and 13.23 kcal/mol for Zeolite Y. The energy of CO₂ binding in the presence of H₂O decreased by 1.14 kcal/mol for Zeolite 13X and for 2.03 kcal/mol for Zeolite Y. These findings indicate that high-silica FAU zeolites, such as Zeolite Y, are efficient CO₂ adsorbents. 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).

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