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All Journal Makara Journal of Science Environmental and Materials Bulletin of Chemical Reaction Engineering & Catalysis
Khatrin, Irena
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Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Energy Engineering Physics

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Journal : Environmental and Materials

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Amine-modified Ni-DOBDC MOF for CO2 capture: CO2 adsorption capacity and reusability Fahriansyah, Irsan; Khatrin, Irena; Abdullah, Iman; Krisnandi, Yuni Krisyuningsih
Environmental and Materials Vol. 2 No. 2: (December) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v2i2.2024.1431

Abstract

Background: Anthropogenic carbon dioxide (CO₂) emissions have risen significantly due to the extensive use of fossil fuels, necessitating the development of effective CO₂ capture and conversion techniques. Adsorption using Metal-Organic Frameworks (MOFs) has shown great potential due to their high CO₂ adsorption capacity, particularly Ni-based MOFs. Enhancing their adsorption efficiency remains a key research focus to improve sustainability in CO₂ capture applications. Methods: Ni-based MOF (Ni-DOBDC) was synthesized using the solvothermal method, employing DMF as the solvent and 2,5-dihydroxyterephthalic acid (DOBDC) as the organic ligand. To enhance CO₂ adsorption capacity, Ni-DOBDC was further modified with ethylenediamine (EDA) via post-synthetic modification. Structural characterization was performed using XRD, confirming similarity to the Ni-DOBDC reference (CCDC 288477), and FTIR, which showed enhanced absorbance peaks. SEM-EDX analysis revealed a flower-like morphology with an average particle size of 0.75 μm. CO₂ adsorption tests were conducted on Ni-DOBDC and EDA/Ni-DOBDC (10%) using the titration method under controlled conditions. Findings: The CO₂ adsorption capacity of Ni-DOBDC and EDA/Ni-DOBDC was tested at 70°C with a CO₂ concentration of 50% in N₂. EDA modification significantly improved CO₂ adsorption capacity, with EDA/Ni-DOBDC achieving 9.95 mmol g⁻¹ compared to pristine Ni-DOBDC’s 6.44 mmol g⁻¹. However, Ni-DOBDC exhibited better regeneration ability in a three-cycle reusability test, likely due to EDA leaching during regeneration. Conclusion:  EDA-modified Ni-DOBDC demonstrates enhanced CO₂ adsorption capacity, making it a promising material for CO₂ capture applications. However, its reduced regeneration stability suggests the need for further optimization to improve long-term performance. Future studies should explore strategies to minimize EDA leaching while maintaining high adsorption efficiency. Novelty/Originality of this article: This study provides new insights into improving Ni-based MOF performance for CO₂ capture through post-synthetic modification with EDA. The findings highlight a trade-off between increased adsorption capacity and material stability, emphasizing the need for further refinement in MOF functionalization strategies.
Optimizing vanillin and phenol production from benzyl phenyl ether using CoMoO4/H-ZSM-5: A Box-Behnken design approach Khatrin, Irena; Amanullah, Duha Rushida; Wibowo, Rahmat; Howe, Russell Francis; Krisnandi, Yuni Krisyuningsih
Environmental and Materials Vol. 3 No. 2: (December) 2025
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v3i2.2025.2161

Abstract

Background: Lignin valorization into high-value chemicals is crucial for sustainable development. This study focused on optimizing the catalytic conversion of benzyl phenyl ether (BPE), a lignin model compound, to vanillin and phenolic compounds. Methods: Hierarchical H-ZSM-5 was synthesized via a dual-template method and subsequently modified by wet impregnation with bimetallic cobalt and molybdenum oxides (CoMoO4/H-ZSM-5). Catalyst properties were thoroughly characterized using various techniques, including XRD, FTIR, XRF, N2-physisorption, and SEM-EDS mapping. Reaction conditions, specifically Co:Mo ratio, temperature, and reaction time, were optimized using the Box-Behnken design (BBD), and product yields were quantified by High-Performance Liquid Chromatography (HPLC). Findings: Characterization confirmed successful catalyst synthesis, organic template removal, and bimetal oxide incorporation without significant structural damage. Catalytic tests demonstrated 100% BPE conversion. The highest experimental vanillin yield achieved was 54.69%. BBD analysis revealed that the interaction between Co:Mo ratio and temperature, as well as the quadratic effect of Co:Mo ratio, were the most influential factors impacting product yields. The optimal parameters for maximizing vanillin and phenolic yield were determined to be a Co:Mo ratio of 3:7, a temperature of 169 °C, and a reaction time of 31 minutes. While the phenolic model showed a reasonable fit (R² = 0.76), the vanillin model exhibited a lower fit (R² = 0.34) with significant lack-of-fit. Conclusion: This research provides crucial insights into the efficient production of high-value chemicals from BPE, offering a comprehensive optimization approach for the CoMoO4/H-ZSM-5 catalytic system. Novelty/Originality of this article: This study represents a novel contribution to lignin valorization.
Co-Authors Amanullah, Duha Rushida Ekananda, Rizki Fahriansyah, Irsan Griffith, Benyamin E Hanna, John Vincent Iman Abdullah Muhammad Ridwan Putri, Danika Nurranalya RAHMAT WIBOWO Russell Francis Howe, Russell Francis Saragi, Indah Revita Yuni Krisyuningsih Krisnandi, Yuni Krisyuningsih