Atık Uçucu Külden sentezlenen Co/Zeolit ​​Katalizörleri ile NaBH4 Metanoliziyle Hidrojen Üretimi

Year 2026, Volume: 11 Issue: 1 , 22 - 30 , 31.03.2026

Ceyda Bilgiç , Seda Hoşgün

https://doi.org/10.30728/boron.1802039

https://izlik.org/JA89UA44LK

Abstract

Atıkların katma değerli ürünlere dönüştürülmesine yönelik yeni yöntemlerin geliştirilmesi, kirliliğin azaltılması ve sürdürülebilirliğin sağlanması açısından gereklidir. Bu çalışmada, endüstriyel atık uçucu külün katalizör desteği olarak kullanımı araştırılmıştır. Hidrotermal yöntem kullanılarak atık uçucu külden (FA) sentezlenen Zeolit A ve Zeolit X de katalizör desteği olarak kullanılmıştır. Sodyum borohidrürden (NaBH4) hidrojen üretimi için üç farklı katalizör desteği (Zeolit A, Zeolit X ve atık FA) kullanılarak yeni bir CoB/FA katalizörü sentezlenmiştir. FA bazlı Co katalizörleri ıslak emprenye ve kimyasal indirgeme yöntemleriyle hazırlanmış ve NaBH4’ten hidrojen üretimi için metanoliz reaksiyonunu hızlandırmak amacıyla kullanılmıştır. Metanoliz reaksiyonunun CoB/FA, CoB/ZXF ve CoB/ZAF katalizörleri kullanılarak etkin bir şekilde hızlandırıldığı gözlemlenmiştir. Sentezlenen katalizörler ile NaBH4’ün katalitik metanolizinde hidrojen üretim hızları (HGR), 25°C’de CoB/FA, CoB/ZXF ve CoB/ZAF için sırasıyla 8683.1, 11867.7 ve 13616.1 mL·dk-1·gCo-1 olarak belirlenmiştir. Katalizörlerin morfolojik özelliklerini ve yüzey bileşimini belirlemek amacıyla taramalı elektron mikroskobu (SEM) ve X-ışını kırınımı (XRD) analizleri kullanılmıştır. İdeal koşullar altında, reaksiyonun aktivasyon enerjisi CoB/ZAF katalizörü varlığında 39.45 kJ mol⁻¹ olarak belirlenmiş olup, bu katalizör NaBH4’ün metanolizi için dikkate değer bir çevrim performansı da sergilemiştir. Ayrıca, CoB/ZAF katalizörü ile beşinci çevrim sonrasında hidroliz reaksiyonlarında yüksek yeniden kullanılabilirlik kararlılığı gözlemlenmiştir. Atık FA’dan sentezlenen zeolitlerin NaBH4’ün metanoliz reaksiyonları için destek malzemesi olarak değerlendirilmesi umut vericidir.

Keywords

Katalizör sentezi , Hidrojen , Metanoliz , Uçucu kül , Zeolit

Co/Zeolite Catalysts Derived from Waste Fly Ash for Efficient Hydrogen Production by Methanolysis of NaBH4

https://izlik.org/JA89UA44LK

Abstract

Developing new ways to convert waste into value-added products is essential to reduce pollution and ensure sustainability. The use of industrial waste fly ash as a catalyst support was investigated in this study. Zeolite A and Zeolite X, which were synthesized from waste fly ash (FA) using a hydrothermal process, were also used as catalyst supports. A novel CoB/FA catalyst was synthesized for H2 production from sodium borohydride (NaBH4) with three different catalyst supports (Zeolite A, Zeolite X, and waste FA). FA-based Co catalysts were prepared by wet impregnation and chemical reduction and used to accelerate the methanolysis reaction for hydrogen generation from NaBH4. It was observed that the methanolysis reaction is effectively accelerated using CoB/FA, CoB/ZXF, and CoB/ZAF catalysts. The hydrogen generation rates (HGR) of catalytic methanolysis of NaBH4 with the synthesized catalyst were 8683.1, 11867.7, and 13616.1 mL·min-1·gCo-1 for CoB/FA, CoB/ZXF, and CoB/ZAF, respectively, at 25°C. Scanning electron microscopy (SEM) and X-Ray diffraction (XRD) were used to determine the morphological properties and surface content of the catalysts. Under ideal conditions, the activation energy of the reaction was determined to be 39.45 kJ mol-1 in the presence of the CoB/ZAF catalyst, which also exhibits remarkable cycling performance for the methanolysis of NaBH4. In addition, a high reusable stability of the hydrolysis reactions was observed with the CoB/ZAF catalyst after the fifth cycle. The evaluation of zeolites synthesized from waste FA as support materials for methanolysis reactions of NaBH4 is promising.

Keywords

Catalyst synthesis , Hydrogen , Methanolysis , Fly Ash , Zeolite

References

• Wang, J., & Azam, W. (2024). Natural resource scarcity, fossil fuel energy consumption, and total greenhouse gas emissions in top emitting countries. Geoscience Frontiers, 15(2), 101757. https://doi.org/10.1016/j.gsf.2023.101757
• Reda, B., Elzamar, A. A., AlFazzani, S., & Ezzat, S. M. (2024). Green hydrogen as a source of renewable energy: A step towards sustainability, an overview. Environment, Development and Sustainability, 27, 29213-29233. https://doi.org/10.1007/s10668-024-04892-z
• Kaya, C. (2025). A review on reactor design parameters of sodium borohydride (NaBH4) hydrolysis. Journal of Boron, 10(2),68-84. https://doi.org/10.30728/boron.1612416
• Davids, M. W., Lototskyy, M., Malinowski, M., van Schalkwyk, D., Parsons, A., Pasupathi, S., … & van Niekerk, T. (2019). Metal hydride hydrogen storage tank for light fuel cell vehicle. International Journal of Hydrogen Energy, 44(55), 29263–29272. https://doi.org/10.1016/j.ijhydene.2019.01.227
• Wang, F., Zhang, Y., Wang, Y., Luo, Y., Chen, Y., & Zhu, H. (2018). Co-P nanoparticles supported on dandelion-like CNTs-Ni foam composite carrier as a novel catalyst for hydrogen generation from NaBH4 methanolysis. International Journal of Hydrogen Energy, 43(18), 8805–8814. https://doi.org/10.1016/j.ijhydene.2018.03.140
• Xu, D., Zhao, L., Dai, P., & Ji, S. (2012). Hydrogen generation from methanolysis of sodium borohydride over Co/Al2O3 catalyst. Journal of Natural Gas Chemistry, 21(5), 488–494. https://doi.org/10.1016/S1003-9953(11)60395-2
• Demirci, S., Sunol, A. K., & Sahiner, N. (2020). Catalytic activity of amine functionalized titanium dioxide nanoparticles in methanolysis of sodium borohydride for hydrogen generation. Applied Catalysis B: Environmental, 261, 118242. https://doi.org/10.1016/j.apcatb.2019.118242
• Bekirogullari, M. (2024). Synthesis of waste eggshell-derived Au/Co/Zn/eggshell nanocomposites for efficient hydrogen production from NaBH4 methanolysis. International Journal of Hydrogen Energy, 52, 1380–1389. https://doi.org/10.1016/j.ijhydene.2023.06.270
• Leite, R. R., Dutra de Souza, D. T., de Souza Amaral, M., Basso Bernardi, M. I., & Fajardo, H. V. (2025). Two-dimensional ultrathin Co3O4 nanosheet: A cost-effective and reusable catalyst for hydrogen production via sodium borohydride methanolysis. International Journal of Hydrogen Energy, 124, 204–217. https://doi.org/10.1016/j.ijhydene.2025.04.018
• Wang, T., Jiang, T., Zhang, H., & Zhao, Y. (2022). Advances in catalysts for hydrogen production by methanolysis of sodium borohydride. International Journal of Hydrogen Energy, 47(32), 14589–14610. https://doi.org/10.1016/j.ijhydene.2022.02.173
• Xin, Y., Wang, Z., & Jiang, Y. (2019). Kinetic study of NaBH4 catalytic hydrolysis using supported NiCo2O4. Materials Research Express, 6(12), 125530. https://doi.org/10.1088/2053-1591/ab5d4c
• Manna, J., Roy, B., Vashistha, M., & Sharma, P. (2014). Effect of Co+2/BH4− ratio in the synthesis of Co–B catalysts on sodium borohydride hydrolysis. International Journal of Hydrogen Energy, 39(1), 406-413. https://doi.org/10.1016/j.ijhydene.2013.10.018
• Mintova, S., Jaber, M., & Valtchev, V. (2015). Nanosized microporous crystals: Emerging applications. Chemical Society Reviews, 44(20), 7207–7233. https://doi.org/10.1039/C5CS00210A
• Sun, Q., Wang, N., & Yu, J. (2021). Advances in catalytic applications of zeolite-supported metal catalysts. Advanced Materials, 33(51), 2104442. https://doi.org/10.1002/adma.202104442
• Saka, C. (2023). Highly active hydrogen generation from sodium borohydride methanolysis and ethylene glycolysis reactions using protonated chitosan-zeolite hybrid metal-free particles. Applied Catalysis B: Environmental, 325, 122335. https://doi.org/10.1016/j.apcatb.2022.122335
• Mohammadi-Jam, S., & Waters, K. E. (2014). Inverse gas chromatography applications: A review. Advances in Colloid and Interface Science, 212, 21–44. https://doi.org/10.1016/j.cis.2014.07.002
• Kıpçak, İ., & Kalpazan, E. (2024). Efficient and stable Co-B catalyst supported on natural zeolite for hydrogen generation from hydrolysis of alkaline NaBH4 solution. Catalysis Letters, 154(9), 5006–5021. https://doi.org/10.1007/s10562-024-04702-1
• Çalışkan, S., Zahmakıran, M., & Özkar, S. (2010). Zeolite confined rhodium(0) nanoclusters as highly active, reusable, and long-lived catalyst in the methanolysis of ammonia-borane. Applied Catalysis B: Environmental, 93(3-4), 387–394. https://doi.org/10.1016/j.apcatb.2009.10.013
• Haukka, S., Lakomaa, E. L., & Suntola, T. (1999). Adsorption controlled preparation of heterogeneous catalysts. Studies in Surface Science and Catalysis, 120, 715-750. https://doi.org/10.1016/S0167-2991(99)80570-9
• Williams, R. P., & van Riessen, A. (2010). Determination of the reactive component of fly ashes for geopolymer production using XRF and XRD. Fuel, 89(12), 3683–3692. https://doi.org/10.1016/j.fuel.2010.07.031
• Ruan, J., Wang, S., Yang, F., Xiang, C., Zou, Y., Xu, F., & Sun, L. (2024). Hydrolysis of NaBH4 using carbonized melamine foam-supported cobalt borate composite catalyst for H2 production. International Journal of Electrochemical Science, 19(2), 100461. https://doi.org/10.1016/j.ijoes.2024.100461
• Bilgiç, C., Hoşgün, S., & Çiftci, A. (2025). Hydrothermal synthesis and characterization of zeolite A and zeolite X from kaolinite, fly ash, slag and their application in hydrogen generation systems on NaBH4 hydrolysis. International Journal of Hydrogen Energy, 109, 742–752. https://doi.org/10.1016/j.ijhydene.2025.02.171
• Abdulaziz, F., El-Tantawy, A. I., Humaidi, J. R., Aljaloud, A. S., Azhary, A., Alanazi, A. A., … & Taha, T. A. M. (2024). Structure-performance relationship of SrTiO3/S@g-C3N4 nanocomposites for highly active hydrogen production via NaBH4 methanolysis. Diamond and Related Materials, 148, 111389. https://doi.org/10.1016/j.diamond.2024.111389
• Prabu, S., & Chiang, K.-Y. (2023). Synergistic effect of Pd-Co3O4 nanoparticles supported on coffee-derived sulfur, nitrogen-codoped hierarchical porous carbon for efficient methanolysis of NaBH4. Journal of Alloys and Compounds, 938, 168548. https://doi.org/10.1016/j.jallcom.2022.168548
• Yang, L., Fan, C., Zhang, J., Zhang, F., Li, R., Yi, S., … & Dong, H. (2021). Poly(acrylic acid)-modified silica nanoparticles as a nonmetal catalyst for NaBH4 methanolysis. International Journal of Hydrogen Energy, 46(45), 23236–23244. https://doi.org/10.1016/j.ijhydene.2021.04.140
• Ma, M., Zhou, W., Zhang, Y., Huang, Q., Hu, Z., & Ouyang, L. (2024). Natural lignin as efficient catalyst for H2 production from NaBH4 methanolysis at low temperature. Journal of Environmental Chemical Engineering, 12(1), 111615. https://doi.org/10.1016/j.jece.2023.111615
• Akın, M. B., & Şahin, Ö. (2025). Hydrogen production via methanolysis of sodium borohydride using acetic acid as a catalyst. Renewable Energy, 240, 122247. https://doi.org/10.1016/j.renene.2024.122247
• Al Janabi, M. A. Y., El Houda Tiri, R. N., Cherif, A., Altuner, E. E., Lee, C.-J., Sen, F., … & Kalikeri, S. (2024). Hydrogen generation by methanolysis of NaBH4 via efficient CuFe2O4 nanoparticle catalyst: A kinetic study and DNN model. Topics in Catalysis, 67(9), 843–852. https://doi.org/10.1007/s11244-024-01904-0
• Saka, C. (2021). Very efficient dehydrogenation of methanolysis reaction with nitrogen doped Chlorella Vulgaris microalgae carbon as metal-free catalysts. International Journal of Hydrogen Energy, 46(40), 20961–20971. https://doi.org/10.1016/j.ijhydene.2021.03.220
• Ali, F., Khan, S. B., & Asiri, A. M. (2018). Enhanced H2 generation from NaBH4 hydrolysis and methanolysis by cellulose micro-fibrous cottons as metal templated catalyst. International Journal of Hydrogen Energy, 43(13), 6539–6550. https://doi.org/10.1016/j.ijhydene.2018.02.008
• Sahiner, N., & Sengel, S. B. (2016). Quaternized polymeric microgels as metal free catalyst for H2 production from the methanolysis of sodium borohydride. Journal of Power Sources, 336, 27–34. https://doi.org/10.1016/j.jpowsour.2016.10.054
• Abebe, M. W., Baye, A. F., & Kim, H. (2022). Poly (acrylic acid)/polysaccharides IPN derived metal free catalyst for rapid hydrogen generation via NaBH4 methanolysis. International Journal of Hydrogen Energy, 47(75), 32060–32070. https://doi.org/10.1016/j.ijhydene.2022.07.106
• Khan, S. B., Ali, F., & Asiri, A. M. (2020). Metal nanoparticles supported on polyacrylamide water beads as catalyst for efficient generation of H2 from NaBH4 methanolysis. International Journal of Hydrogen Energy, 45(3), 1532–1540. https://doi.org/10.1016/j.ijhydene.2019.11.042