Metal içerikli Katalizörler Varlığında Sodyum Bor Hidrürün Hidroliziyle Hidrojen Üretiminin İncelenmesi

Yıl 2026, Cilt: 29 Sayı: 2 , 1 - 19 , 15.03.2026

Gamze Gündüz Meriç , Adife Şeyda Yargıç , Elif Yaman Çamlı

https://doi.org/10.2339/politeknik.1717524

https://izlik.org/JA89EN26YS

Öz

Fosil yakıtların neden olduğu sera gazlarının etkilerinin azaltılmasıyla sürdürülebilir bir dünya sağlamayı amaçlayan küresel anlaşmalar, hidrojen üretimi de dahil olmak üzere daha temiz, daha verimli ve yenilenebilir enerji kaynakları için araştırmaları teşvik etmektedir. Hidrojen, düşük karbonlu teknolojilerin yayılmasına güçlü bir şekilde katkıda bulunabileceği ve enerji güvenliğini sağlayabileceği için sıfır emisyona doğru uzun vadeli bir çözüm olarak kabul edilmektedir. Bu çalışma, sodyum bor hidrürün (NaBH4) hidrolizi yöntemiyle hidrojen üretimine odaklanan yayınların kapsamlı bir analizini içermektedir. NaBH4’ün hidroliz süreci kendi başına çok yavaştır, ancak birçok metal esaslı katalizör (örn. Ru, Co, vb.) hidroliz süreci sırasında mükemmel katalitik aktivite göstermektedir. Yapılan bu derleme çalışmasında NaBH4’ün hidroliz reaksiyonunu etkileyen katalizör türleri ve reaksiyon parametreleri özetlenmiştir. Literatür çalışmalarından elde edilen sonuçlara göre, metal dispersiyonunun daha iyi olabilmesi için katalizör destek malzemesinin kullanılması tavsiye edilmektedir. Katalizör destek malzemeleri ayrıca katalizör maliyetini de düşürmektedir. Destek üzerine bi-metalik katkı yapıldığında ise metallerin sinerjik etkisi dolayısıyla aktivasyon enerjilerinin düştüğü ve hidrojen üretim hızının arttığı görülmüştür. NaBH4’ün suda sınırlı çözünürlüğü nedeniyle katalizörsüz hidroliz reaksiyonlarında H2 üretim hızı nispeten zayıf olduğundan katalizör miktarı ve yüklenen metal oranı arttıkça, hidrojen üretim hızı genellikle parabolik olarak artmaktadır. Reaksiyon ortamındaki NaBH4 konsantrasyonu arttıkça, hidrojen üretim hızı parabolik olarak artmaktadır. Ancak, yüksek NaBH4 konsantrasyonlarında katalizör yüzeyinde biriken NaBO2 sebebiyle hızda azalış meydana gelmektedir. Bu sebeple her sistem için reaksiyon parametreleri optimize edilmelidir.

Anahtar Kelimeler

Hidrojen üretimi , Hidroliz , Katalizör Türü , NaBH4 , Reaksiyon Parametreleri

Investigation of Hydrogen Production by Sodium Boron Hydride Hydrolysis in the Presence of Metal-Containing Catalysts

https://izlik.org/JA89EN26YS

Öz

Global agreements aim to achieve a sustainable world by reducing the effects of greenhouse gases caused by fossil fuels encourage research into cleaner, more efficient and renewable energy sources, including hydrogen production. Hydrogen is considered as a long-term solution towards zero emission as it can strongly contribute to the spread of low-carbon technologies and ensure energy security. This survey covers a comprehensive analysis of searches focusing on the hydrogen production from hydrolysis of sodium borohydride (NaBH4). The self-hydrolysis process of NaBH4 is very slow, though various metal-based catalysts (e.g. Ru, Co, etc.) show excellent catalytic activity during the hydrolysis process. In this review, the catalyst types and reaction parameters affecting the hydrolysis reaction of NaBH4 were summarized. Based on literature studies, the use of catalyst support is recommended for improved metal dispersion. Catalyst support materials also reduce catalyst costs. Bi-metallic doping to the support have been shown to reduce activation energies and increase hydrogen production rates due to the synergistic effect of the metals. Due to the limited water solubility of NaBH4, the rate of H2 production in uncatalyzed hydrolysis reactions is relatively low. As the amount of catalyst and the metal loading ratio increase, the hydrogen production rate generally increases parabolically. As the NaBH4 concentration in the reaction medium increases, the hydrogen generation rate enhances parabolically. However, at high NaBH4 concentrations, the rate decreases due to NaBO2 agglomeration on the catalyst surface. Therefore, reaction parameters should be optimized for each reaction system.

Anahtar Kelimeler

Hydrogen Production , Hydrolysis , Catalyst Type , NaBH4 , Reaction Parameters

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