Optimization of hydrogen generation rate with Co/MMT catalyst from NaBH4 using Box-Behnken method

Yıl 2024, Cilt: 30 Sayı: 1, 87 - 94, 29.02.2024

Seda Hoşgün , Emir Zafer Hoşgün

Öz

In this study, a Co/MMT catalyst was synthesized by pillaring method using montmorillonite (MMT) as a support material for hydrogen production by hydrolysis reaction from sodium borohydride (NaBH4) solution. N2 sorption, XRD, SEM-EDS, and FTIR spectroscopy techniques were used for catalyst characterization. To optimize the amount of hydrogen obtained as a result of the hydrolysis reaction, the NaBH4 concentration (0.3-0.5 M), the sodium hydroxide (NaOH) concentration (0.3-0.5 M), the amount of catalyst (20-50 mg) and the reaction temperature (30-50 °C) were invesigated. The optimal conditions obtained from the Box-Behnken analysis were 50 °C, 0.33 M NaBH4, 39 mg catalyst, 0.46 M NaOH, and the maximum reaction rate (hydrogen production) was 2328 mL min-1 gcat -1at standard temperature and pressure (298K,1atm). According to the analysis of variance, it was found that all parameters had a significant effect on the hydrogen production rate.

Anahtar Kelimeler

Hydrogen, Sodium borohydride, Montmorillonite, Box-Behnken

Box-Behnken metodu kullanılarak NaBH4'ten Co/MMT katalizörü ile hidrojen üretim hızının optimizasyonu

Öz

Bu çalışmada, destek malzemesi olarak Montmorillonit (MMT) kullanılarak sütunlama yöntemiyle Co/MMT katalizörü, sodyum borhidrür (NaBH4) çözeltisinden hidroliz reaksiyonu ile hidrojen üretimi için sentezlenmiştir. Katalizör karakterizasyonu için N2 sorpsiyon, XRD, SEM-EDS ve FTIR spektroskopi teknikleri kullanılmıştır. Hidroliz reaksiyonu sonucunda elde edilen hidrojen miktarını optimize etmek amacıyla, NaBH4 konsantrasyonu (0.3-0.5 M), sodyum hidroksit (NaOH) konsantrasyonu (0.3-0.5 M), katalizör miktarı (20-50 mg) ve reaksiyon sıcaklığı (30-50 °C) gibi parametrelerin etkisi incelenmiştir. Box-Behnken analizinden elde edilen optimal koşullar 50 °C, 0.33M NaBH4, 39 mg katalizör, 0.46 M NaOH olup, maksimum reaksiyon (hidrojen üretim) hızı standart sıcaklık ve basınç koşullarında (298K, 1atm) (2328 mL dak-1 gcat -1 olarak bulunmuştur. Varyans analizine göre tüm parametrelerin hidrojen üretim hızı üzerinde önemli bir etkisi olduğu belirlenmiştir.

Anahtar Kelimeler

Hidrojen, Sodyum borhidrür, Montmorillonit, Box-Behnken

Kaynakça

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