Development of High-Surface-Area Alumina-Supported Catalysts for the Generation of Hydrogen from NaBH4

Meltem Karaismailoğlu Elibol

Makale detayları

Development of High-Surface-Area Alumina-Supported Catalysts for the Generation of Hydrogen from NaBH4

Yazarlar:

Meltem Karaismailoğlu Elibol

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Kimya Mühendisliği (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.25 Issue 1, pp.53-58

Belge Tipi:

Makale

Yayın Tarihi:

7/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001339825

pISSN:

2149-3367

Anahtar kelimeler:

Özet:

 Hydrogen as a valuable energy carrier plays a significant role in renewable energy technologies to reduce the greenhouse gas emission into the atmosphere. However, natural hydrogen gas does not exist in the universe and should be gained from hydrogen-containing compounds. In this regard, metal hydrides are excellent candidates for producing hydrogen gas. Among complex metal hydrides, sodium borohydride NaBH4 possesses its advantages due to its enhanced hydrogen storage capacity and low cost. In the present study, hydrogen gas was generated through the catalytic hydrolysis of NaBH4. In this regard, high-surface-area alumina-supported NiAl2O3, NiCoAl2O3, and Ru-NiCoAl2O3 catalysts have been prepared via wash coating method and tested in a continuous flow reactor. The results indicate that the Ru-NiCoAl2O3 catalyst showed the highest initial catalytic activity but with a rapid loss in its avtivity. Compared to that, despite a lower initial catalytic activity in the presence of the NiCoAl2O3 catalyst, the hydrogen generation kept rising during the reaction. Therefore, the NiCoAl2O3 catalyst can be proposed much efficient catalyst compared to the Ru-NiCoAl2O3.

 Hydrogen as a valuable energy carrier plays a significant role in renewable energy technologies to reduce the greenhouse gas emission into the atmosphere. However, natural hydrogen gas does not exist in the universe and should be gained from hydrogen-containing compounds. In this regard, metal hydrides are excellent candidates for producing hydrogen gas. Among complex metal hydrides, sodium borohydride NaBH4 possesses its advantages due to its enhanced hydrogen storage capacity and low cost. In the present study, hydrogen gas was generated through the catalytic hydrolysis of NaBH4. In this regard, high-surface-area alumina-supported NiAl2O3, NiCoAl2O3, and Ru-NiCoAl2O3 catalysts have been prepared via wash coating method and tested in a continuous flow reactor. The results indicate that the Ru-NiCoAl2O3 catalyst showed the highest initial catalytic activity but with a rapid loss in its avtivity. Compared to that, despite a lower initial catalytic activity in the presence of the NiCoAl2O3 catalyst, the hydrogen generation kept rising during the reaction. Therefore, the NiCoAl2O3 catalyst can be proposed much efficient catalyst compared to the Ru-NiCoAl2O3.

 Hydrogen as a valuable energy carrier plays a significant role in renewable energy technologies to reduce the greenhouse gas emission into the atmosphere. However, natural hydrogen gas does not exist in the universe and should be gained from hydrogen-containing compounds. In this regard, metal hydrides are excellent candidates for producing hydrogen gas. Among complex metal hydrides, sodium borohydride NaBH4 possesses its advantages due to its enhanced hydrogen storage capacity and low cost. In the present study, hydrogen gas was generated through the catalytic hydrolysis of NaBH4. In this regard, high-surface-area alumina-supported NiAl2O3, NiCoAl2O3, and Ru-NiCoAl2O3 catalysts have been prepared via wash coating method and tested in a continuous flow reactor. The results indicate that the Ru-NiCoAl2O3 catalyst showed the highest initial catalytic activity but with a rapid loss in its avtivity. Compared to that, despite a lower initial catalytic activity in the presence of the NiCoAl2O3 catalyst, the hydrogen generation kept rising during the reaction. Therefore, the NiCoAl2O3 catalyst can be proposed much efficient catalyst compared to the Ru-NiCoAl2O3.

 Değerli bir enerji taşıyıcısı olan hidrojen, yenilenebilir enerji teknolojilerinde atmosfere sera gazı emisyonunun azaltılmasında önemli bir rol oynamaktadır. Ancak hidrojen gazı doğada mevcut olmayıp hidrojen içeren bileşiklerden elde edilmesi gerekmektedir. Metal hidrürler hidrojen gazı üretimi için mükemmel adaylardır. Karmaşık metal hidrürler arasında sodyum borhidrür NaBH4, gelişmiş hidrojen depolama kapasitesi ve düşük maliyeti gibi çeşitli avantajlara sahiptir. Bu çalışmada katalitik hidroliz yoluyla NaBH4ten hidrojen gazı üretilmektedir. Bu amaçla yıkayarak kaplama yöntemi ile yüksek yüzey alanına sahip alümina destekli NiAl2O3, NiCoAl2O3 ve Ru-NiCoAl2O3 yapılı katalizörler hazırlanmış olup bu katalizörler sürekli akışlı reaktörde test edilmiştir. Elde edilen sonuçlara göre Ru-NiCoAl2O3 yapılı katalizör başlangıçta en yüksek katalitik aktiviteye sahip olup reaksiyon boyunca aktivitesinde hızlı bir azalma gözlemlenmiştir. NiCoAl2O3 yapılı katalizörün varlığında ise başlangıçta daha düşük bir katalitik aktivitesi görülmesine rağmen reaksiyon boyunca hidrojen üretimi hızla artmaya devam etmiştir. Bu nedenle NiCoAl2O3 yapılı katalizör, Ru-NiCoAl2O3 yapısına göre daha verimli bir katalizör olarak önerilebilir.

Makale detayları

Development of High-Surface-Area Alumina-Supported Catalysts for the Generation of Hydrogen from NaBH4

Yazarlar:

Meltem Karaismailoğlu Elibol

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Kimya Mühendisliği (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.25 Issue 1, pp.53-58

Belge Tipi:

Makale

Yayın Tarihi:

7/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001339825

pISSN:

2149-3367

Sodium borohydride

hydrolysis

hydrogen

alumina

catalystSodyum borhidrür

hidroliz

hidrojen

alümina

katalizör

Sayı

Makale detayları

Yazarlar: Meltem Karaismailoğlu Elibol

Yayıncı: Afyon Kocatepe University

Ana Başlıklar: Kimya Mühendisliği (Diğer)

Dergi: Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.25 Issue 1, pp.53-58

Belge Tipi: Makale

Yayın Tarihi: 7/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001339825

pISSN: 2149-3367

Sayı

Yazarlar:

Meltem Karaismailoğlu Elibol

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Kimya Mühendisliği (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.25 Issue 1, pp.53-58

Belge Tipi:

Makale

Yayın Tarihi:

7/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001339825

pISSN:

2149-3367