Al-B İkili Alaşımının Hidrojen Üretim Performansına Bi Katkılamanın Etkisi

Yaygın olarak kullanılmakta olan fosil yakıtların tükenmeye başlaması ve bu kaynaklardan elde edilen enerji maliyetlerindeki artışlar, enerjinin alternatif, temiz, yenilenebilir ve sürdürülebilir sistemlerden elde edilmesini zorunlu hale getirmiştir. Alternatif ve temiz enerji kaynağı olarak hidrojen, geleceğin yakıtı olarak kabul edilip farklı şekilde ve amaçlarda kullanılabilirliği, yüksek enerji yoğunluğu gibi alternatif enerji kaynaklarının genel özelliklerine uyan bir enerji kaynağı olarak görülmektedir. Alüminyum metali/alaşımı hidroliz yolu ile hidrojen gazı üretiminde sürdürülebilir enerji sistemlerinin geliştirilebilmesi için kullanılmaktadır. Bu çalışmada alkali çözeltide içerisinde Al-B ikili ve Al-B-Bi üçlü alaşımlarının farklı sıcaklıklarda hidrojen üretim performansı araştırılmıştır. Alaşımların döküm işlemleri argon atmosferi altında indüksiyon fırınında gerçekleştirilmiştir. Elde edilen ikili ve üçlü alaşımlardaki alüminyumun oranı ağ. %99 civarındadır. Bi katkılı üçlü Al alaşımına ait hidroliz deneylerinden elde edilen sonuçlar ikili Al-B alaşımının sonuçları ile kıyaslandığında çok yüksek bir hidrojen üretim hızına ulaşmıştır. Gaz salınım oranı Al-B ikili alaşımı için 40 oC’de 0.77 ml dk-1 cm-2 iken Al-B-Bi üçlü alaşımı için çok yüksek bir artış ile 63.58 ml dk-1 cm-2 değeri elde edilmiştir.

Anahtar Kelimeler:

Hidrojen Üretimi, Al-B-Bi alaşımı, Al Hidrolizi

Effect of Bi Doping on Hydrogen Production Performance of Al-B Binary Alloy

Abstract: Due to the consumption of widely used fossil fuels and the increase in energy costs from these sources, it has become necessary to obtain energy from alternative, clean, renewable and sustainable systems. As an alternative and clean energy source, hydrogen is accepted as the fuel of the future. Hydrogen is seen as an important energy source due to its features such as being usable in different ways and for different purposes, and high energy density. Aluminum metal/alloy is used to develop sustainable energy systems in the production of hydrogen gas by hydrolysis. In this study, hydrogen production performance of Al-B binary and Al-B-Bi ternary alloys in alkali solution at different temperatures was investigated. The casting processes of the alloys were carried out in an induction furnace under an argon atmosphere. The ratio of aluminum in the obtained binary and ternary alloys is approximately 99 wt.%. The results obtained from the hydrolysis experiments of the Bi-doped ternary Al alloy reached a very high hydrogen production rate when compared to the results of the binary Al-B alloy. While the gas emission rate was 0.77 ml min-1 cm-2 at 40 oC for the Al-B binary alloy, a very high increase was obtained for the Al-B-Bi ternary alloy, with a value of 63.58 ml min-1 cm-2.

Keywords:

Hydrogen Generation, Al-B-Bi Alloy, Al Hydrolysis,

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