BİYOKÜTLE TÜREVİ PROSOPİS FARCTA KATALİZÖRÜ KULLANILARAK ETİL ALKOL/PROPİLEN GLİKOL ÇÖZÜCÜ SİSTEMİNDE NABH₄’DEN HİDROJEN ÜRETİMİ

Öz

Artan enerji ihtiyacı, fosil yakıtların sınırlı olması ve çevresel kaygılar, alternatif enerji kaynaklarına yönelimi hızlandırmıştır. Bu bağlamda hidrojen, yüksek enerji yoğunluğu ve çevre dostu özellikleri ile öne çıkan bir enerji taşıyıcısıdır. Bu çalışmada, hidrojen üretimi için sodyum borhidrür (NaBH₄) kullanılmış ve reaksiyonun verimini artırmak amacıyla biyokütle temelli bir katalizör geliştirilmiştir. Katalizör sentezinde, Siirt kırsalında yetişen Prosopis farcta bitkisinin meyvesi biyokütle kaynağı olarak kullanılmıştır. Biyokütle, %30 KOH ile kimyasal olarak aktive edilmiş, 75 °C’de 24 saat bekletildikten sonra 400 °C’de 45 dakika karbonize edilmiştir. Elde edilen katalizör yıkanarak kullanıma hazır hale getirilmiştir. Hidrojeni üretmek için çözücü ortamı olarak etil alkol ve propilen glikol çözücü karışımları kullanılmıştır. Hidrojen üretim verimini etkileyen NaBH4 miktarı, katalizör miktarı ve sıcaklık parametreleri incelenmiştir. Yapılan deneyeler ve hesaplamalarda aktivasyon enerjisi 20.209 kj/mol ve ilk hızı 8126,3 mL H₂/gcat/dk olarak hesaplanmıştır.

Anahtar Kelimeler

• Prosopis Farcta
• Sodyum borhidrür
• Katalizör
• Hidrojen enerjisi.

HYDROGEN PRODUCTİON FROM NABH₄ İN AN ETHANOL/PROPYLENE GLYCOL SOLVENT SYSTEM USİNG A BİOMASS-DERİVED PROSOPİUM CATALYST

Öz

The growing demand for energy, the limited supply of fossil fuels, and environmental concerns have accelerated the shift toward alternative energy sources. In this context, hydrogen stands out as an energy carrier due to its high energy density and environmentally friendly properties. In this study, sodium borohydride (NaBH₄) was used for hydrogen production, and a biomass-based catalyst was developed to enhance the reaction’s efficiency. In the catalyst synthesis, the fruit of the Prosopis farcta plant, which grows in the rural areas of Siirt, was used as the biomass source. The biomass was chemically activated with 30% KOH, left to stand at 75 °C for 24 hours, and then carbonized at 400 °C for 45 minutes. The resulting catalyst was washed and prepared for use. A mixture of ethyl alcohol and propylene glycol solvents was used as the solvent medium for hydrogen production. The effects of NaBH₄ concentration, catalyst amount, and temperature on hydrogen production efficiency were investigated. In the experiments and calculations, the activation energy was determined to be 20,209 kJ/mol and the initial rate was calculated to be 8,126.3 mL H₂/gcat/min.

Anahtar Kelimeler

• Prosopis Farcta
• Sodium Borohydride
• Catalyst
• Hydrogen Energy.

Kaynakça

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