Abstract:Bu çalışmada, organik atık kaynaklarından olan nar kabuğu, katalizör üretimi için ilk kez doğrudan destek malzemesi olarak kullanılmıştır. Amaç, yenilenebilir bir enerji kaynağı olan hidrojen üretimi için kullanılabilecek metal içeren katalizörlerde kullanılacak olan destek maddesini doğrudan kullanarak yüksek etkinliğe sahip bir katalizör sentezlemektir. Çalışma kapsamında toz haline getirilmiş nar kabuğu üzerine etanol eklenerek, daha sonra üzerine sırasıyla belirli oranlarda (0.3 Pd (mg metal/g katalizör)),… Show more
“…Carbon-based materials have become increasingly popular as catalysts or catalyst supports because of their cost efficiency and environmentally friendly characteristics in recent times. These materials include microalgal species (Duman et al, 2020;Inal et al, 2021;Karakaş et al, 2021), coffee waste (Akdemir et al, 2021;Kaya, 2020a), apricot kernel shells , corn stalks (Bolat et al, 2021), cotton fibers (Ali et al, 2019), tea factory waste (Özarslan et al, 2021a; Özarslan et al, 2021b), pomegranate peels (Akdemir et al, 2022;Karakaş, 2021), banana peels (Karakaş et al, 2022), lake sludge (Bekirogullari et al, 2021), metallurgical waste sludge , and orange peels (Karakaş, 2022). Especially, metal-free catalysts provide numerous advantages over catalysts containing metals, stressing their abundance, cost-effectiveness, and sustainability.…”
Section: N a B Hmentioning
confidence: 99%
“…One of these was the study in which coffee waste was used as a catalyst for the methanolysis of NaBH4, and a hydrogen production rate of 13332 mL min −1 g.cat −1 was achieved at 60°C (Kaya, 2020b). Similarly, the pomegranate peel supported NH2/PdMnAg catalyst showed hydrogen production yields of 7209.4, 8689.6, 10324 and 11334 min −1 g.cat −1 at 30°C, 40°C, 50°C and 60°C, respectively (Karakaş, 2021).…”
Section: Effect Of Solution Temperature On Metal-free Coal Catalyst P...mentioning
In this study, a coal-based catalyst produced by protonating phosphoric acid was used as a metal-free catalyst for hydrogen production from sodium borohydride (NaBH4) methanolysis. Experiments were conducted with various acid concentrations, impregnation times, and carbonization temperatures and times in order to produce a metal-free coal catalyst with enhanced catalytic activity. The catalyst impregnated with 3M H3PO4 for 12 h and subsequently carbonized at 600°C for 90 min exhibited the highest catalytic activity. The hydrogen production at 60 °C methanolysis with 0.25 g of NaBH4 catalyzed by a metal-free coal catalyst was found to be 11,854 mL min−1g.cat−1. Additionally, the activation energy of the catalyst was determined to be 22.5 kJ mol-1.
“…Carbon-based materials have become increasingly popular as catalysts or catalyst supports because of their cost efficiency and environmentally friendly characteristics in recent times. These materials include microalgal species (Duman et al, 2020;Inal et al, 2021;Karakaş et al, 2021), coffee waste (Akdemir et al, 2021;Kaya, 2020a), apricot kernel shells , corn stalks (Bolat et al, 2021), cotton fibers (Ali et al, 2019), tea factory waste (Özarslan et al, 2021a; Özarslan et al, 2021b), pomegranate peels (Akdemir et al, 2022;Karakaş, 2021), banana peels (Karakaş et al, 2022), lake sludge (Bekirogullari et al, 2021), metallurgical waste sludge , and orange peels (Karakaş, 2022). Especially, metal-free catalysts provide numerous advantages over catalysts containing metals, stressing their abundance, cost-effectiveness, and sustainability.…”
Section: N a B Hmentioning
confidence: 99%
“…One of these was the study in which coffee waste was used as a catalyst for the methanolysis of NaBH4, and a hydrogen production rate of 13332 mL min −1 g.cat −1 was achieved at 60°C (Kaya, 2020b). Similarly, the pomegranate peel supported NH2/PdMnAg catalyst showed hydrogen production yields of 7209.4, 8689.6, 10324 and 11334 min −1 g.cat −1 at 30°C, 40°C, 50°C and 60°C, respectively (Karakaş, 2021).…”
Section: Effect Of Solution Temperature On Metal-free Coal Catalyst P...mentioning
In this study, a coal-based catalyst produced by protonating phosphoric acid was used as a metal-free catalyst for hydrogen production from sodium borohydride (NaBH4) methanolysis. Experiments were conducted with various acid concentrations, impregnation times, and carbonization temperatures and times in order to produce a metal-free coal catalyst with enhanced catalytic activity. The catalyst impregnated with 3M H3PO4 for 12 h and subsequently carbonized at 600°C for 90 min exhibited the highest catalytic activity. The hydrogen production at 60 °C methanolysis with 0.25 g of NaBH4 catalyzed by a metal-free coal catalyst was found to be 11,854 mL min−1g.cat−1. Additionally, the activation energy of the catalyst was determined to be 22.5 kJ mol-1.
“…60 o C sıcaklıkta elde ettiği hidrojen üretimi hızı 13332 ml dk -1 g -1 'dır. Karakaş [36] ise nar kabuğu destekli NH2/PdMnAg katalizörü varlığında NaBH4 metanolizini araştırdığı çalışmasında, 30, 40, 50 ve 60 o C deney sıcaklıklarında hidrojen üretimi verimlerinin sırasıyla 7209,4, 8689,6, 10324 ve 11334 ml dk -1 g -1 olduğunu tespit etmiştir. Reaksiyon süreleri sıcaklık arttıkça azalmıştır.…”
Section: Deney Sıcaklığının Hidrojen üRetimi üZerindeki Etkisiunclassified
Orijinal Bilimsel Makale
Bu çalışmada, asetik asit ile muamele edilmiş metal katkılı atık asfalt katalizörü kullanılarak sodyum bor hidrürün metanolizinde hidrojen sentezi gerçekleştirilmiştir. Farklı metal türleri denenerek en verimli metal türü belirlenmesinin ardından farklı oranlarda metal kullanılmış ve en etkin katalizör üretilmiştir. En verimli katalizör, 3M asetik asit ve % 30 Cu ile muamele edilmiş atık asfalt katalizörüdür. Seçilen katalizör varlığında, en yüksek hidrojen verimini elde etmek için farklı katalizör miktarları, farklı sodyum bor hidrür konsantrasyonları ve farklı sıcaklıklar kullanılarak deneyler yapılmış ve sonuçlar yorumlanmıştır. Maksimum hidrojen üretimi verimi 9518,3 mLdk-1g-1 ve katalizörün aktivasyon enerjisi 38,2 kj/mol olarak belirlenmiştir.
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