Atık Katalitik Konvertörlerden Geri Kazanılmış Nano Boyutlu Seramik Tozlarının Epoksi Matriksli Kompozitlerde Katkı Malzemesi Olarak Değerlendirilmesi

Yıl 2024, , 87 - 93, 31.03.2024

Sinan Köse

https://doi.org/10.35229/jaes.1430375

Öz

Fosil yakıtlı araçların yanma sonrası egzoz gazlarında bulunan zararlı bileşenleri asgari düzeye indirgeyen katalitik konvertör sistemleri, platin, paladyum ve rodyum gibi değerli metallerin yanı sıra seramik gibi ekonomik değeri düşük malzemelerden oluşmaktadır. Kullanım ömürlerinin sonunda geri dönüşümleri hem içeriğindeki değerli metallerin ekonomiye tekrar kazandırılması hem de atık depolama gibi atık bertaraf sorunlarını ortadan kaldırmaktadır. Katalitik konvertörlerin içeriğindeki değerli metallerin tekrar geri kazanımları sırasında seramik gibi ekonomik değeri olmayan malzemeler atık olarak göz ardı edilmektedir. Araştırmalar, seramiklerin katkı malzemesi olarak kompozitlerde kullanımlarının termal iletkenlik özelliklerinde anlamlı iyileşmelere neden olduğunu ortaya koymuştur.
Bu çalışma ile; kullanım ömürleri tamamlanmış katalitik konvertörlerden elde edilen seramiklerin, kompozitlerde katkı malzemesi olarak değerlendirilmesini amaçlanmıştır. Değerli metalleri için geri dönüşüme tabi tutulan konvertörlerin artık seramik malzemeleri öğütülerek nano boyuta indirgenmiştir. Nano boyuttaki seramik tozları ağırlıkça %5, %10 ve %15 oranlarında epoksiye katkılanarak kompozit numuneleri elde edilmiştir. Bu numunelerin fiziksel, kimyasal ve mekanik özellikleri incelenerek birbirleriyle karşılaştırılmıştır.

Anahtar Kelimeler

Atık katalitik konvertör, Geri kazanılmış seramik tozu, Kompozit malzeme, Sürdürülebilir çevre

Evaluation of Nano-sized Ceramic Powders Recovered from Waste Catalytic Converters as Filler in Epoxy Matrix Composites

Öz

Catalytic converter systems, which minimize the harmful components in the exhaust gases of fossil fuel vehicles after combustion, consist of precious metals such as platinum, palladium, and rhodium as well as materials with low economic value such as ceramics. Their recycling at the end of their useful life eliminates both the recycling of the precious metals in their content to the economy and waste disposal problems such as waste storage. During the recycling of precious metals in catalytic converters, materials with no economic value such as ceramics are ignored as waste. Studies have shown that the use of ceramics as additives in composites leads to significant improvements in thermal conductivity properties.
This study aims to utilize ceramics obtained from end-of-life catalytic converters as additives in composites. The residual ceramic materials of the converters, which were recycled for their precious metals, were ground and reduced to nano size. Nano-sized ceramic powders were doped into epoxy at 5%, 10% and 15% by weight and composite samples were obtained. The physical, chemical and mechanical properties of these samples were analyzed and compared with each other.

Anahtar Kelimeler

Waste catalytic converter, Recycled ceramic powder, Composite material, Sustainable environment

Kaynakça

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