Tuncbilek Linyitlerinin Kimyasal Çevrim Oksidasyonu Sırasında CoPb Metal Oksitlerin Oksijen Transfer Yetenekleri

Bu çalışma, kobalt-kurşun (Co-Pb) karışık metal oksitlerin Tuncbilek linyitlerininin inert ortamda termal bozunması esnasında göstermiş oldukları oksijen transfer yeteneğini belirlemeyi amaçlamaktadır. Bu metal oksitlerin indirgenme reaksiyonu termodinamik hesaplamaları farklı indirgeyici gazlar için uygun sıcaklıkları belirlemek için yapılmıştır. Co-Pb karışık metal oksitler ıslak emdirme yöntemiyle hazırlanmış ve X-ray kırınımı ve Raman spektrometresi ile karakterize edilmiştir. Bu metal oksitlerin oksijen transfer performansları Termal Gravimetric Analiz (TGA) metoduyla 40-600ºC sıcaklık aralığında azot atmosferinde gerçekleştirilmiştir. TGA sonuçları optimum linyit/ Co-Pb mixed oxide oranının 0.11 olduğunu ortaya koymuştur.

Oxygen Transfer Ability of Co-Pb Metal Oxides during the Chemical Looping Oxidation of Tuncbilek Lignite

The study aims to determine the oxygen transfer ability of cobalt lead (Co-Pb) mixed oxides during the thermal decomposition ofTuncbilek lignite under inert atmosphere. Thermodynamic calculations of reduction reactions of Co-Pb mixed oxides were performedto show the favorable reduction temperatures for the different reductive gases. Co and Pb mixed metal oxides were prepared by wetimpregnation method and they characterized by X-ray diffractometer and Raman spectroscopy. Oxygen transfer performances of theseoxides were evaluated by thermal gravimetric analysis (TGA) in terms of oxidation rates of lignite sample under N2 flows in the rangeof temperatures between 40 to 600ºC. The results of thermal gravimetric analysis (TGA) indicated that the optimum coal to Co-Pb metaloxides ratio based on oxidation efficiency was 0.11.

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