Abstract
Karbondioksit ve karbondioksit+su buharı atmosferlerin de pirit mineralinin termal bozunma kinetiği incelendi. Bu amaçla elektrikle ısıtılan yatay bir boru fırın kullanıldı. Numune taşıyıcı içinde tek sıra oluşturacak şekilde fırına konan pirit taneciklerinin bozunma hızı üzerine; gaz akış hızı, sıcaklık, süre ve gaz bileşiminin etkileri incelendi. Reaksiyon ilerleyişi, deney sonunda elde edilen katı ürünün kimyasal analizi ile izlendi. Bozunma reaksiyonunun ‘‘büzülen çekirdek modeli’’ ile uyum sağladığı ve farklı hız kontrol basamaklı iki bölgeye ayrılabildiği bulunmuştur
References
- Anonymous, 1980. Gmelins handbuch der anorganischen chemie. Aufflage Ed. Gmelins Institut, Frankfurt am Main, Verlag Chemie GMBH, Berlin, 59: 390.
- Bhargava, S.K., Garg, A., Subasinghe, N.D., 2009. In situ high- temperature phase transformation studies on pyrite. Fuel, 88: 988-993.
- Boyabat, N., Özer, A.K., Bayrakçeken, S., Gülaboğlu, M.Ş., 2003. Thermal decomposition of pyrite in the nitrogen atmosphere. Fuel, 85: 179-188.
- Boyabat, N., Özer, A.K., Bayrakçeken, S., Gülaboğlu, M.Ş., 2009. Piritin N2 atmosferinde ısıl bozunmasına su buharının etkisi. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, 15(3): 427-432.
- Bronikowski, T., 1984. Model selection for aqueous slurry coal de- sülphurization. Fuel, 63: 116-120.
- Levenspiel, O., 1999. Chemical reaction engineering. Third Editi- on, Chap. 25: 568-577.
- Monterio, J.L.F., 1981. Thermal decomposition of pyrite in a flu- idized bed. The Canadian Journal of Chemical Engineering, 59: 511-516.
- Tsai, SC, 1982. Fundamentals of coal beneficiation and utilization. Elsevier, Amsterdam-Oxford, 233-243.
- Yan, J., Xu, L., Yang, J., 2008. A study on the thermal decompositi- on of coal-derived pyriyte. Journal of Analytical and Applied pyrolysis, 82: 229-234.
Abstract
Thermal decomposition kinetics of pyrite in carbon dioxide and carbon dioxide + steam environments
has been investigated. For this propose, an electrically heated horizontal tube furnace was used. The effects of gas
flow rate, reaction temperature, time and gas composition on decomposition rate of spherical pyrite particles, which
were placed in the furnace in sample holder as evenly spread with single layer, were determined. The extend of
reaction was measured after each experiment by chemical analysis of solid residue obtained. The decomposition
reaction is well represented by the ‘‘shrinking core’’ model and can be divided into two region with different rate
controlling step.
References
- Anonymous, 1980. Gmelins handbuch der anorganischen chemie. Aufflage Ed. Gmelins Institut, Frankfurt am Main, Verlag Chemie GMBH, Berlin, 59: 390.
- Bhargava, S.K., Garg, A., Subasinghe, N.D., 2009. In situ high- temperature phase transformation studies on pyrite. Fuel, 88: 988-993.
- Boyabat, N., Özer, A.K., Bayrakçeken, S., Gülaboğlu, M.Ş., 2003. Thermal decomposition of pyrite in the nitrogen atmosphere. Fuel, 85: 179-188.
- Boyabat, N., Özer, A.K., Bayrakçeken, S., Gülaboğlu, M.Ş., 2009. Piritin N2 atmosferinde ısıl bozunmasına su buharının etkisi. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, 15(3): 427-432.
- Bronikowski, T., 1984. Model selection for aqueous slurry coal de- sülphurization. Fuel, 63: 116-120.
- Levenspiel, O., 1999. Chemical reaction engineering. Third Editi- on, Chap. 25: 568-577.
- Monterio, J.L.F., 1981. Thermal decomposition of pyrite in a flu- idized bed. The Canadian Journal of Chemical Engineering, 59: 511-516.
- Tsai, SC, 1982. Fundamentals of coal beneficiation and utilization. Elsevier, Amsterdam-Oxford, 233-243.
- Yan, J., Xu, L., Yang, J., 2008. A study on the thermal decompositi- on of coal-derived pyriyte. Journal of Analytical and Applied pyrolysis, 82: 229-234.
Details
| Primary Language | Turkish |
|---|---|
| Subjects | Engineering |
| Journal Section | Kimya / Chemistry |
| Authors | |
| Publication Date | September 30, 2012 |
| Submission Date | July 31, 2012 |
| Acceptance Date | August 13, 2012 |
| Published in Issue | Year 2012 Volume: 2 Issue: 3 |