Abstract
In this study, dynamic diffusion and adsorption behavior of volatile organic compound (VOC), toluene, in various gypsums having porous structure were investigated by a single-pellet moment technique. The experimental studies were performed a one sided single-pellet Wicke-Kallenbach diffusion/adsorption cell at atmospheric pressure. Nitrogen was used as carrier gas. The gas analyses of VOCs were measured by using GC. 2 µl pulses of toluene were injected in the cell inlet. The signals
References
- Alyüz, B. ve Veli, S., (2006). İç Ortam Havasında Bulunan Uçucu Organik Bileşikler ve Sağlık Üzerine Etkileri, Environment Engineering Science, 7, 109-116.
- Cox, S.S., Zhao, D. and Little J.C., (2001). Measuring Partition and Diffusion Coefficients for Volatile Organic Compounds in Vinyl Flooring, Atmospheric Environment, 35, 3823-3830.
- Doğu, T.,Yaşyerli, N.,Doğu, G., McCoy, B.J. and Smith, J.M., (1996). One-sided Single-pellet Technique for Adsorption and Intraparticle Diffusion, AIChE J., 42, 516-523.
- Huang, H. and Haghighat, F., (2003). Building Materials VOC Emissions-a Systematic Parametric Study, Building and Environment, 38, 995-1005.
- Kwon, S. H. and Cho, D., (2013). A Study on Isothermal Adsorption of VOCs Onto Gypsum Mortar Incorporating Oyster Shell, Clean Tecnology, 19, 134-139.
- Luo, R. and Niu, J.L., (2006). Determining Diffusion and Partition Coefficients of VOCs in Cement using one FLEC, Building and Environment, 41, 1148-1160.
- Meininghaus, R. and Uhde, E., (2002). Diffusion Studies of VOC Mixtures in a Building Material, Indoor Air, 12, 215-222.
- Ruthven, D.M., (1984). Principles of Adsorption and Adsorption Processes, John Wiley, New York.
- Tang, S.W., Chen, E., Li, Z.J. and Shao, H.Y., (2014). Assessment of Steady State Diffusion of Volatile Organic Compounds in Unsaturated Building Materials Based on Fractal Diffusion Model, Building and Environment, in-press.
- Vural, M.S. ve Balanlı, A., (2005). Yapı Ürünü Kaynaklı İç Hava Kirliliği ve Risk Değerlendirme de Ön Araştırma, Megaron Yıldız Teknik Üniversitesi, Mimarlık Fakültesi Dergisi, 1, 28-39.
- Xu, J., Zhang and Jianshun S., (2011). An Experimental Study of Relative Humidity Effect on VOCs’ Effective Diffusion CoefŞcient and Partition CoefŞcient in a Porous Medium, Building and Environment., 46, 1785-1796.
- Xu, J., Zhang, Jianshun S., Liu, X. and Gao1, Z., (2012). Determination of Partition and Diffusion Coefficients of Formaldehyde in Selected Building Materials and Impact of Relative Humidity, Journal of Air and Waste Management Association, 62, 671-679.
- Yang, X.,Chen, Q., Zhang, J.S., An, Y., Zeng, J. and Shaw, C.Y., (2001). A Mass Transfer Model for Simulating VOC Sorption on Building Materials, Atmospheric Environment, 35, 1291-1299.
- Yaşyerli, N., Doğu, G., Doğu, T. and McCoy, B.J., (1999). Pulse-response Study for the Humidity Effect on Sorption of Ethyl Bromide on Clays, American Institute of Chemical Engineering J., 45, 291- 298.
Abstract
Bu çalışmada, bir uçucu organik bileşik (UOB) olan toluenin gözenekli yapıdaki çeşitli alçılarda dinamik difüzyon ve adsorpsiyon davranışı tek pelet moment tekniği ile incelenmiştir. Deneysel çalışmalar bir taraflı tek pelet Wicke-Kallenbach tipi bir difüzyon/adsorpsiyon hücresinde ve atmosfer basıncında gerçekleştirilmiştir. Taşıyıcı gaz olarak azot kullanılmıştır. Gaz analizleri GC’de yapılmıştır. Hücre girişinden 2 µl hacminde toluen pulse olarak enjekte edilmiştir. GC dedektöründen alınan elektriksel sinyaller veri toplama kartı ve bilgisayar ile tepki piklerine dönüştürülmüştür. Elde edilen cevap piklerinin analizi ile toluenin adsorpsiyon denge sabiti ve etkin difüzyon katsayıları hesaplanmıştır. Deneyler 8.34x10-7-2.92x10-6 m3/s farklı akış hızlarında ve 298-333 K sıcaklık aralığında gerçekleştirilmiştir. Sonuçlardan toluen adsorpsiyonunun sıcaklıkla azaldığı görülmüştür. Toluen en yüksek inşaat alçısı ve makine sıva alçılarında en düşük ısı yalıtım alçısında adsorplanmıştır. Toluenin çeşitli alçı peletlerindeki etkin difüzyon katsayıları ise artan sıcaklıkla artmıştır.
References
- Alyüz, B. ve Veli, S., (2006). İç Ortam Havasında Bulunan Uçucu Organik Bileşikler ve Sağlık Üzerine Etkileri, Environment Engineering Science, 7, 109-116.
- Cox, S.S., Zhao, D. and Little J.C., (2001). Measuring Partition and Diffusion Coefficients for Volatile Organic Compounds in Vinyl Flooring, Atmospheric Environment, 35, 3823-3830.
- Doğu, T.,Yaşyerli, N.,Doğu, G., McCoy, B.J. and Smith, J.M., (1996). One-sided Single-pellet Technique for Adsorption and Intraparticle Diffusion, AIChE J., 42, 516-523.
- Huang, H. and Haghighat, F., (2003). Building Materials VOC Emissions-a Systematic Parametric Study, Building and Environment, 38, 995-1005.
- Kwon, S. H. and Cho, D., (2013). A Study on Isothermal Adsorption of VOCs Onto Gypsum Mortar Incorporating Oyster Shell, Clean Tecnology, 19, 134-139.
- Luo, R. and Niu, J.L., (2006). Determining Diffusion and Partition Coefficients of VOCs in Cement using one FLEC, Building and Environment, 41, 1148-1160.
- Meininghaus, R. and Uhde, E., (2002). Diffusion Studies of VOC Mixtures in a Building Material, Indoor Air, 12, 215-222.
- Ruthven, D.M., (1984). Principles of Adsorption and Adsorption Processes, John Wiley, New York.
- Tang, S.W., Chen, E., Li, Z.J. and Shao, H.Y., (2014). Assessment of Steady State Diffusion of Volatile Organic Compounds in Unsaturated Building Materials Based on Fractal Diffusion Model, Building and Environment, in-press.
- Vural, M.S. ve Balanlı, A., (2005). Yapı Ürünü Kaynaklı İç Hava Kirliliği ve Risk Değerlendirme de Ön Araştırma, Megaron Yıldız Teknik Üniversitesi, Mimarlık Fakültesi Dergisi, 1, 28-39.
- Xu, J., Zhang and Jianshun S., (2011). An Experimental Study of Relative Humidity Effect on VOCs’ Effective Diffusion CoefŞcient and Partition CoefŞcient in a Porous Medium, Building and Environment., 46, 1785-1796.
- Xu, J., Zhang, Jianshun S., Liu, X. and Gao1, Z., (2012). Determination of Partition and Diffusion Coefficients of Formaldehyde in Selected Building Materials and Impact of Relative Humidity, Journal of Air and Waste Management Association, 62, 671-679.
- Yang, X.,Chen, Q., Zhang, J.S., An, Y., Zeng, J. and Shaw, C.Y., (2001). A Mass Transfer Model for Simulating VOC Sorption on Building Materials, Atmospheric Environment, 35, 1291-1299.
- Yaşyerli, N., Doğu, G., Doğu, T. and McCoy, B.J., (1999). Pulse-response Study for the Humidity Effect on Sorption of Ethyl Bromide on Clays, American Institute of Chemical Engineering J., 45, 291- 298.
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | November 12, 2015 |
| Published in Issue | Year 2015 Volume: 16 Issue: 2 |
