Abstract
A small scale gas heat carrier pyrolysis fixed-reactor (6–9 kg h−1) was established. The pyrolysis temperature and residence time effect the dehydration process, pyrolysis products, caking property, and temperature profile characteristic. The dehydration process is completed below 300 °C. High temperature and short transfer distance shorten the pyrolysis time. With an increase in the final pyrolysis temperature, the yield of the volatiles and tar increases; however, that of the char decreases. The residence time significantly influences the char yield at 460 °C. The coal begins to agglomerate after 25 min at 460 °C for the first time. Agglomeration of the coal particles increases with an increase in the pyrolysis temperature and residence time. Based on the temperature profile, the temperature curve in the coking chamber can be divided into three stages: the rapid temperature-decline, coal temperature-increase stage, and coal temperature constant stage. The temperature of coal and gas achieves a short relative balance, which causes the temperature turning point between the first two stages. The exothermic heat makes the final temperature of coal higher than that of the inlet gas, thus the exothermic reaction cannot be ignored.
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References
Han, X., Kulaots, I., Jiang, X., & Suuberg, E. M. (2014). Review of oil shale semicoke and its combustion utilization. Fuel, 126, 143-161.
Soone, J., & Doilov, S. (2003). Sustainable utilization of oil shale resources and comparison of contemporary technologies used for oil shale processing.Oil Shale, 20(3; SUPP), 311-323.
Martignoni, W. P., & Rodrigues, W. J. B. (2002). Petrosix oil shale technology learning curve. In 26th Oil Shale Symposium, Proceedings, Poster (No. 18, pp. 16-20).
Yefimov, Y., & Doilov, S. (1999). Efficiency of processing oil shale in 1000 ton-per-day retort using different arrangement of outlets for oil vapors. Oil shale, 16(4S), 455-463.
Lu, K. M., Lee, W. J., Chen, W. H., Liu, S. H., & Lin, T. C. (2012). Torrefaction and low temperature pyrolysis of oil palm fiber and eucalyptus in nitrogen and air atmospheres. Bioresource technology, 123, 98-105.
Duan, L., Zhao, C., Zhou, W., Qu, C., & Chen, X. (2009). Investigation on coal pyrolysis in CO2 atmosphere. Energy & Fuels, 23(7), 3826-3830.
Mokhlisse, A., & Chanâa, M. B. (2000). Yields and composition of oil obtained by isothermal pyrolysis of the Moroccan (Tarfaya) oil shales with steam or nitrogen as carrier gas. Journal of Analytical and Applied Pyrolysis,56(2), 207-218.
Zhang, H., Xiao, R., Wang, D., He, G., Shao, S., Zhang, J., & Zhong, Z. (2011). Biomass fast pyrolysis in a fluidized bed reactor under N 2, CO 2, CO, CH 4 and H 2 atmospheres. Bioresource technology, 102(5), 4258-4264.
Ariunaa, A., Li, B. Q., Wen, L. I., Purevsuren, B., Munkhjargal, S., Liu, F. R., … & Gang, W. A. N. G. (2007). Coal pyrolysis under synthesis gas, hydrogen and nitrogen. Journal of Fuel Chemistry and Technology, 35(1), 1-4.
Zheng, H. J., Zhang, S. Y., Guo, X., Lu, J. F., Dong, A. X., Deng, W. X., … & Jin, T. (2014). An experimental study on the drying kinetics of lignite in high temperature nitrogen atmosphere. Fuel Processing Technology, 126, 259-265.
Guo, X., Lu, W., Dai, Z., Liu, H., Gong, X., Li, L., … & Guo, B. (2012). Experimental investigation into a pilot-scale entrained-flow gasification of pulverized coal using CO2 as carrier gas. Energy & Fuels, 26(2), 1063-1069.
Xu, Y., Zhang, Y., Wang, Y., Zhang, G., & Chen, L. (2013). Gas evolution characteristics of lignite during low-temperature pyrolysis. Journal of Analytical and Applied Pyrolysis, 104, 625-631.
Guo, Z., Zhang, L., Wang, P., Liu, H., Jia, J., Fu, X., … & Shu, X. (2013). Study on kinetics of coal pyrolysis at different heating rates to produce hydrogen. Fuel Processing Technology, 107, 23-26.
Tomeczek, J., & Gil, S. (2003). Volatiles release and porosity evolution during high pressure coal pyrolysis. Fuel, 82(3), 285-292.
Nomura, S., Kato, K., Nakagawa, T., & Komaki, I. (2003). The effect of plastic addition on coal caking properties during pyrolysis☆. Fuel,82(14), 1775-1782.
Fukada, K., Itagaki, S., & Shimoyama, I. (2006). Effect of rapid preheating on the caking properties of coals. ISIJ international, 46(11), 1603-1609.
Kök, M. V., Özbas, E., Karacan, O., & Hicyilmaz, C. (1998). Effect of particle size on coal pyrolysis. Journal of Analytical and Applied Pyrolysis,45(2), 103-110.
Gold, P. I. (1980). Thermal analysis of exothermic processes in coal pyrolysis. Thermochimica Acta, 42(2), 135-152.
Di Blasi, C., Branca, C., Masotta, F., & De Biase, E. (2013). Experimental analysis of reaction heat effects during beech wood pyrolysis. Energy & Fuels, 27(5), 2665-2674.
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Wang, Y. et al. (2016). Gas heat carrier pyrolysis of low rank coal and associated heat transfer characteristics. In: Litvinenko, V. (eds) XVIII International Coal Preparation Congress. Springer, Cham. https://doi.org/10.1007/978-3-319-40943-6_113
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DOI: https://doi.org/10.1007/978-3-319-40943-6_113
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