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15 - Gasification, pyrolysis, and combustion

Published online by Cambridge University Press:  04 February 2011

By
A. Paul Watkinson  and
Antonio C. L. Lisboa
Edited by
Norman Epstein  and
John R. Grace
Norman Epstein
Affiliation:
University of British Columbia, Vancouver
John R. Grace
Affiliation:
University of British Columbia, Vancouver
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Summary

A common set of reactions, given in Table 15.1, occurs when carbonaceous solids undergo thermal processing. Whether the aim is pyrolysis, gasification, or combustion, each of these reactions occurs in some parts of the reactor because of gas–solids contacting. In this chapter, we consider, in order, gasification as an endothermic process to generate H2 and CO mixtures for fuel or synthesis gas, pyrolysis as a process to generate useful tars (or liquids), and combustion as a process to produce heat.

Gasification background

Most commercial gasifiers use coal as feed, and may be classified by the type of solids–gas contacting (moving, entrained, fluidized, or spouted bed), by the state of the ash (dry, agglomerated, or molten), and by the oxidant (air, air–steam, or oxygen–steam). A low-calorific-value gas results from air–steam gasification, and a medium-calorific-value gas from using steam or steam–oxygen mixtures. The carbonaceous feedstock may be fed as a dry solid, a sludge, or a slurry.

Performance measures can be identified for comparing gasifiers of different designs and operating conditions. For production of fuel gases, the heating value of the produced gas is important and is usually reported on a dry gas basis. For synthesis gas or pure hydrogen production, the molar ratio of H2∕CO leaving the gasifier is critical. Low tar yields are usually beneficial, unless a raw fuel gas is desired. For sizing scaled-up gasification processes, throughput of solids feed per unit cross-section of reactor (kg/m2s) is of major importance.

Type
Chapter
Information
Spouted and Spout-Fluid Beds
Fundamentals and Applications
 , pp. 250 - 268
Publisher: Cambridge University Press
Print publication year: 2010

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References

Fernando, R.. Coal Gasification. International Energy Agency Clean Coal Centre Report CCC/140, Oct. 2008.
Foong, S. K., Lim, C. J., and Watkinson, A. P.. Coal gasification in a spouted bed. Can. J. Chem. Eng., 58 (1980), 84–91.CrossRefGoogle Scholar
Foong, S. K., Cheng, G., and Watkinson, A. P.. Spouted bed gasification of Western Canadian coals. Can. J. Chem. Eng., 59 (1981), 625–630.CrossRefGoogle Scholar
Watkinson, A. P., Cheng, G., and Prakash, C. B.. Comparison of coal gasification in fluidized and spouted beds. Can. J. Chem. Eng., 61 (1983), 468–473.CrossRefGoogle Scholar
Watkinson, A. P., Cheng, G., and Lim, C. J.. Oxygen-steam gasification of coals in a spouted bed. Can. J. Chem. Eng., 65 (1987), 791–798.CrossRefGoogle Scholar
Watkinson, A. P., Cheng, G., and Fung, D. P. C.. Gasification of oil sand coke. Fuel, 68 (1989), 4–10.CrossRefGoogle Scholar
Haji-Sulaiman, Z., Lim, C. J., and Watkinson, A. P.. Gas composition and temperature profiles in a spouted bed coal gasifier. Can. J. Chem. Eng., 64 (1986), 125–132.CrossRefGoogle Scholar
Kikuchi, K., Suzuki, A., Mochizuki, T., Endo, S., Imai, E., and Tanji, Y.. Ash-agglomerating gasification of coal in a spouted bed reactor. Fuel, 64 (1985), 368–372.CrossRefGoogle Scholar
Uemaki, O. and Tsuji, T.. Gasification of a sub-bituminous coal in a two-stage jet-spouted bed reactor. In Fluidization V, ed. Ostergaard, K. and Sorensen, A. (New York: Engineering Foundation, 1986), pp. 497–504.Google Scholar
Tsuji, T., Shibata, T., Yamaguchi, K., and Uemaki, O.. Mathematical modeling of spouted bed coal gasification. In Proceedings of the International Conference on Coal Science (Tokyo: New Energy Development Organization, 1989), pp. 457–460.Google Scholar
Tsuji, T. and Uemaki, O.. Coal gasification in a jet-spouted bed. Can. J. Chem. Eng., 72 (1994), 504–510.CrossRefGoogle Scholar
Gale, J. and Bower, C. J.. Development of the British Coal gasification process for the manufacture of low calorific value gas. Presented at Applied Energy Conference, Swansea, September 1989.
St, M.. Arnold, J., Gale, J. J., and Laughlin, M. K.. The British Coal spouted fluidised bed gasification process. Can. J. Chem. Eng., 70 (1992), 991–997.Google Scholar
Sue-A-Quan, T., Watkinson, A. P., Gaikwad, R. P., Lim, C. J., and Ferris, B. R.. Steam gasification in a pressurized spouted bed reactor. Fuel Proc. Technol., 27 (1991), 67–81.CrossRefGoogle Scholar
Sue-A-Quan, T., Cheng, G., and Watkinson, A. P.. Coal gasification in a pressurized spouted bed. Fuel, 74 (1995), 159–164.CrossRefGoogle Scholar
Hatate, Y., Uemura, Y., Tanaka, S., Tokumasu, Y., Tanaka, Y., King, D. F., and Ijichi, K.. Development of a spouted bed-type coal gasifier with cycling thermal medium particles. Soc. Chem. Engrs, Japan, 20 (1994), 758–764.Google Scholar
Xiao, R., Zhang, M., Jin, B., and Huang, Y.. High-temperature air/steam-blown gasification of coal in a pressurized spout-fluid bed. Energy & Fuels, 20 (2006), 715–720.CrossRefGoogle Scholar
Xiao, R., Zhang, M., Jin, B., Xiaong, Y., Zhou, H., Duan, Y., Zhong, Z., Chen, X., Shen, L., and Huang, Y. Air blown partial gasification of coal in a pilot plant pressurized spout-fluid bed reactor. Fuel, 86 (2007), 1631–1640.CrossRefGoogle Scholar
Moore, D. L., Haq, Z., Pinkston, T. E., Rush, R. E., Vimalchaud, P., McClung, J. D., and Quandt, M. T.. Status of the advanced PFBC at the Power Systems Development Facility. Report DOE/MC/25140–94/C0353 (1994), pp. 127–137.
Paterson, N., Zhuo, Y., Dugwell, D. R., and Kandiyoti, R.. Investigation of ammonia formation during gasification in an air-blown spouted bed: reactor design and initial tests. Energy & Fuels, 16 (2002), 127–135.CrossRefGoogle Scholar
Zhuo, Y., Paterson, N., Avid, B., Dugwell, D. R., and Kandyoti, R.. Investigation of ammonia formation during gasification in an air blown spouted bed: the effect of the operating conditions on ammonia formation and the identification of ways of minimizing its formation. Energy & Fuels, 16 (2002), 742–751.CrossRefGoogle Scholar
Paterson, N., Zhuo, Y., Reed, G. P., Dugwell, D. R., and Kandiyoti, R.. Pyrolysis and gasification of sewage sludge in a spouted-bed reactor. Water & Envir. J., 18 (2004), 90–94.CrossRefGoogle Scholar
Hanson, S., Patrick, J. W., and Walker, A.. The effect of coal particle size on pyrolysis and steam gasification. Fuel, 81 (2002), 531–547.CrossRefGoogle Scholar
Zak, C. and Nutcher, P. B.. Spouted fluid-bed gasification of biomass and chemical wastes-some pilot plant results. In Energy from Biomass and Wastes X, ed. Klass, D. K. (London: Elsevier and Chicago: Institute of Gas Technology, 1987), pp. 643–653.Google Scholar
,U.S. Environmental Protection Agency Report EPA/540/F-93/XXX. “Energy Technology Bulletin – Spouted Bed Reactor,” Energy and Environmental Research Corporation (Irvine, CA, 1993).
Thamavithya, M. and Dutta, A.. An investigation of MSW gasification in a spout-fluid bed reactor. Fuel Proc. Technol., 89 (2008), 949–957.CrossRefGoogle Scholar
Salam, P. A. and Bhattacharya, S. C.. A comparative study of charcoal gasification in two types of spouted bed reactors. Energy, 31 (2006), 228–243.Google Scholar
Hoque, M. M. and Bhattacharya, S. C.. Fuel characteristics of gasified coconut shell in a fluidized and a spouted bed reactor. Energy, 26 (2001), 101–110.CrossRefGoogle Scholar
Lim, C. J., Lucas, J. P., Haji-Sulaiman, M., and Watkinson, A. P.. A mathematical model of a spouted bed gasifier. Can. J. Chem. Eng., 69 (1991), 596–606.CrossRefGoogle Scholar
Lucas, J. P., Lim, C. J., and Watkinson, A. P.. A non-isothermal model of a spouted bed coal gasifier. Fuel, 77 (1998), 683–694.CrossRefGoogle Scholar
Song, B. H. and Watkinson, A. P.. Three-stage well-mixed reactor model for a pressurized coal gasifier. Can. J. Chem. Eng., 78 (2000), 143–155.CrossRefGoogle Scholar
Li, Q., Zhang, M., Zhong, W., Wang, X., Xiao, R., and Jin, B.. Simulation of coal gasification in a pressurized spout-fluid bed gasifier. Can. J. Chem. Eng., 87 (2009), 169–176.CrossRefGoogle Scholar
Barton, R. K., Rigby, G. R., and Ratcliffe, J. S.. The use of a spouted bed for the low temperature carbonization of coal. Mech. Chem. Eng. Trans., 4 (1968), 105–112.Google Scholar
Berti, L. P. and Gary, J. H.. Spouted bed oil shale retort. Colorado School of Mines Quart., 61 (1966), 553–560.Google Scholar
Tamm, P. W. and Kuehler, C. W., Spouted-bed shale retorting process. U.S. Patent 4,125,453 (1978).
Leite, A. C. B., Wodtke, R. M. P., Lisboa, A. C. L., and Restini, F.. Pyrolysis of oil shale fines in a spouted bed reactor. XVI Congresso Latino Americano de Quimica, Rio de Janeiro, October 1984.
Lisboa, A. C. L. and Watkinson, A. P.. Pyrolysis with partial combustion of oil shale fines in a spouted bed. Can. J. Chem. Eng., 70 (1992), 983–990.CrossRefGoogle Scholar
Teo, K. C. and Watkinson, A. P.. Rapid pyrolysis of Canadian coals in a miniature spouted bed reactor. Fuel, 65 (1986), 949–959.CrossRefGoogle Scholar
Jarallah, A. and Watkinson, A. P.. Pyrolysis of Western Canadian coals in a spouted bed. Can. J. Chem. Eng., 63 (1985), 227–236.CrossRefGoogle Scholar
Tam, T.. Pyrolysis of oil shale in a spouted bed pyrolyser. M.A.Sc. thesis, University of British Columbia (1987).
Rovero, G. and Watkinson, A. P.. A two-stage spouted bed process for auto-thermal pyrolysis or retorting. Fuel Proc. Technol., 26 (1990), 221–238.CrossRefGoogle Scholar
Aguado, R., Olazar, M., , M.José, San, Aguirre, G., and Bilbao, J.. Pyrolysis of sawdust in a conical spouted bed reactor. Yields and product composition, Ind. Eng. Chem. Res., 39 (2000), 1925–1933.CrossRefGoogle Scholar
Janarthanan, A. K. and Clements, L. D.. Gasification of wood in a pilot scale spouted bed gasifier. In Dev. Thermochem. Biomass Conversion, vol. 2, ed. Bridgwater, A. V. and Boocock, D. G. B. (Amsterdam: Kluwer Academic, 1997), pp. 945–959.CrossRefGoogle Scholar
Chen, M., Wang, J., Wang, X., Zhang, X., Zhang, S., Ren, Z., and Yan, Y.. Fast pyrolysis of biomass in a spout-fluidized bed reactor–analysis of composition and combustion characteristics of liquid product from biomass. Chin. J. Proc. Eng., 6 (2006), 192–96.Google Scholar
Jurewicz, J. and Lemoine, A.. Solid oxide fuel cell combustible by plasma spouted bed gasification of granulated biomass. Prep. Pap. Amer. Chem. Soc. Div. Fuel Chem., 49 (2004), 916–917.Google Scholar
Lim, C. J., Barua, S. K, Epstein, N., Grace, J. R., and Watkinson, A. P.. Spouted bed and spout-fluid bed combustion of solid fuels. In Fluidised Combustion: Is It Achieving Its Promise? Third International Fluidised Bed Combustion Conference, Institute of Energy, London (1984).
Zhao, J. C., Lim, C. J., and Grace, J. R. Coal burnout times in spouted and spouted-fluid beds. Chem. Eng. Res. Dev., 65 (1987), 426–429.Google Scholar
Zhao, J. C., Lim, C. J., and Grace, J. R.. Flow regimes and combustion behavior in coal-burning spouted and spout-fluid beds. Chem. Eng. Sci., 42 (1987), 2865–2875.CrossRefGoogle Scholar
Lim, C. J., Watkinson, A. P., Khoe, G. K., Low, S., Epstein, N., and Grace, J. R.. Spouted, fluidized and spout-fluid bed combustion of bituminous coals. Fuel, 67 (1988), 1211–1217.CrossRefGoogle Scholar
Shirley, F. W. and Litt, R. D. Advanced atmospheric fluidized-bed combustion design-spouted bed. Final Report to U.S. Department of Energy from Battelle Columbus Laboratories, February 1988.
Vuthaluru, H. B., Linjewille, T. M., Zhang, D., and Manzoori, A. R.. Investigations into the control of agglomeration and defluidisation during fluidised-bed combustion of low-rank coals. Fuel, 78 (1999), 419–425.CrossRefGoogle Scholar
Vuthaluru, H. B. and Zhang, D.. Control methods for remediation of ash-related problems in fluidised-bed combustors. Fuel Proc. Technol., 60 (1999), 145–156.CrossRefGoogle Scholar
Vuthaluru, H. B., Zhang, D., and Linjewile, T. M.. Behaviour of inorganic constituents and ash characteristics during fluidised-bed combustion of several Australian low-rank coals. Fuel Proc. Technol., 67 (2000), 165–176.CrossRefGoogle Scholar
Vuthaluru, H. B. and Zhang, D.. Effect of coal blending on particle agglomeration and defluidisation during spouted-bed combustion of low-rank coals. Fuel Proc. Technol., 70 (2001), 41–51.CrossRefGoogle Scholar
José, M. J. San, Aguado, M. J., Alvarez, S., and Bilbao, J.. Combustion of sawdust and forestry waste in conical spouted beds. Rev. de Inform. Tecnol. 13 (2002), 133–137.Google Scholar
Khoshnoodi, M. and Abidin, R. Z.. Utilization of Malaysian peat in spouted bed burner. In Proceedings of the 10th Malaysian Chemical Engineering Symposium (Penang: Institute of Chemical Engineers, Malaysia, 1994).Google Scholar
Altwicker, E. R., Konduri, R. K. N., and Milligan, M. S.. Spouted bed combustor for the study of heterogeneous hazardous waste incineration. AIChE Meeting, Philadelphia, Paper 82c (1989).
Baker, R. S. and Wilkinson, R. C.. The commercial development of spouted/fluidised bed combustion in Australia. In Fluidised Combustion: Systems and Applications. Institute of Energy Symposium Series, Vol. 1, No. 4 (1980), pp. 1–11.
Albina, D. O.. Combustion of rice husk in a multiple-spouted fluidized bed. Energy Sources, 25 (2003), 893–904.CrossRefGoogle Scholar
Albina, D. O., Emissions from multiple-spouted and spout-fluid beds using rice husks as fuel. Renew. Energy, 31 (2006), 2152–2163.CrossRefGoogle Scholar
Barz, M.. Sewage sludge combustion in a spouted bed cascade system. China Particuology, 1 (2003), 223–228.CrossRefGoogle Scholar
Rasul, M. G.. Spouted bed combustion of wood charcoal: performance comparison of three different designs. Fuel, 80 (2001), 2189–2191.CrossRefGoogle Scholar
Arbib, H. A. and Levy, A.. Combustion of low heating value fuels and wastes in the spouted bed. Can. J. Chem. Eng., 60 (1982), 528–531.CrossRefGoogle Scholar
Bilbao, J., Olazar, M., and José, M. J. San. Dispositivo para la combustion en continuo de residuos solidos, Oficina Espanola de Patentes y Marcas, 2,148,026 (2001), 9 pages.

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