The Release Behavior of Potassium and Sodium in the Biomass High-Temperature Entrained-Flow Gasification

Abstract:

Experiments were performed to investigate the release behavior of potassium and sodium in the biomass high-temperature entrained-flow gasification with the addition of acid oxide SiO₂, basic oxide MgO, amphoteric oxide Al₂O₃. The results showed that the volatilization of alkali was found to strongly depend on temperature. High gasification temperature strengthened the alkali release. When the reactor temperature was 1200°C, the volatilization of alkali species were about 37.87% for K and 71.14% for Na. Three additives all favored the retention of potassium and sodium and the content of water-soluble potassium and sodium in the ash. Among the three additives, MgO had the best retention effect. The potassium and sodium content in the gas phase was as low as 46.6% and 67.3% compared with raw straw, respectively. In the entrained-flow gasification with short residence time, the additives retained more alkali metals by the physical and chemical adsorption. Part of the additive utilized as physical adsorbent during the gasification enhanced the ash melting point of the residue carbon.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 2434-2441
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.2434
• Online since: July 2011
• Authors: Qing Chen, Jin Song Zhou, Qin Feng Mei, Zhong Yang Luo
• Keywords: Alkali Release, Biomass, Gasification, Retention

References

[1] M.J.A. Tijmensen, A.P.C. Faaij, C.N. Hamelinck et al.: Biomass Bioenerg Vol. 23(2002), pp.129-52.

[2] H. Marschner, Mineral nutrients in higher plants. 2nd ed. London: Academic Press (1995).

[3] A. Jensen, K. Dam-Johansen, M.A. Wójtowicz et al.: Energy Fuels Vol. 12(1998), pp.929-938.

[4] Y. Xie, L. Shen, J. Xiao et al.: Energy Fuels Vol. 23 (2009), pp.5199-5205.

[5] S. Arvelakis, H. Gehrmann, M. Beckmann et al.: Biomass Bioenerg Vol. 28(2005), pp.331-338.

[6] Specification for fuel gases for combustion in heavy-duty gas turbines. Document GEI 41040i, General Electric Company, (2005).

[7] M.J.A. Tijmensen, A.P.C. Faaij, C.N. Hamelinck et al.: Biomass Bioenerg Vol. 23(2002), pp.129-152.

[8] S.C. van Lith, V. Alonso- Ramírez, P.A. Jensen et al.: Energy Fuels Vol. 20(2006), pp.964-978.

[9] D.C. Dayton, T.A. Milne, in: Laboratory Measurements of Alkali Metal Containing Vapors Released during Biomass Combustion. In Applications of Advanced Technology to Ash-Related Problems in Boilers, edited by L. Baxter, R. DeSollar, Plenum Press, New York(1996).

DOI: 10.1007/978-1-4757-9223-2_11

[10] J.G. Olsson, U. Jäglid, J.B.C. Pettersson: Energy Fuels Vol. 11(1997), pp.779-784.

[11] O. Hirohata, T. Wakabayashi, K. Tasaka et al.: Energy Fuels Vol. 22 (2008), pp.4235-4239.

[12] D.M. Keown, G. Favas, J. Hayashi et al.: Bioresour. Technol Vol. 96(2005), pp.1570-1577.

[13] J.N. Knudsen, P.A. Jensen, K. Dam-Johansen: Energy Fuels Vol. 18(2004), pp.1385-1399.

[14] I. De Bari, D. Barisano, M. Cardinale et al.: Energy Fuels Vol. 14(2000), pp.889-898.

[15] Chunjiang Yu, Yanling Tang, Mengxiang Fang et al.: Journal of Zhejiang University (Engineering Science) Vol. 39 (2005), pp.1435-1438, in Chinese.

[16] X Wei, U Schnell, K. R.G. Hein: Fuel Vol. 84(2005), pp.841-848.

[17] L.L. Baxter, T.R. Miles, T.R. Miles Jr et al.: Fuel Process. Technol Vol. 54(1998), pp.47-78.

[18] Jinsong Zhou, Hui Zhao, Xiaowei Cao et al.: Acta Energiae Solaris Sinica Vol. 29(2008), pp.1406-1413, in Chinese.

[19] Jinsong Zhou, Hui Zhao, Xiaowei Cao et al.: Journal of Zhejiang University (Engineering Science) Vol. 43(2009), pp.128-134, in Chinese.

[20] T. Wigmans, H. Haringa: Fuel Vol. 62(1983), pp.209-212.

[21] Chunjiang Yu, Zhongyang Luo, Wennan Zhang et al.: Journal of fuel chemistry and technology Vol. 28(2000), pp.420-425, in Chinese.

[22] K. Matsumoto, K. Takeno, T. Ichinose et al.: Energy Fuels Vol. 24(2010), p.1980-(1986).