{"title":"Electric Field Impact on the Biomass Gasification and Combustion Dynamics ","authors":"M. Zake, I. Barmina, A. Kolmickovs, R. Valdmanis ","volume":103,"journal":"International Journal of Chemical and Molecular Engineering","pagesStart":822,"pagesEnd":829,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10001811","abstract":"
Experimental investigations of the DC electric field effect on thermal decomposition of biomass, formation of the axial flow of volatiles (CO, H2, CxHy), mixing of volatiles with swirling airflow at low swirl intensity (S ≈ 0.2-0.35), their ignition and on formation of combustion dynamics are carried out with the aim to understand the mechanism of electric field influence on biomass gasification, combustion of volatiles and heat energy production. The DC electric field effect on combustion dynamics was studied by varying the positive bias voltage of the central electrode from 0.6 kV to 3 kV, whereas the ion current was limited to 2 mA. The results of experimental investigations confirm the field-enhanced biomass gasification with enhanced release of volatiles and the development of endothermic processes at the primary stage of thermochemical conversion of biomass determining the field-enhanced heat energy consumption with the correlating decrease of the flame temperature and heat energy production at this stage of flame formation. Further, the field-enhanced radial expansion of the flame reaction zone correlates with a more complete combustion of volatiles increasing the combustion efficiency by 3% and decreasing the mass fraction of CO, H2 and CxHy in the products, whereas by 10% increases the average volume fraction of CO2 and the heat energy production downstream the combustor increases by 5-10% <\/p>\r\n","references":"[1] L. David Roper. Future World Energy, 2015.\r\nhttp:\/\/www.roperld.com\/science\/energyfuture.htm\r\n[2] J. Capellan-Perez, M. Mediavilla, C. de Castro, O. Carpintero, L.J.\r\nMiguel. Fossil fuel depletion and socio-economic scenarios: an\r\nintegrated approach, Energy, 2014, vol. 77, pp. 641-666.\r\n[3] Roger A. Sedjo. Comparative life cycle assessments: carbon neutrality\r\nand wood biomass energy, Resurces for the Future DP13-11,\r\nWashington, 2013, pp. 1-21, http:\/\/www.rff.org\/RFF\/Documents\/RFFDP-13-11.pdf\r\n\r\n[4] M. Za\u0137e, I. Barmina, V. Krishko, M. Gedrovics, A. Desc\u0146ickis.\r\nExperimental Study of the Combustion Dynamics of Renewable &\r\nFossil Fuel Co-Fire in Swirling Flame. Latvian Journal of Physics and\r\nTechnical Science, Nr. 6, 2009, pp. 3-15.\r\nhttp:\/\/www.degruyter.com\/view\/j\/lpts.2009.46.issue-6\/v10047-009-\r\n0024-z\/v10047-009-0024-z.xml\r\n[5] Gray Davis, Biomass Co- firing with Natural Gas in California, report\r\nP500-02-050F, 2002, pp.36: http:\/\/www.energy.ca.gov\/reports\/2002-11-\r\n12_500-02-050F.PDF\r\n[6] Barmina I., Lickrastina A., Purmalis M., Zake M., Valdmanis R.,\r\nValdmanis J., Effect of biomass high-frequency pre-treatment on\r\ncombustion characteristics\/\/ Chemical Engineering Transactions, vol.29,\r\n2012, pp. 895-900.\r\n[7] B. Lanigan, V. Budarin, J. Clark, P. Shuttleworth, F. Deswarte, A.\r\nWilson. Microwave processing as a green and energy efficient\r\ntechnology of energy and chemicals from biomass and energy crops.\r\nAspects of Applied Biology, vol. 90 (2008), pp. 277-282.\r\n[8] J. Lawton and F. Weinberg, Electrical Aspects of Combustion,\r\nClarendon Press, Oxford, UK, 1969.\r\n[9] Jaggers H.C., Von Engel A., 1971, The Effect of Electric Fields on the\r\nBurning Velocity of Various Flames. In: Combustion and Flame, vol.\r\n16, 275-285.\r\n[10] M. Zake, I. Barmina, A. Meijere, Electric Control of Combustion and\r\nFormation of Polluting Emissions by Co-Firing the Renewable with\r\nFossil Fuel, Magentohydrodynamics, 2005, N3, pp. 255-271.\r\n[11] I. Barmina, A. Desnickis, M. Zake,The Influence of the Electric Field on\r\nthe Development of the Swirling Flame Velocity Field and Combustion\r\nCharacteristics, Journal of Heat Transfer Research, vol. 39, N 5, 2008,\r\nbegell housepublishers, pp.371-378.\r\n[12] I. Barmina, M. Za\u0137e, R. Valdmanis, Electric Field-Induced Variations of\r\nCombustion Dynamics, Chemical Engineering Transactions, 2014, vol.\r\n39, pp.1531-1536.\r\n[13] M.Abricka, I. Barmina, R. Valdmanis, M. Za\u0137e, Experimental and\r\nnumerical study of swirling flows and flame dynamics, Latvian Journal\r\nof Physics and Technical Sciences, 2014, vol. 4, 25-41.\r\n[14] J. Colannino (2012), Electrodynamic Combustion ControlTM\r\nTechnology, A Clear Sign White Paper, pp. 1-11, ClearSign Combustion\r\nCorporation, Seattle, www.clearsigncombustion.com\r\n[15] M. Zake, D. Turlajs, M. Purmals. Electric field control of NOx formation\r\nin the flame channel flows, Global Nest: the International Journal, vol. 2,\r\nN1, 99-109. ","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 103, 2015"}