Title: Analysis of combustion characteristics using CPFD in 0.1 MW_th oxy-fuel CFB

Authors: E.S. Go; H.W. Kim; S.Y. Kang; S.I. Keel; J.L.J. Ling; S.H. Lee

Addresses: Department of Environment and Energy, Jeonbuk National University, 567, Baekje-daero, Jeonju-si, Jeollabuk-do, 54896, South Korea ' Department of Environment and Energy, Jeonbuk National University, 567, Baekje-daero, Jeonju-si, Jeollabuk-do, 54896, South Korea ' Department of Mineral Resources Energy Engineering, Jeonbuk National University, 567, Baekje-daero, Jeonju-si, Jeollabuk-do, 54896, South Korea ' Environment System Research Division, Korea Institute of Machinery and Materials, 156, Gajeongbuk-ro, Yuseong-gu, Dajeon, 34103, South Korea ' Department of Mineral Resources Energy Engineering, Jeonbuk National University, 567, Baekje-daero, Jeonju-si, Jeollabuk-do, 54896, South Korea ' Department of Mineral Resources and Energy Engineering, Jeonbuk National University, 567, Baekje-daero, Jeonju-si, Jeollabuk-do, 54896, South Korea; Department of Environment and Energy, Jeonbuk National University, 567, Baekje-daero, Jeonju-si, Jeollabuk-do, 54896, South Korea

Abstract: This study used computational particle-fluid dynamic (CPFD) analysis techniques to analyse the fluidisation and reaction characteristics in a 0.1 MW_th oxy-fuel circulating fluidised bed (oxy-CFB) combustor. An oxy-CFB 3-dimensional model incorporated with various reaction kinetic models as stated in previous studies is used to predict the flue gas compositions. The gas and solid profiles in the oxy-CFB combustor shows a typical CFB structure consisted of dense and lean phase in the combustion chamber. Furthermore, the formation of CaSO₄ particles is evidence of a direct desulfurisation reaction between CaCO₃ and SO₂ in the oxy-CFB combustor. As a result, a continuous direct desulfurisation of CaCO₃ occurred in the reactor, which is expected to achieve maximum conversion in the long term.

Keywords: circulating fluidised bed; oxy combustion; coal; limestone; CPFD; computational simulation; desulfurisation.

DOI: 10.1504/IJNT.2022.122369

International Journal of Nanotechnology, 2022 Vol.19 No.1, pp.63 - 74

Published online: 21 Apr 2022 *

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