Alkali emissions characterization in chemical looping combustion of wood, wood char, and straw fuels

نویسندگان

چکیده

Chemical looping combustion of wood pellets (WP), char (WC), and straw (SP) was conducted in a 60 kW CLC pilot with ilmenite braunite oxygen carriers (OCs). Alkali emissions were investigated impactor-based surface ionization detector (SID) measurements. Particle size distributions for WP WC fuels dominated by coarse particles formed refractory species. For SP fuel, the distribution bimodal distinct fine particle mode nucleation volatile ash Thermodynamic modelling stable alkali species at 800 °C predicted that high KOH(g) lower concentrations KCl(g) are fuels. equilibrium K condensed-phase species, followed KCl(g), KOH(g). Modelling fuel-OC interactions showed decreases levels KCl(g). Braunite impacted only levels. Impactor sample leachate analysis WP-braunite operation, contained KCl, NaCl, KOH, NaOH, decreasing order. WC-ilmenite samples KOH KCl. most detected alkalis cases, speciation impactor qualitatively agreed predictions. SID measurements reasonable agreement WC-braunite SP-braunite tests.

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ژورنال

عنوان ژورنال: Fuel Processing Technology

سال: 2022

ISSN: ['1873-7188', '0378-3820']

DOI: https://doi.org/10.1016/j.fuproc.2022.107447