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Reactivity of ashes from biomass combustion plant in biomass combusting atmospheres
Author(s) -
Cha S. C.
Publication year - 2007
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200603983
Subject(s) - combustion , alkali metal , chemistry , chloride , inductively coupled plasma , biomass (ecology) , fly ash , reactivity (psychology) , carbonate , inorganic chemistry , atmosphere (unit) , environmental chemistry , chemical engineering , geology , organic chemistry , plasma , medicine , physics , oceanography , alternative medicine , pathology , quantum mechanics , thermodynamics , engineering
Exposure tests were carried out to study the reactivity of filter and cyclone ashes from biomass combustion plant in the atmospheres of biomass combustion with variations of H 2 O and HCl‐content for 360 h at 535 °C. The changes of C‐, Cl‐ and S‐content of the exposed ashes were analyzed by inductively coupled plasma atom absorption spectroscopy (ICP‐AAS). The analysis of untreated filter and cyclone ashes showed that the cyclone ash was more aggressive than the filter ash. As a result, in the HCl containing atmosphere the alkali chloride, which can be formed from alkali carbonate and hydroxides as well as oxides, can additionally accelerate the oxidation process. In the HCl free atmosphere at increased H 2 O content, alkali carbonates and hydroxides can be formed, so enhanced alkali chloride induced oxidation will not occur. Furthermore, thermodynamic calculations between alkalis and gases were conducted.