Open AccessThe effect of porosity on the reactivity of calcium sorbents
Author(s) -
Michał Wichliński,
Rafał Kobyłecki
Publication year - 2020
Publication title -
mineralogia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.152
H-Index - 9
eISSN - 1899-8291
pISSN - 1899-8526
DOI - 10.2478/mipo-2020-0004
Subject(s) - sorbent , sorption , porosity , chemistry , specific surface area , calcium looping , reactivity (psychology) , mineralogy , adsorption , chromatography , organic chemistry , medicine , alternative medicine , pathology , catalysis
The current work presents the results of seven sorbent samples investigated with respect to SO 2 capture. The sorbents’ reactivity and capacity indexes were determined, and the tests were carried out in accordance with the ‘classical’ procedure for limestone sorbents. The reactivity indexes (RIs) of the tested samples were in the range of 2.57 and 3.55 (mol Ca)/(mol S), while the absolute sorption coefficients as determined by the capacity index (CI) varied between 87.9 and 120.6 (g S)/(kg of sorbent). Porosimetric analysis was also carried out and the specific surface area of the samples was found to be between 0.2 and 1.7 m 2 /g. The number of micro-, meso- and macro-pores in individual samples was determined from the corresponding pore size distribution histograms, and the values of sorbent RIs and CIs were correlated with the samples’ total porosity and specific surface.