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Experimental validation of a mathematical model for fixed‐bed desulfurization
Author(s) -
Efthimiadis Evangelos A.,
Sotirchos Stratis V.
Publication year - 1993
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690390111
Subject(s) - flue gas desulfurization , sorbent , porosimetry , porosity , thermogravimetric analysis , diffusion , adsorption , chemical engineering , materials science , chemistry , mineralogy , porous medium , thermodynamics , composite material , organic chemistry , physics , engineering
Porous particles of two commercially available ZnO sorbents differing in porosity, surface area, and pore‐size distribution were reacted with H 2 S at 500 and 600°C in a fixed‐bed reactor. Concentration breakthrough curves were determined by analyzing the effluent of the reactor using a gas chromotograph equipped with thermal conductivity and flame photometric detectors. The pore structure of samples collected from different positions in the reactor was analyzed by mercury porosimetry and gas adsorption to determine the variation of the average structural properties of the sorbent with the length of the reactor. The obtained experimental data were used to validate a fixed‐bed desulfurization model, which employs detailed submodels for diffusion, reaction, and structure evolution in the porous sorbent particles. With the various parameters appearing in the submodels determined from independent thermogravimetric reactivity evolution experiments, the fixed‐bed desulfurization model was found to be capable of providing an excellent description of the behavior of the desulfurization sorbents in a fixed‐bed reactor.