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Surface area evolution of calcium hydroxide during calcination and sintering
Author(s) -
Mai M. C.,
Edgar T. F.
Publication year - 1989
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.690350103
Subject(s) - calcination , sintering , sorbent , materials science , chemical engineering , specific surface area , porosity , calcium hydroxide , mineralogy , metallurgy , adsorption , composite material , chemistry , catalysis , organic chemistry , engineering
A simple one‐dimensional mathematical model validated with high‐temperature entrained‐flow reactor data successfully explained dispersed calcium hydroxide particle surface area evolution resulting from concomitant calcination and sintering. An integrated first‐order calcination rate expression and a second‐order sintering rate form accurately predicted time‐resolved surface area generation and degradation. The effects of water vapor and gaseous carbon dioxide concentration on asymptotic specific surface areas and sintering rates were noted. This methodology for predicting sorbent surface area evolution will enable more accurate sulfation modeling efforts in furnace sorbent injection (FSI) applications, where calcination, sintering, and sulfation can all occur on the same time scale.