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2014 ; 7
(4
): 2561-2576
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Assessment of the Pozzolanic Activity of a Spent Catalyst by Conductivity
Measurement of Aqueous Suspensions with Calcium Hydroxide
#MMPMID28788583
Velázquez S
; Monzó JM
; Borrachero MV
; Payá J
Materials (Basel)
2014[Mar]; 7
(4
): 2561-2576
PMID28788583
show ga
The pozzolanic activity of the spent catalyst produced by fluid catalytic
cracking (FCC) has been studied by various methods in recent years. However, no
quick and easy method has been reported for this activity based on the associated
studies. In this work, the pozzolanic activity of a spent catalyst was
investigated by measuring its electrical conductivity in aqueous suspensions of
pozzolan/calcium hydroxide. The behavior of the FCC catalyst residue was compared
to that of reactive and inert materials of similar chemical compositions.
Further, the influence of temperature on the suspension was studied, and also, a
new method was proposed in which the pozzolan/calcium hydroxide ratio was varied
(with the initial presence of solid Ca(OH)? in the system). It was concluded that
the method is effective, fast and simple for evaluating the high reactivity of
the catalyst. Therefore, this method is an alternative for the evaluation of the
reactivity of pozzolanic materials.