Open AccessSynthesis of a Geopolymer Binders Using Spent Fluid Catalytic Cracking (FCC) Catalyst
Author(s) -
Gaby Ruiz,
Rafael Aguilar,
Javier Nakamatsu,
S. Kim
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/660/1/012009
Subject(s) - geopolymer , compressive strength , materials science , fluid catalytic cracking , catalysis , aluminium , curing (chemistry) , chemical engineering , cracking , composite material , organic chemistry , chemistry , engineering
A synthesis of a geopolymer binder using spent fluid catalytic cracking (FCC) catalyst is evaluated in this research. Spent FCC catalyst is a solid waste product from the oil refining industry worldwide. It is composed mainly by aluminium and silicon oxides. The silica modulus (Ms), NaOH molar concentration, and liquid/solid (AS/FCC) weight ratio were studied as key factors of the mixture composition for the evaluation of the compressive strength and bulk density of geopolymers. Additional total ratios of SiO 2 /Al 2 O 3 , Na 2 O/SiO 2 , and H 2 O/total solids, which consider chemical composition of the final mixture, were studied. Results indicate that there is an optimum value for each Ms, NaOH molar concentration and AS/FCC that produces the maximum compressive strength. These values also match with the optimized total ratios of SiO 2 /Al 2 O 3 , N 2 O/SiO 2 and H 2 O/total solids in the mixture, which can be considered as alternative control parameters for the formulation process. The bulk density is more related to AS/FCC value. A geopolymer binder with a compressive strength of 24.7 MPa after curing for one day at 65°C and six days at room temperature was produced using this spent FCC waste.