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Results of the elemental analysis by XRF for ZSM-5 and ICZ are shown in Table 1. It appears that SiO2, Al2O3 and Fe2O3 are the major components (Chareonpanich et al. 2004) as Si/Al and Si/Fe molar ratios measured were 98.35 and 343.86 for the ZSM-5 zeolite and 154.00 and 3.32 for optimized ICZ, respectively.

Table 1

Average chemical composition of ZSM-5 zeolite and ICZ

 Content (wt%)
 SiO2Al2O3Fe2O3CaOMgOK2ONa2OLOIa
ZSM-5 88.75 0.77 0.35 0.03 0.00 0.01 0.28 9.61 
ICZ 58.26 0.32 34.19 0.03 0.00 0.01 0.12 6.93 
 Content (wt%)
 SiO2Al2O3Fe2O3CaOMgOK2ONa2OLOIa
ZSM-5 88.75 0.77 0.35 0.03 0.00 0.01 0.28 9.61 
ICZ 58.26 0.32 34.19 0.03 0.00 0.01 0.12 6.93 

aLoss on ignition.

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