STUDY ON REMOVAL OF CHLORIDE BY MAGNESIUM ALUMINUM SILICATE

Abstract

Abstract: Porous silicate materials possess excellent adsorption characteristics. Three kinds of adsorbents of magnesium silicate，aluminum silicate and magnesium silicate were synthesized by high temperature hydrothermal method at different treating time and characterized by BET, XRD and SEM techniques, and the chloride removal efficiencies from simulated oil were tested. The magnesium aluminum silicate was selected as the best adsorbent. The experimental results showed that the best adsorbents is obtained by reacting at 120 ℃ for 18 h. When the ratio of magnesium to aluminum was 3∶2， the adsorption time 12 h，the ratio of adsorbent to oil 1∶20 and the adsorption temperature 30 ℃，and the initial concentration of model oil 60 mg/L，the adsorption dechlorination rate reached 65.17%. This indicates that when the magnesium and aluminum oxides in the system co-exist and reach a certain proportion, the adsorbent particles accumulate more uniformly, the specific surface area and the pore volume increase obviously, and the adsorption capacity of the adsorbent increases effectively.

Key words: model oil, dechlorination, adsorbent, magnesium aluminum silicate

CLC Number:

References

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