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| Characterization Of Silica-Alumina Synthesized From Glass Waste By Double Templates Cetyltrimethylammonium Bromide (Ctab) And Trimethylammonium Chloride (Tmacl) |
Sriatun, Niko Ardiwibowo
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Abstract:
Synthesis of silica-alumina was done to overcome the limitations of pore diameter of natural zeolite as a catalyst. Due to the effectiveness of catalysis was constrained by the pore size, therefore, some efforts are needed to increase the pore size by using a double template, namely cetyltrimethylammonium bromide (CTAB), which was as a templating agent and trimethylammonium chloride (TMACl) as co-surfactant. Silica was extracted from the glass by Na2CO3 to form sodium silicate. Sodium aluminate was obtained from the reaction of Al(OH)3 with NaOH. The synthesis of silica-alumina SiO2/Al2O3 ratio 7:1, 7:2, and 7:3 with surfactant concentration of 0.6 M CTAB and 0.3 M TMACl. The hydrothermal processes at 100 0C for 72 hours. The mixture was filtered and washed until neutral pH, then they calcined at 550 0C for 5,5 hours. The results of all samples had a functional group (1080.14 cm-1). The nature of crystallinity by XRD showed that the ratio of SiO2/Al2O3 7:1 with 0.6 M CTAB had a good crystallinity with the types of nepheline, syn minerals. Characterization of surface properties with a BET surface area analyzer showed that the ratio of SiO2/Al2O3 7:1 with 0.6 M CTAB had the largest pore size of 14.487 Å.
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