The Brønsted acid site was determined by using volumetric and Potentiometrie titration method. The result showed that the Brønsted acid sites of synthesized aluminosilicate using volumetric titration method are aluminosilicate-1: 0.5491; aluminosilicate-2: 0.5523; and aluminosilicate-3: 0.5772 mmol/g and using potentiometric titration method are aluminosilicate-1: 4.7087; aluminosilicate-2: 5.5739; and aluminosilicate-3: 8.1059 mmol/g. FTIR-pyridine also showed the same trend line, the Brønsted acid sites concentration increased by the increasing of Si/Al mole ratio. The results of the measurement using FTIR-pyridine showed the Brønsted acid sites concentration of aluminosilicate-1; aluminosilicate-2; and aluminosilicate-3 were 0.0293; 0.330; and 0.0336 mmol/g, respectively. The Brønsted acid sites concentration of aluminosilicate was higher using volumetric titration and potentiometric titration methods than using the FTIR-pyridine method, but the trend line was the same, the higher Si/Al mole ratio, concentration of Brønsted acid sites increased.
|Journal||IOP Conference Series: Earth and Environmental Science|
|Publication status||Published - 9 Jan 2019|
|Event||2nd International Conference on Collaboration Seminar of Chemistry and Industry, CoSCI 2018, in conjunction with 23rd Indonesian Society for Biochemistry and Molecular Biology, ISBMB 2018 - Surabaya, Indonesia|
Duration: 11 Oct 2018 → 12 Oct 2018