A. Purwaningsih and A. N. Kristanti and D. Z. Mardho and D. W. Saraswati and N. M. Putri and N. H. Saputri and Hartati (2019) Determination of Bronsted Acid Sites In Porous Aluminosilicate Catalysts Using Volumetric And Potentiometric Titration Method. IOP Conference Series: Earth and Environmental Science, 217.

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Abstract

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.

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