关键词:

SnSO₄, 热分解, 动力学, 热分析

Abstract:

SnSO₄ is an important promoter of catalyst for preparing naphthalene quinone with oxidation of naphthalene by air.Its thermal decomposition kinetics in N₂ was studied with NETZSCH-STA409PC thermal analyzer.SnSO₄ thermal decomposition was an endothermic reaction and mainly occurred at 450-550℃.The total mass loss was 29.36%，so the reaction products were SnO₂ and SO₂.Kinetic function was obtained and kinetic parameters were calculated with linear regression provided by NETZSCH Instruments Co.Ltd.The correlation coefficient was 0.9997.The results showed that SnSO₄ decomposition was a self-catalysis reaction and the catalyst was its reaction product.The kinetic function predicted that SnSO₄ decomposition was 20% at 450℃ for 120 min and 100% at 480℃ for 106 min，and the process of catalyst preparation can be optimized.

Key words:

SnSO₄, 热分解, 动力学, 热分析