Analysis and recompilation of kinetic data about the hydrogen production by the catalytic decomposition of hydrous hydrazine

Abstract

The kinetics of the catalytic decomposition of hydrous hydrazine was determined for the experimental data published in 23 articles. The acquired database contains 139 data sets having 2038 data points. The collected data were analyzed by the integral method, which revealed that hydrazine decomposition follows power-law kinetics. The calculated values of apparent activation energies ranges between 22 and 64 kJ/mol - average value 50.3 kJ/mol, while the reaction orders concerning hydrazine concentration range between 0 and 0.64 - average value 0.33. Analysis showed that the catalyst support significantly impacts the reaction mechanism and activation energy. On average, the catalyst durability was tested by 7.1 cycles, and catalysts retained 69% of their initial activity. The average value of turnover number (TON) is 142, while the estimated value of TON for automotive applications ranges from 105–106, far above the value evaluated on the basis of the reported durability tests.