Kinetics of NH3Decomposition over Well Dispersed Ru

Abstract

In this study, several noble zeolites (SA-600A)-based catalysts supported with RuCl3.nH2O and LiOH·H2O materials were investigated for H2 production from NH3 decomposition. The synthetic catalysts were simultaneously prepared at different supported materials mixing ratios. The effect of initial mixing of Li and Ru on catalyst performance compared to simultaneous mixing was studied. All catalysts were tested for hydrogen production from NH3 decomposition at atmospheric pressure, temperature range of 200–670 ºC, and gas hourly space velocity (GHSV) of 3000 h−1. It was found that the simultaneous and initial mixing of Li and Ru has the same NH3 decomposition results. The zeolite-based catalyst was enhanced with the Ru supported material mixing ratio increase. Among all the synthetic catalysts the catalyst type of 40 g (SA-600A)/5 g RuCl3.nH2O/3 g LiOH·H2O) showed the highest catalyst activity. The catalyst with a mixing ratio of 40 g (SA-600A)/5 g RuCl3.nH2O/3 g LiOH·H2O) was registered the peak NH3 conversion 99.87% at lower temperature of 490 °C.