Silver oxide (AgO) deNOx catalyst in the stationary flue gas: FTIR and TPR characterization / Che Wan Riduan Asmadi Che Wan Embong.

The purposes of this study are to prepare the deNOx catalyst (AgO/Al2O3-SiO2) and to characterize the deNOx catalyst using temperature programmed reduction (TPR) and Fourier transform infrared spectroscopy (FTIR). The optimum reduction temperature and the functional group of deNOx catalyst is identified. Besides that, the applying of low cost catalyst for this study which is silver oxide (AgO) can replace the present catalyst metal such as Platinum Group Metal (PGM) which is very expensive. The problem of NOx emission from the stationary sources such as transportation, fuel combustion and industrial process is the main focus to develop the deNOx catalyst. The methodology used to prepare catalyst includes ball-milled and pre- calcinations process and mechanical mixing catalyst. For calcinations process, five calcinations temperature involved which is 400°C, 500°C, 600°C, 700°C and 800°C respectively. Result for the TPR characterization show that the maximum reduction temperature occurs in the temperature range of 270-690° where the most gas hydrogen was absorbed. The total amounts of gas absorbed during this temperature range are 308.63 umol/g. While for the FTIR the functional group that appear in the prepared deNOx catalyst appear is Si-O bond because the ratio of wt% of the silica is higher than AgO and alumina.