Abstract
Mg-loaded activated carbons were prepared by adding various amounts of Mg (1 to 20 wt%) via ultrasonic-assisted impregnation to investigate the effects on the adsorption and desorption characteristics of ammonia. Mg-loaded activated carbons were characterized by TGA, BET, SEM, EDS mapping, and NH3-TPD analysis. Mg was homogeneously dispersed on the activated carbon and NH3-TPD analysis confirmed improved desorption and thermal stability for the 10 wt% Mg sample, named AC-Mg(10). AC-Mg(10) retained the highest desorption for five cycles and showed average desorption amount of 0.788 mmol NH3/g. During the breakthrough analysis, the AC-Mg(10) showed an initial ammonia adsorption capacity of 0.81 mmol NH3/g and average adsorption capacity of 0.69 mmol NH3/g over 30 adsorption and desorption cycles.
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