High temperature ammonia treatment of activated carbon for enhancement of CO2 adsorption

Abstract The influence of treatment with ammonia on adsorption properties toward CO 2 was examined for commercially available CWZ-35 activated carbon. The treatment was performed for 2 h at elevated temperatures ranging from 200 to 1000 °C. The surface groups were determined by Fourier transform infrared (FTIR) spectroscopy of solid. Additionally FTIR measurement was done for outlet gases evolved during temperature-programmed desorption from the ammonia-treated activated carbon. FTIR spectra of solid samples confirmed the presence of N-containing groups in ammonia-treated carbon. Adsorption properties against CO 2 were checked for both pristine and ammonia-treated activated carbons using thermogravimetric analysis. Activated carbon treated with ammonia demonstrated distinct enhancement in adsorption of CO 2 .

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