Influence of water vapor and acid gases on CO2adsorption using N,N-dimethylethylenediamine decorated Cu-BTC

N,N-Dimethylethylenediamine (mmen) was incorporated as a ligand on the Cu2+of Cu-BTC by a protophilic solvent-assisted solvothermal method for improved performance. X-ray diffraction, scanning electron microscopy and low temperature N2adsorption were used to investigate the structural stability of the synthesized material under the influence of flue gas components, such as water vapor, NO and SO2. The thermal stability was determined through thermal gravimetric (TG) analysis. The influence of the main flue gas components on the CO2adsorption capacity of the material were discussed as well. Finally the SO2/NO resistance mechanism were deduced. Both Cu-BTC-raw and Cu-BTC-mmen were very stable in the presence of H2O, while the former could be destroyed by the continuous NO/N2and SO2/N2mixture flow significantly. This situation has been improved on Cu-BTC-mmen sample, probably because the mmen on the surface of Cu-BTC react with SO2/NO preferentially and protect the Cu2+sites to some extent. Cyclic regeneration test of the CO2adsorption process on fresh and disposed adsorbents was also investigated.