Author(s)

Chunyana Liu¹, Weijun Liu^1*, Liwen Wang¹, Yuyingnan Liu¹, Chuan Yang¹, Fengbai Zhang¹, Shuhua Zhang^2*

¹College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China.
²College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China.

Ammonium containing catalyst Mg/Al/Cu-NH₃·H₂O hydrotalcite (HT) is prepared via co-precipitation, which is effective for NO_x storage under 160℃. XRD and FT-IR are employed to characterize its structure and show that ammonium is successfully incorporated into HT. Meanwhile, the HT still retains the typical structure of hydrotalcite-like compounds. NO_x storage activity tests indicate Mg/Al/Cu-NH₃·H₂O HT shows the significant NO_x removal activity at 156℃ with a little Oxygen existence. TGA and DTG reveal the reaction of the released ammonium with NO_x and storage NO_x as nitrates will be responsible for the high NO_x storage activity. Additionally, the temperature programmed desorption test of NO_x adsorbed sample under 175℃ proves NO_x is stored successfully into Mg/Al/Cu-NH₃·H₂O HT further.

Hydrotalcites, NO_x Storage and Desorption, TG and DTG Analysis, FT-IR Characterization

Liu, C. , Liu, W. , Wang, L. , Liu, Y. , Yang, C. , Zhang, F. and Zhang, S. (2017) The NO_x Storage and Desorption Activity of Mg/Al/Cu-NH₃·H₂O Hydrotalcites at Low Temperature. Journal of Minerals and Materials Characterization and Engineering, 5, 311-322. doi: 10.4236/jmmce.2017.55026.