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The NO<sub>x</sub> Storage and Desorption Activity of Mg/Al/Cu-NH<sub>3</sub>·H<sub>2</sub>O Hydrotalcites at Low Temperature
College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
- 1 College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
- 2 College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
- 3 College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
- 4 College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
- 5 College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
- 6 College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai, China
- 7 College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China
Journal of Minerals and Materials Characterization and Engineering·Volume 05 (2017)·Pages 311–322·Published 9 August 2017·DOI10.4236/jmmce.2017.55026
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Abstract
Ammonium containing catalyst Mg/Al/Cu-NH 3 · H 2 O 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-NH 3 · H 2 O 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-NH 3 · H 2 O HT further.
KeywordsHydrotalcitesNO<sub>x</sub>Storage and DesorptionTG and DTG AnalysisFT-IR Characterization
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