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Studies on the Preparation and Adsorption as Precursor for Nitrogen Oxides of Diatomic Metal Hydrotalcite-like Compounds

GUO Zhi-qiang 1, NI Zhe-ming 1, YU Wei-hua 2, WANG Li-Geng 1, GE Zhong-hua 1 (1.Laboratory of Advanced Catalytic Materials, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; 2.College of Zhijiang, Zhejiang University of Technology, Hangzhou 310024, China)  
Some diatomic metal hydrotalcite-like compounds were synthesized by co-precipitation and characterized by XRD and IR. The adsorption capacity of the sample after calcination at 500℃ for nitrogen oxides was measured. The results showed that the samples had typical layer hydrotalcite structure. The MAl-HTlcs(M=Cu, Mg, Zn, Co, Ni) and ZnM-HTlcs(M=Fe, Cr) were suitable adsorbents for NOx , and the adsorption capacity and rate of ZnAl-HTlc(Zn/Al molar ratio of 3) for NOx were maximal, and the static saturation adsorption capacity was 1851mg/g .
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