Cu-BTC metal-organic framework as a novel catalyst for low temperature selective catalytic reduction (SCR) of NO by NH₃: Promotional effect of activation temperature

abstract

Metal-organic framework Cu-BTC was synthesized by hydrothermal method, and was employed as denitrification catalyst for low temperature selective catalytic reduction of NO with NH₃ (NH₃-SCR). After activated at different temperatures from 180°C to 250°C in vacuum, Cu-BTC samples were characterized by NH₃-SCR test, X-ray powder diffraction, thermal analysis, scanning electron microscope and in situ Fourier-transform infrared. NO conversion results revealed that activation temperatures played a significant beneficial effect role in Cu-BTC catalytic performance for low-temperature NH₃-SCR reaction. The Cu-BTC catalyst pre-treated at 230°C achieved a complete NO conversion efficiency with large operating-temperature window from 220°C to 280°C. This excellent catalytic activity was mainly attributed to the unsaturated Cu sites in Cu-BTC. The correlation between catalytic property and structure of Cu-BTC was discussed.

keywords:

• MOFs
• Cu-BTC
• low-temperature NH₃-SCR and catalysis

Funding

This work is supported by the National Basic Research Program of China (No. 2011CB936002), National Natural Science Foundation of China (No. 51178076) and the Fundamental Research Funds for the Central Universities (No. DUT14LK17).