Low-temperature selective catalytic reduction of NO with CO over Ni-x-MOF-5

摘要

The catalyst with a high NO conversion rate and good sulfur resistance is the key to CO-selective catalytic reduction (CO-SCR). Ni doping MOF-5 was synthesized successfully through a one-pot solvothermal method. X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (Raman), specific surface area analyzer (BET) and X-ray photoelectron spectroscopy (XPS) were used to characterize the structure of the catalyst. The results showed that the doped Ni partly replaced the Zn site in MOF-5 to form a bimetallic organic framework and raised the concentration of adsorbed oxygen in the catalyst. Compared with pure MOF-5, Ni-x-MOF-5 exhibited better catalytic activity. Specifically, the NO conversion rate of Ni-1/12-MOF-5 catalyst increased from 32 to 80 at 160 degrees C and 85 to 94 at 240 degrees C. Even in the sulfur-containing environment, the NO conversion rate could reach 80 at 240 degrees C.