Activated coke (AC) has great potential in the field of low-temperature NO removal (DeNO), especially the branch prepared by blending modification. In this study, the AC-based pyrolusite and/or titanium ore blended catalysts were prepared and applied for DeNO. The results show blending pyrolusite and titanium ore promoted the catalytic performance of AC (Px@AC, Tix@AC) clearly, and the co-blending of two of them showed a synergistic effect. The (P/Ti-1/2)15@AC performed the highest NO conversion of 66.4%, improved 16.9% and 16.0% respectively compared with P15@AC and Ti15@AC. For the (P/Ti-1/2)15@AC DeNO, its relative better porous structure (S = 364 m/g, V = 0.156 cm/g) makes better mass transfer and more active sites exposure, stronger surface acidity (C-O, 19.43%; C=O, 4.16%) is more favorable to the NH adsorption, and Ti, Mn and Fe formed bridge structure fasted the lactic oxygen recovery and electron transfer. The DeNO of (P/Ti-1/2)15@AC followed both the E-R and L-H mechanism, both the gaseous and adsorbed NO reacted with the activated NH due to the active sites provided by both the carbon and titanium.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7656451 | PMC |
| http://dx.doi.org/10.1038/s41598-020-76592-3 | DOI Listing |
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