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Outline
Copper-based layered double hydroxides (Cu-LDHs) are layered compounds composed of positively charged lamels and interlayer negative anions. With their excellent ion exchange properties, adjustable interlayer structure, unique memory effect, excellent catalytic activity and good thermal stability, they show great application potential in the field of denitrification. In this paper, the application progress of Cu-LDHs derivative catalysts in denitrification technology was reviewed. The types of SCR catalysts for Cu-LDHs derivatives were systematically classified from the perspectives of metal doping, carrier loading and anion regulation. The reaction mechanism of NH3, CO and C3H6 as reducing agents in SCR system of Cu-LDHs derivatives was investigated. In addition, the strengthening strategy of the Cu-LDHs derivative catalyst in the aspects of sulfur resistance, hydrothermal aging resistance and alkali metal poisoning resistance was described in detail, aiming to enhance the stability and durability of the catalyst by comprehensive means. Finally, the future research direction of Cu-LDHs derivatives is prospectively prospected.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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