Citation: Chuanmin Chen, Yue Cao, Songtao Liu, Jianmeng Chen, Wenbo Jia. Review on the latest developments in modified vanadium-titanium-based SCR catalysts[J]. Chinese Journal of Catalysis, ;2018, 39(8): 1347-1365. doi: 10.1016/S1872-2067(18)63090-6 shu

Review on the latest developments in modified vanadium-titanium-based SCR catalysts

School of Environmental Science & Engineering, North China Electric Power University, Baoding 071003, Hebei, China

Received Date: 5 March 2018
Revised Date: 3 April 2018

Fund Project: This work was supported by the Science and Technology Plan Project of Hebei Province of China (16273703D) and the Fundamental Research Funds for the Central Universities (2015ZD24, 2017XS123).

Vanadium-titanium-based catalysts are the most widely used industrial materials for NO_xremoval from coal-fired power plants. Owing to their relatively poor low-temperature deNO_x activity, low thermal stability, insufficient Hg⁰ oxidation activity, SO₂ oxidation, ammonia slip, and other disadvantages, modifications to traditional vanadium-titanium-based selective catalytic reduction (SCR) catalysts have been attempted by many researchers to promote their relevant performance. This article reviewed the research progress of modified vanadium-titanium-based SCR catalysts from seven aspects, namely, (1) improving low-temperature deNO_x efficiency, (2) enhancing thermal stability, (3) improving Hg⁰ oxidation efficiency, (4) oxidizing slip ammonia, (5) reducing SO₂ oxidation, (6) increasing alkali resistance, and (7) others. Their catalytic performance and the influence mechanisms have been discussed in detail. These catalysts were also divided into different categories according to their modified components such as noble metals (e.g., silver, ruthenium), transition metals (e.g., manganese, iron, copper, zirconium, etc.), rare earth metals (e.g., cerium, praseodymium), and other metal chlorides (e.g., calcium chloride, copper chloride) and non-metals (fluorine, sulfur, silicon, nitrogen, etc.). The advantages and disadvantages of these catalysts were summarized. Based on previous studies and the author's point of view, doping the appropriate modified components is beneficial to further improve the overall performance of vanadium-titanium-based SCR catalysts. This has enormous development potential and is a promising way to realize the control of multiple pollutants on the basis of the existing flue gas treatment system.
- Vanadium-titanium-based catalyst,
- Selective catalytic reduction,
- Low-temperature denitration,
- Hg⁰ oxidation,
- Slip ammonia,
- SO₂ oxidation
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