催化剂是选择性脱硝反应器的核心，对于脱硝装置的性能发挥起着关键作用。目前国内的燃煤机组烟气中灰分含量高且含量不稳定，易造成催化剂堵塞；烟气中砷、碱金属等有害物质含量高，使催化剂中毒丧失活性。平板式催化剂采用特殊的结构（开孔率较大）和加工工艺（使用具有弹性的不锈钢筛网板作为载体，以及添加助剂MoO3），可以很好地解决以上问题。以催化剂性能稳定性为标准，从运行中催化剂发生堵塞、覆盖、磨损和中毒等方面阐述了平板式催化剂应用于燃煤机组的优势。

As a core of selective catalytic reduction (SCR) De-NOx device, catalysts play a key role in the operation of De-NOx device. The catalysts are easily blocked because of the high and unstable ash in flue gas in domestic coal-fired units. The harmful substance in flue gas, such as arsenic, alkaline, etc., could lead to the deactivation of catalysts due to the chemical poisoning. These problems could be well solved when plate-type catalysts were used due to their special structure (big opening ratio) and processing technology (using flexible stainless steel meshes as carrier and MoO3 as promoter). With catalyst performance stability as the standard, the advantages of plate-type catalysts in coal-fired units from the aspects of blocking, coverage, abrasion, and chemical poisoning are discussed in this paper.