4.7 Article

Ce doped V-W/Ti as selective catalytic reduction catalysts for cement kiln flue gas denitration

出版社

SPRINGER HEIDELBERG
DOI: 10.1007/s11356-023-31165-5

关键词

V-WCe/Ti catalysts; SCR reduction; Flue gas dust; H2O and SO2 resistance; Life prediction

向作者/读者索取更多资源

This article presents a pilot study on the removal of NOx from cement kiln flue gas using Ce doped V-W/Ti catalyst in selective catalytic reduction with ammonia (NH3-SCR). The study found that cement kiln dust decreased the denitration efficiency of the catalyst, but the introduction of SO2 and H2O restored and improved the efficiency. Analysis revealed that the Ce and W ratios in the catalyst played a significant role in the denitrification activity. The study also verified and predicted the catalyst's lifespan.
In cement industry, the selection of catalyst temperature window and the inhibition effect of dust composition in flue gas on catalyst are the key issues of flue gas denitrification. In this article, a pilot study with Ce doped V-W/Ti catalyst on the removal of NOx by selective catalytic reduction with ammonia (NH3-SCR) from the cement kiln flue gas was presented. Cement kiln dust loading on catalysts obviously decreased the NO conversion in the absence of SO2 and H2O, while the denitration efficiency restored from 75 to 98% at 280 degree celsius after SO2 and H2O introduced into the reaction system, which mainly because the SO2 may enhance the acidic site on the catalyst surface, and prefer to be bonded with the coordinated Ca species, releasing the active sites poisoned by dust. The NH3-temperature programmed desorption (NH3-TPD), X-ray photoelectron spectroscopy (XPS), and H-2-temperature programmed reduction (H-2-TPR) detections were performed to reveal that the appropriate Ce and W ratios catalyst contributed better denitrification activity. The optimum ratio of Ce doped catalyst was amplified to form the standard honeycomb monomer catalyst, and then, the activity of catalyst was verified on the side line of cement kiln. The effect of temperature and space velocity on denitrification efficiency was investigated, and the denitration efficiency reached to 92.5% at 300degree celsius and 3000 h(-1) space velocity. Moreover, the life of catalyst was verified and predicted by GM (1,1) grey model. The study realized the innovation from the laboratory data rules to the industrial pilot application, providing positive promoting value for the industrial large-scale demonstration application of the catalyst.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据