Combined poisoning effect of K+ and its counter-ion (Cl- or NO3-) on MnOx/TiO2 catalyst during the low temperature NH3-SCR of NO

被引：38

作者：

Cimino, Stefano ^{[1
]}

Totarella, Giorgio ^{[1
]}

Tortorelli, Miriam ^{[1
]}

Lisi, Luciana ^{[1
]}

机构：

[1] Ist Ric Combust IRC CNR, Ple V Tecchio,80, I-80125 Naples, Italy

来源：

CHEMICAL ENGINEERING JOURNAL | 2017年 / 330卷

关键词：

Alkali poisoning; SCR; Marine diesel; TPD; NH3; MnOx; MANGANESE OXIDE CATALYSTS; MN/TIO2; CATALYST; SCR CATALYSTS; DOPED MN/TIO2; SUPPORTED MANGANESE; ALKALI-METALS; SO2; TOLERANCE; UREA-SCR; NH3; REDUCTION;

D O I：

10.1016/j.cej.2017.07.127

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Heterogeneous catalysts for the low temperature NH3-SCR of NOx can be strongly deactivated due to the accumulation of specific compounds deriving from an upstream desulphurization unit, such as a Sea Water Scrubber. In this work, we set out to investigate the specific role of K+ and of its counter-ion (Cl- or NO3-) on the combined poisoning effect induced on the catalytic features of a MnOx/TiO2 system. Poisoning of the catalyst was performed ex situ by impregnation with two target loadings of each K salt, followed by a mild thermal treatment at 250 degrees C, corresponding to the maximum operating temperature of the SCR system. Fresh and poisoned catalysts were characterized by means of ICP-MS, BET, H-2-TPR, NH3-Adsorption, NH3-Temperature Programmed Desorption-Reaction and in situ DRIFT and the impact of poisoning was assessed and compared for the NH3-SCR of NO as well as for the NH3-SCO (Selective Catalytic Oxidation) reaction.

引用

页码：92 / 101

页数：10

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