Combined poisoning effect of K+ and its counter-ion (Cl− or NO3−) on MnOx/TiO2 catalyst during the low temperature NH3-SCR of NO
| Autor: | Stefano Cimino, Giorgio Totarella, Luciana Lisi, Miriam Tortorelli |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
In situ MnO x General Chemical Engineering Inorganic chemistry Scrubber Salt (chemistry) 02 engineering and technology Thermal treatment 010402 general chemistry 01 natural sciences Industrial and Manufacturing Engineering Catalysis Adsorption Operating temperature parasitic diseases Environmental Chemistry Marine diesel NH 3 chemistry.chemical_classification Chemistry Alkali poisoning General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences TPD Counterion 0210 nano-technology SCR |
| Zdroj: | Chemical engineering journal ( Print) 330 (2017): 92–101. doi:10.1016/j.cej.2017.07.127 info:cnr-pdr/source/autori:Cimino, Stefano; Totarella, Giorgio; Tortorelli, Miriam; Lisi, Luciana/titolo:Combined poisoning effect of K+ and its counter-ion (Cl-or NO3-) on MnOx%2FTiO2 catalyst during the low temperature NH3-SCR of NO/doi:10.1016%2Fj.cej.2017.07.127/rivista:Chemical engineering journal ( Print)/anno:2017/pagina_da:92/pagina_a:101/intervallo_pagine:92–101/volume:330 |
| ISSN: | 1385-8947 |
| Popis: | Heterogeneous catalysts for the low temperature NH 3 -SCR of NO x 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 NO 3 − ) on the combined poisoning effect induced on the catalytic features of a MnO x /TiO 2 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 °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, NH 3 -Adsorption, NH 3 -Temperature Programmed Desorption-Reaction and in situ DRIFT and the impact of poisoning was assessed and compared for the NH 3 -SCR of NO as well as for the NH 3 -SCO (Selective Catalytic Oxidation) reaction. |
| Databáze: | OpenAIRE |
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