Tuning the catalytic performance of Co/Mg-La system for ammonia synthesis via the active phase precursor introduction method

Hubert Ronduda , Magdalena Zybert , Wojciech Patkowski , Aleksandra Tarka , Przemysław Jodłowski , Leszek Kępiński , Adam Sarnecki , Dariusz Moszyński , Wioletta Raróg-Pilecka

Abstract

A series of cobalt catalysts supported on mixed magnesium-lanthanum oxide (Co/Mg-La) was synthesized using various methods of introducing the active phase precursor on the support, i.e. deposition-precipitation (DP), deposition-precipitation using urea (DPU) and wet impregnation method (WI). The activity measurements in ammonia synthesis reaction revealed significant differences in the performance of catalysts obtained by these methods. Particularly high activity, several times higher than the activity for other catalysts, was observed for the WI catalyst. The detailed physicochemical characteristics (N2 physisorption, XRPD, TPR, H2-TPD, SEM-EDX, CO2-TPD, FTIR-DRIFT, XPS) enabled the identification of chemical state of the catalysts surface. The factors determining outstanding catalytic performance of WI catalytic system were indicated as low level of hydrogen poisoning and favorable basicity of the surface.

Author Hubert Ronduda (FC / CChT)
Hubert Ronduda,,
- Chair of Chemical Technology
, Magdalena Zybert (FC / CChT)
Magdalena Zybert,,
- Chair of Chemical Technology
, Wojciech Patkowski (FC / CChT)
Wojciech Patkowski,,
- Chair of Chemical Technology
, Aleksandra Tarka (FC / CChT)
Aleksandra Tarka,,
- Chair of Chemical Technology
, Przemysław Jodłowski - [Politechnika Krakowska]
Przemysław Jodłowski,,
-
-
, Leszek Kępiński - [Instytut Niskich Temperatur i Badań Strukturalnych im. Włodzimierza Trzebiatowskiego Polskiej Akademii Nauk]
Leszek Kępiński,,
-
- Instytut Niskich Temperatur i Badań Strukturalnych im. Włodzimierza Trzebiatowskiego Polskiej Akademii Nauk
, Adam Sarnecki - [Faculty of Chemical Technology and Engineering (WTIICH) [Zachodniopomorski Uniwersytet Technologiczny w Szczecinie (ZUT)]]
Adam Sarnecki,,
-
- Wydział Technologii i Inżynierii Chemicznej
, Dariusz Moszyński - Faculty of Chemical Technology and Engineering (WTIICH) [Zachodniopomorski Uniwersytet Technologiczny w Szczecinie (ZUT)]
Dariusz Moszyński,,
-
, Wioletta Raróg-Pilecka (FC / CChT)
Wioletta Raróg-Pilecka,,
- Chair of Chemical Technology
Journal seriesApplied Catalysis A-General, [Applied Catalysis A: General], ISSN 0926-860X, e-ISSN 1873-3875
Issue year2020
Vol598
Pages1-15
Publication size in sheets0.7
Article number117553
Keywords in Englishcobalt catalyst, Mg-La mixed oxide,hydrogen poisoning,basicity,ammonia synthesis
ASJC Classification1503 Catalysis; 1508 Process Chemistry and Technology
DOIDOI:10.1016/j.apcata.2020.117553
URL https://www.sciencedirect.com/science/article/abs/pii/S0926860X20301460
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 22-07-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.306; WoS Impact Factor: 2018 = 4.63 (2) - 2018=4.586 (5)
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