TY - THES

T1 - Influence of coating parameters and calcination temperature on monolithic alumina supported nickel catalysts for methanation

AU - Reiter, Sarah

N1 - embargoed until 01-05-2028

PY - 2023

Y1 - 2023

N2 - For CO2 methanation nickel-based catalysts with honeycomb monoliths are required at the Chair of Process Technology and Industrial Environmental Protection at Montanuniversität Leoben. Prior to this work cordierite-based catalysts are prepared via wash-coating and subsequent wet impregnation with nickel nitrate under laboratory conditions. As low catalyst loadings are obtained for this material, an alternative structure based on aluminum oxide shows potential. Within the framework of this master thesis, a general coating procedure is developed based on an extensive literature review on Ni/Al2O3 catalyst systems. A preparation method consisting of four coating procedures with nickel nitrate and calcination at varying temperatures is introduced. Methanation experiments in different setups show the development from cordierite to alumina monoliths and their performance. For the alumina honeycombs increased nickel loadings are achieved. Consequently, they perform superior during catalytic methanation and a high COx conversion is obtained. The calcination temperature is identified as one of the most influential parameters on the performance and long-term stability of the honeycombs during CO2 methanation. Based on the results obtained within this work an overview on further developments of the coating procedures for alumina monolithic structures is given, to obtain highly loaded and active catalyst systems.

AB - For CO2 methanation nickel-based catalysts with honeycomb monoliths are required at the Chair of Process Technology and Industrial Environmental Protection at Montanuniversität Leoben. Prior to this work cordierite-based catalysts are prepared via wash-coating and subsequent wet impregnation with nickel nitrate under laboratory conditions. As low catalyst loadings are obtained for this material, an alternative structure based on aluminum oxide shows potential. Within the framework of this master thesis, a general coating procedure is developed based on an extensive literature review on Ni/Al2O3 catalyst systems. A preparation method consisting of four coating procedures with nickel nitrate and calcination at varying temperatures is introduced. Methanation experiments in different setups show the development from cordierite to alumina monoliths and their performance. For the alumina honeycombs increased nickel loadings are achieved. Consequently, they perform superior during catalytic methanation and a high COx conversion is obtained. The calcination temperature is identified as one of the most influential parameters on the performance and long-term stability of the honeycombs during CO2 methanation. Based on the results obtained within this work an overview on further developments of the coating procedures for alumina monolithic structures is given, to obtain highly loaded and active catalyst systems.

KW - Methanisierung

KW - SNG

KW - katalytische Methanisierung

KW - Waben

KW - monolithische Katalysatoren

KW - Nickel-Aluminiumoxid Katalysatoren

KW - Kalzinierungstemperatur

KW - Nass-Imprägnierung

KW - Nickel Katalysatoren

KW - Aluminiumoxid-Träger

KW - Versuchsanlage

KW - Beschichtungsverfahren

KW - methanation

KW - SNG

KW - catalytic methanation

KW - honeycombs

KW - monolithic catalysts

KW - nickel-alumina catalyst systems

KW - calcination temperature

KW - wet impregnation

KW - nickel catalyst

KW - alumina support

KW - pilot plant

KW - coating strategies

M3 - Master's Thesis

ER -