Role of CeO₂-ZrO₂Support for Structural, Textural and Functional Properties of Ni-based Catalysts Active in Dry Reforming of Methane

Abstract

Positive environmental and technological contexts make dry methane reforming (DMR) an extensively studied reaction. During this process two main greenhouse gases CH4 and CO2 can be simultaneously converted into syngas – a mixture of CO and H2. Supported-nickel is one of the most frequently applied DMR catalysts. Their activity depends mainly on Ni concentration, kind of its precursor and a deposition method. As DMR is a demanding high-temperature reaction, it requires not only an active but first a very stable catalyst. Structural, textural and functional properties of such support remain thus of crucial efficiency. Main aim of this work was to elucidate how the synthesis of CeO2-ZrO2 support obtained by supercritical fluid method (i.e. at temperature of 400°C under a pressure of 25 MPa), can influence the properties of Ni-based DMR catalysts. The supports of various compositions (CeO2 content from 100 to 0 %), subsequently calcined at 800°C for 6h in air have been analyzed. Nickel was deposited from nitrate(V) precursor via classical wet impregnation. The final catalysts have been characterized structurally (XRD, RS), texturally (BET, SEM) and functionally (UV/Vis-DR, XPS). Catalytic tests in dry methane reforming reaction have been performed to determine activity and stability of the synthesized samples.

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

“…acidity (Xu et al, 2012a). Dudek et al (2019) evaluated the effect of CeO 2 -ZrO 2 support prepared by supercritical fluid method on the performance of Ni-based catalysts. The NiO x /CeO 2 -ZrO 2 catalyst displayed favorable thermal stability and catalytic performance.…”

Effect of ZrO2/CeO2 mixed oxides on fuel gas production during self-sustaining smouldering combustion of lignocellulosic wastes

“…Zirconia is more chemically inert compared to traditional supports such as SiO 2 and Al 2 O 3 , 26 and their properties can be enhanced with the inclusion of another oxide, typically ceria. 27 The use of zirconia-ceria mixed oxide as a support is a popular mixture that can be used for many thermochemical reactions including WGS, [28][29][30][31][32][33] dry reforming of methane, [34][35][36][37][38][39] steam reforming of methane, [40][41][42] CO 2 methanation, 43 partial oxidation of methane, 44 and thermochemical splitting of CO 2 . 45 Although additives have been added to the feedstock to improve the conditions for smouldering combustion, 46,47 the use of catalysts to selectively target certain reactions has never been studied before in smouldering combustion.…”

“…Zirconia is more chemically inert compared to traditional supports such as SiO 2 and Al 2 O 3 , 26 and their properties can be enhanced with the inclusion of another oxide, typically ceria. 27 The use of zirconia-ceria mixed oxide as a support is a popular mixture that can be used for many thermochemical reactions including WGS, 28–33 dry reforming of methane, 34–39 steam reforming of methane, 40–42 CO 2 methanation, 43 partial oxidation of methane, 44 and thermochemical splitting of CO 2 . 45…”

Synthesis of Pillared Clays for Using Them as Carriers of Catalytic Systems

“…Cost-effective and environmentally friendly catalysts are always in demand for synthesis of valuable organic compounds. The main features of a highly efficient catalytic support are: 1) developed surface area for the location of catalytically active centers [1,2], 2) high thermal stability to prevent sintering and abrasion of the catalyst [3,4] 3) the presence of various functional groups responsible for stabilization and activation of the catalytically active phase [5,6].…”