Perovskite catalysts for methane combustion: applications, design, effects for reactivity and partial oxidation

Abstract

Summary This review underlines the importance of the developments in perovskite catalysts for methane combustion from the past up to the present. In this review, after a general and brief introduction to perovskites, the mechanisms of catalytic combustion of methane have been included. Moreover, current studies on perovskites have been summarized including the effects of substitutions, doped perovskites, perovskite preparation methods, and the effect of sulfur presence on perovskite catalysts. Besides, recent studies on perovskite oxides and phenomenon of oxygen (O2) deficiency, porous perovskite oxides, and nanostructured perovskites have been conducted. In addition, partial oxidation of methane (POM) has been reviewed. The loss of active component during the POM reaction can take place in the nickel catalyst, in particular. Since nickel has a lower melting point than noble metals and other active components, such as Co and Fe, in general, to deactivate nickel is easier. Compared with conventional structure, the porous structure with the unique morphology significantly enhances the catalytic activity through a much larger surface area (SA) and greater reactivity of the active sites. Furthermore, the monolithic nanoarrayed perovskite presents very good results in well‐defined faceted catalysts and takes part in porous channel hydrocarbon combustion. This review study is prepared as a guide to cover the profound knowledge of perovskite oxides catalysts, considering the methane combustion reaction mechanisms, and addresses prospective studies in this field for researchers.

Enhanced selectivity of syngas in partial oxidation of methane: A new route for promising Ni‐alumina catalysts derived from Ni/ γ‐AlOOH with modified Ni dispersion

“…13 Several recent studies have reported that catalysts based on perovskites can offer advantages over other catalytic materials. 34 Many perovskites were found to exhibit desirable acid-base properties as well as redox characteristics upon incorporation of oxides of transition metals that have variable valences. 35 Perovskites are also known for the mobility of their lattice oxygen enhancing the catalytic activity and suppressing coke formation in POM.…”

Fibrous spherical Ni‐M/ZSM‐5 (M: Mg, Ca, Ta, Ga) catalysts for methane dry reforming: The interplay between surface acidity‐basicity and coking resistance

“…As we recently reviewed, the nature of the support has a strong influence on the activity, selectivity and stability of supported Ni catalysts in DRM reaction . Support materials such as SiO 2 , KCC‐1, KIT‐6, Al 2 O 3 , CeO 2 , perovskites and zeolites have been investigated in DRM. In general, zeolites are microporous crystalline aluminosilicates.…”

Redox reactivity of titania‐doped YSZ‐promoted iron‐based oxygen carrier over multiple redox cycles for chemical looping reforming of methane and hydrogen production

“…The iron oxide redox pair is suitable for conversion of methane into syngas or hydrogen from the thermodynamic equilibrium and catalytic activity . The development of the oxygen carrier or thermodynamic analysis for the production of syngas or hydrogen from chemical looping have been intensively studied . The use of pure iron oxide as an oxygen carrier suffers from the decrease in the reactivity and the defluidization resulting from the sintering of iron oxide during the repeated redox cycling .…”

“…[12][13][14] The development of the oxygen carrier or thermodynamic analysis for the production of syngas or hydrogen from chemical looping have been intensively studied. [15][16][17][18][19] The use of pure iron oxide as an oxygen carrier suffers from the decrease in the reactivity and the defluidization resulting from the sintering of iron oxide during the repeated redox cycling. 13,20 In this respect, refractory materials such as MgAl 2 O 4 , ZrO 2 , and SiO 2 were used as supports to afford high dispersion of active phase in the materials.…”