CO2 reforming of CH4 over Rh-containing catalysts

Role of CeO2 in Rh/α-Al2O3 Catalysts for CO2 Reforming of Methane

“…At higher temperature the reduction peak of ceria seems to overlap with the peak of RhOx-Al 2 O 3 . These results suggest a significant interaction between Rh and the support which would help to reduce RhOx-Al 2 O 3 species and to the CeO 2 near the Rh [12]. Different authors [24][25][26][27] propose that the Rh°dis-sociates H 2 molecules into H atoms, which subsequently spillover onto the surface CeO 2 and promote its reduction but it does not affect the reduction of bulk ceria.…”

“…However, it is important, by the low availability and high cost, to develop active catalysts with very low noble metal content. The Rh catalysts show high activity for CO 2 reforming of methane and increase the resistance to carbon formation by oxidation of carbonaceous species adsorbed during the methane dissociation on the metal [10][11][12]. Another possibility to increase the durability and stability of DRM catalysts is the modification of support and the active phase by means of the addition of alkali and/or rare earth oxides [13][14][15][16].…”

Bimetallic Zeolite Catalyst for CO2 Reforming of Methane

“…Then, the different support does not influence the activity of the reaction but, according to Portugal et al [18], it influences the H 2 /CO ratio and the amount of coke formed on the catalyst containing nickel. This can be related to some geometric effects caused by the microporous structure of the zeolite, which inhibits the formation of coke.…”

“…Among the type of zeolites investigated, the zeolites FAU and MFI have been frequently investigated as support. The comparison of catalytic behaviour in the reforming of methane with CO 2 between the zeolites Y and oxide, such as c-Al 2 O 3 , supported Rh catalyst highlights two different aspect: the H 2 /CO ratio is significantly higher for zeolite catalyst compared with that for amorphous-supported catalysts and, above all, the Rh zeolite catalyst reveals a significant stability with time on stream [18]. Recently, the activity of different zeolites-supported Ni catalysts for methane reforming with carbon dioxide has been studied [19].…”

CO2-reforming of methane over Ni/SiO2 catalyst prepared by homogeneous precipitation in sol–gel-derived silica gel

“…CO 2 -reforming of methane is also attractive from the environmental viewpoint [6][7][8][9][10][11][12][13]. Methane is a major component of natural gas and can be an alternative of petroleum in energy production with low emission of CO 2 .…”