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Doped Ni Catalysts for Methane Reforming with CO2

“…Another possible effect of Pb in the doped Ni catalysts is its ensemble size control on the surface nickel species. catalysts showed that the main reduction peak of surface Ni oxides (at 620°C) shifted to the low temperature side continuously with the added amount of Pb and also the small shoulder peak at 480°C, which could be assigned as the reduction of higher dispersed Ni species [9][10][11]17,26] work [26]. These results inferred that Pb might retard the sintering of Ni during the reforming process.…”

“…The 4-h used Pb 0:01 Ni/a-Al 2 O 3 catalyst was characterized with field emission scanning electron microscopy (FE-SEM) (Hitachi S-4000, Japan) and field emission transmission electron microscopy (FE-TEM) (Hitachi HF-2000, Japan). And the operation procedures of these characterizations were described in detail in previous papers [9][10][11]17,26]. Figure 1 presents the influence of Pb on the activity of Ni/SiO 2 for methane reforming with CO 2 .…”

“…Supported Ni catalyst is popularly reported for its higher activity and low price [3][4][5][6][7][8][9][10][11][12][13][14], while coke deposition, which will block the reactor and make the catalyst deactivated is the main problem. A lot of methods and promoters have been reported in order to decrease coke deposition on nickel.…”

“…Alkaline and alkaline earth metals were used as promoters to nickel catalyst in order to increase the gasification of surface carbon via increasing the adsorption and decomposition of CO 2 by several groups [13][14][15][16][17]. Rare earth metals such as lanthanum and cerium were employed as support and/or promoters of Ni in order to depress the coke deposition [11,13,18,19]. Co, Cu, Zr, Mn, Mo, Ti, Ag and Sn were also used as promoters of supported Ni catalyst to increase its coke resistance ability [20].…”

Preparation of Ni‐Based Metal Monolithic Catalysts and a Study of Their Performance in Methane Reforming with CO2

“…[16] Recently, it was reported that the structures of the support exert an important influence on the catalytic activity of Ni in methane reforming with CO 2 . [17,18] Wei et al [19] reported that Ni supported on nanosized ZrO 2 (15-25 nm), MgO (10-20 nm), or g-Al 2 O 3 (5-19 nm) were highly active and stable. Hwang et al [15] reported that mesoporous clay-supported Ni catalysts exhibited high activity and a long lifetime of stability.…”