Uares) and Ir/CZ (circles) catalysts. Ir/-Al2O3 (triangles), Ir/ACZ (squares) and Ir/CZ (circles) catalysts.As can be observed in the inset of Figure five, the H2 /CO molar ratio in the catalysts was in all cases under Differential Circumstances time-on-stream. 3.two.two. DRM Performanceless than 1.0 and stable versus(Intrinsic Activity)At first glance, this shows that the rWGS reaction (R.4) also occurs beneath these situations, resulting inside a reduce Results of intrinsic activity measurements acquired with Ir/Al2O3, Ir/ACZ and Ir/CZ in the H2 /CO molar ratio to values reduced than a single corresponding towards the stoichiometry catalysts under differential reactor operation, i.e., at low CH4 and CO2 conversions (ca. 5of the DRM reaction (R.1) [23]. However, H2 /CO molar ratio decreases in the order Ir/15 ) so that you can eliminate mass and/or thermal transport constrains, are shown inside the Al2 O3 Ir/ACZ Ir/CZ according to the supporting material used. This reflects the Arrhenius plots of Figure 6. Related to benefits presented in Figure 4, methane and carbon increasing discrepancy between CO2 and CH consumption prices, the former varying dioxide consumption rates are normalized per mass of your 4active phase (Ir) contained in within the opposite sense towards the H2 /CO molar ratios. The systematic increase inside the relathe catalyst Ziritaxestat Biological Activity loaded in the reactor, i.e., as moles of consumed reactant per mass of Ir per tive CO2 conversion with increasing the OSC of your support (OSCAl2O3 = 0 olO2 /g second, as a way to take into account the different metal loading of the 1 wt Ir/Al2O3, 0.four OSCACZ = 110 olO2 /g OSCCZ = 557 olO2 /g), plus the concomitant improve in wt Ir/ACZ and 0.six wt Ir/CZ catalysts. Thus, variations in the catalytic prices mainly CO formation relative to H2, indicates the occurrence of support-induced modifications reflect doable metal-support interactions [82] originating from the big variation in oxof the Ir surface chemistry. This issue is discussed below in connection together with the intrinsic ygen storage capacity and lability in between the three supports applied (Table 1). It really is apparent activity information. from Figure 6a that, when all 3 catalysts exhibit virtually the same methane consumption rates, the CO2Performance below Differential Circumstances (Intrinsicthe Inositol nicotinate Protocol nature of three.2.two. DRM consumption rates differ appreciably based on Activity) the assistance. In unique, iridium supported on CZ and ACZ exhibits a Ir/Al O , Ir/ACZ and Ir/CZ Results of intrinsic activity measurements acquired with substantially greater in2 3 trinsic activity in comparison to Ir/-Al2O3, with Ir/CZ being general at low CH andespecially catalysts under differential reactor operation, i.e., by far the most active, CO2 conversions (ca. 4 at reduced temperatures.order to get rid of mass and/or thermal transport constrains, are ashown inside the 55 ) in Additionally, the CO2 consumption apparent activation energies (E ) are reduce for the CZ-containingFigure 6. Similar decreasing from 91.3in Figure four, methane and carbon Arrhenius plots of catalysts with Ea to outcomes presented kJ/mol on Ir/-Al2O3 dioxide consumption prices are normalized per mass on the active phase (Ir) contained within the catalyst loaded in the reactor, i.e., as moles of consumed reactant per mass of Ir per second, in an effort to take into account the distinct metal loading from the 1 wt Ir/Al2 O3 , 0.four wt Ir/ACZ and 0.six wt Ir/CZ catalysts. As a result, variations within the catalytic rates mostly reflect achievable metal-support interactions [82] originating.
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