Structural studies on NiO-CeO2-ZrO2 catalysts for steam reforming of ethanol

Nanocomposite Catalysts for Steam Reforming of Methane and Biofuels: Design and Performance

“…Moreover, specific activity of Ni supported on alumina is reported to be even higher than that of low-loaded Ru (Fatsikostas et al, 2002;Haryanto et al, 2005;Sanchez-Sanchez et al, 2007). This agrees with the results of Srinivas et al (Srinivas et al, 2003) demonstrating a high and stable activity in ESR of composites comprised of 40wt. % NiO and 60 wt.% CeO 2 (CeO 2 -ZrO 2 ) prepared via hydrothermal route.…”

“…11), so it can be similarly explained by decoration of the surface of NiO particles with irreducible Y(Zr)O x oxidic species. Indeed, TPR peaks with T max situated even at higher (450-600ºC) temperatures were observed in the case of NiO supported on zirconia, ceria-zirconia or alumina (Montoya et al, 2000;Srinivas et al, 2003;Matsumura & Nakamori, 2004). By analogy with these data, the high-temperature tail of hydrogen consumption can be assigned to reduction of Ni cations incorporated into the bulk of doped zirconia particles (vide supra).…”

Thermochemical Heat Recovery Based on External Heat Engine

“…Numerous publications are available with regard to development of catalysts of steam conversion of methanol [14][15][16][17] and ethanol [18][19][20][21][22][23][24][25][26][27][28], esters [29] for production of SG. The most detailed studies of steam conversion of methanol were performed with coppercontaining compounds, including metallic copper and its oxide, as well as other types of catalysts, the main component of which is copper in combination of oxides of other metals, such as Cu-Zn, Cu-Mn, Cu-Al, CuCr and others.…”

“…Steam conversion of ethanol was studied on applied cobalt [17][18][19], rhodium [18, [20][21][22][23][24][25], nickel [19,[23][24][25], nickel-copper [26][27][28] and palladium [20][21][22] catalysts. It was determined that in steam conversion of ethanol catalysts usually provide complete conversion at flow rates of GHSV = 5000-100000 h -1 , 500-700°Ñ and H 2 O/C 2 H 5 OH ratio from 2 to 14.…”

Catalytic Hydrogen Production from Bioethanol

“…The addition of alkali metals (e.g., Na, K) to Ni/MgO has been observed to depress the deactivation occurrence by preventing Ni sintering [51]. It is worth noting that the recent interests on Ni catalysts seem to be transferred to CeO 2 and ZrO 2 supported samples, which could be ascribed to its well-known oxygen mobility, oxygen storage capability (OSC), and thermal stability [52][53][54][55], in turn improving cokeresistance. In addition, the synergetic effects become notable leading to better catalytic performance (activity, selectivity, and stability) when the second component (Cu) is incorporated into the Ni catalysts indicated by the work performed by Fierro et al, Marino et al, and Velu et al [56][57][58].…”