Autothermal reforming of methane over Ni catalysts supported over ZrO2-CeO2-Al2O3

Catalytic Hydrogen Production from Methane Partial Oxidation: Mechanism and Kinetic Study

“…For example, a 10 % Ni/CeO 2 catalyst was prepared by coprecipitation, which significantly improved the interaction between the CPOM catalyst components and, hence, improved the catalytic performance with T 50% at 525 °C, compared with 630 °C for the catalyst prepared by impregnation ( GHSV of 10 400 mLg −1 h −1 ) . Cai et al applied the coprecipitation method to prepare a Ni‐based catalyst on different supports (Al 2 O 3 , ZrO 2 ‐Al 2 O 3 , CeO 2 ‐Al 2 O 3 , and CeO 2 ‐ZrO 2 ‐Al 2 O 3 ) and used these for the methane autothermal reforming reaction. They found that the Ni/CeO 2 ‐ZrO 2 ‐Al 2 O 3 catalyst showed good dispersion of NiO allowing improved oxygen transfer, but it also decreased the formation of nickel aluminate which has no catalytic activity during combustion reactions.…”

“…Therefore, they are not preferred to be used as a single support. Consequently, to overcome this, in many studies alumina was added as dual support along with the oxygen storage due to the high surface area and low cost , . For instance, a substantial increase in the catalytic activity was found for the Ni/CeO 2 ‐ZrO 2 ‐Al 2 O 3 catalyst with an S BET of 165.3 m 2 g −1 , compared to that without Al 2 O 3 which had an S BET of 25.8 m 2 g −1 with T 90% at a temperature of 720 and > 800 °C, respectively ( GHSV of 200 000 mL g −1 h −1 ) .…”

“…Cai et al examined Ni loaded on Al 2 O 3 , ZrO 2 ‐Al 2 O 3 , CeO 2 ‐Al 2 O 3 , and CeO 2 ‐ZrO 2 ‐Al 2 O 3 for methane autothermal reforming. The catalyst supports were prepared by coprecipitation while the 10 wt % Ni was loaded using the wet impregnation method.…”

Monolith and foam catalysts performances in ATR of liquid and gaseous fuels

“…Since the ATR process may be considered as the synthesis of SR and POX [22], the catalyst must ensure simultaneously a high selectivity towards these two reactions, inhibiting other unwanted, such as hydrocarbon cracking. Several studies have demonstrated that nickel [23][24][25] as well as noble metals (Pt, Rh, Ru) [26][27][28] supported on Al 2 O 3 , CeO 2 or ZrO 2 show good activity toward reforming reactions [29][30][31][32][33]; improvements in stability and selectivity are achieved from bimetallic catalytic systems [34]. Great attention must be also devoted to the catalyst structure (e.g.…”

Mechanistic Study of Ni/CeO2‐catalyzed CO2/CH4 Reaction Using Flow and Static Methods

“…Due to its non‐stoichiometric structure and redox properties, ceria has frequently been used as a promoter additive and support for oxidation reactions. It has been suggested that the ceria in ceria‐based metal catalysts can improve the dispersion of metal particles, promote their reduction, and stabilize their reduced state . Some investigators have reported that ceria‐based nickel catalysts are highly active and stable for the CO 2 reforming of methane .…”