Effect of ionic liquid in Ni/ZrO2 catalysts applied to syngas production by methane tri-reforming

Review on the catalytic tri-reforming of methane - Part II: Catalyst development

“…In addition, compared to impregnation materials, the catalysts prepared by hydrothermal method had higher specific surface areas, and showed a better reducibility of NiO species, which contributed to their higher global catalytic efficiency in TRM reaction. Also, as shown in Table 1, Anchieta et al [59] proved that a 5 wt%Ni/ZrO 2 catalyst, prepared by impregnation method, exhibited lower catalytic performance (at the same reaction temperature and with a smaller GHSV) in comparison with 4.8Ni/ZrO HT 2 catalyst, prepared by hydrothermal method [34]. Similarly, NiCe/SiO 2 prepared by reverse microemulsion exhibited higher catalytic performance than the counterpart prepared by impregnation, despite the higher Ni dispersion of the latter (Table 1) [48].…”

“…This outstanding catalyst performance is explained by a high Ni dispersion (18.2 %, with mean Ni particle size of 6.2 nm) and a strong MSI (TPR peaks around 340 and 420 • C) of this catalyst. In another work, the influence of the ionic liquid on the morphology, acido-basicity, and Ni dispersion was investigated on the catalytic performance of Ni/ZrO 2 [59]. The use of an ionic liquid during the catalyst preparation by impregnation reduced the number of strong acid sites of the support, which improved the catalyst efficiency in TRM.…”

“…In addition, zirconia is often selected as catalyst support or promoter thanks to the presence of defects on its crystal surface, where oxygen vacancies are easily created. Moreover, ZrO 2 provides low concentration of Lewis acid sites and a moderate MSI with Ni species [34,59]. ZrO 2 and ZrO 2 -based materials (e.g.…”

Effect of Drying on the Fabrication of MgAl Layered Double Hydroxides

“…The size of the metal nanoparticles affects the preferred reaction mechanism, therefore, in different product selectivities. Anchieta et al 37 studied the net ionic effect on Ni/ZrO 2 catalysts produced for smelting gas production by methane trireforming and observed that the catalysts used multiple NiO reduction with interactions with the support of different ZrO 2 due to different particle sizes. The most common LDH drying method is freeze-drying.…”

The Relationship between Reaction Temperature and Carbon Deposition on Nickel Catalysts Based on Al2O3, ZrO2 or SiO2 Supports during the Biogas Dry Reforming Reaction

“…Although zirconia has a much lower surface area than the aforementioned metal oxides (i.e., γ-Al 2 O 3 and SiO 2 ), it possesses higher strength and thermal stability. Moreover, it is thought to have both acidic and alkaline surface properties and behaves as a bi-functional oxide with redox functions [30,31]. Sokolov et al [32] carried out low temperature (400 • C) dry reforming tests using CH 4 /CO 2 = 1, comparing the performance of Ni catalysts based on a number of different carriers, and showed that after 10 h of time-on-stream, H 2 yield followed the order Ni…”