Mesoporous catalysts for dry reforming of methane: Correlation between structure and deactivation behaviour of Ni-containing catalysts

Coking and deactivation of a mesoporous Ni–CaO–ZrO2 catalyst in dry reforming of methane: A study under different feeding compositions

“…These observations agrees well with the results of our previous investigation of the catalyst where the catalyst's high activity was found to be linked to the highly dispersed Ni nano particles (NPs) that have high structural and chemical stability due to the combined effect of their rigid mesoporous framework and strong metal-support interactions (SMSI) [15,[38][39][40]. Similar results were also reported for some NiAl 2 O 4 spinel-based catalysts [41,42].…”

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

“…On the contrary, for the NiZ system, a strong contribution of the metastable tetragonal phase was already detected in the NiZ 2 h sample after catalytic runs, confirming the kinetic contribution to the interaction process ( Figure 1B In addition to zirconia modifications, reflections due to NiO and Co3O4 spinel structure (typical lines located at 37.3°, 43.3°, 62.9°, 87.0° of 2θ, PDF N° 03-065-6920 [36,37] and at 36.8°, 31.2°, 44.7°, 65.1° and 59.3° of 2θ, PDF N° 01-080-1533 [38][39][40] respectively),were detected for NiZ and CoZ samples after thermal treatment for 5 h.…”

The effect of CH 4 decomposition temperature on the property of deposited carbon over Ni/SiO 2 catalyst

“…As it has been described in other references [18,19], there were generally three general types of carbon: amorphous (polymeric), filamentous (whisker/fibrous/vermicular like), and graphitic carbon. Besides, some researchers [20e22] named also three types of carbon species by C a , C b and C g on the catalyst surface, and the C g was graphite-like carbon species (inert carbon) with poor reactivity, which lead to catalyst deactivation.…”