CO2 hydrogenation into CH4 on NiHNaUSY zeolites

Micro- and mesoporous supports for CO2 methanation catalysts: A comparison between SBA-15, MCM-41 and USY zeolite

“…The specific activation of nickel, evaluated from TOF determination, and the final dispersion of the metal particles over these materials are also compared. Finally, the effect of Ce incorporation to the Ni-containing mesoporous samples is also studied, in order to confirm the results previously obtained in the literature for zeolite supports 6 .…”

“…Introduction of Ni and Ce leads in all the cases to a decrease of the peaks intensities, which could be due the presence of the metal oxides and/or a partial damage of the ordered hexagonal pore structure specially for the MCM-41 samples in the (100) diffraction peak 13,25 . Concerning the wide angle XRD patterns ( Figure 1B and Figure 2B), the presence of amorphous SiO2 (broad diffraction peak around 22.3º) and NiO ), whereas for the 15%Ni/HNaUSY(2.8) zeolite UV bands for both NiO and Ni 2+ were observed 6 . Furthermore, bands attributed to Ce2O3 (220-265 nm) and CeO2 (280-300 nm) [29][30][31] were found for both SBA-15 and MCM-41 samples, suggesting the presence of both type of oxides on the Ni-Ce samples.…”

“…However, no comparable data was found in the literature for the evaluation of the different micro and mesoporous materials performances in CO2 methanation. As a result, the present work compares Ni catalysts containing the same amount of metal dispersed on two SBA-15 samples synthesized by different methods, a MCM-41 sample and a HNaUSY(2.8) zeolite 6 . The specific activation of nickel, evaluated from TOF determination, and the final dispersion of the metal particles over these materials are also compared.…”

“…So far, few works have been published dealing with the use of micro and mesoporous materials as supports for Ni-based CO2 and CO methanation catalysts [6][7][8][9][10][11][12][13][14][15][16][17] , the mainly used being USY zeolite, SBA-15 and MCM-41. Ni-based USY zeolite catalysts showed interesting performances towards methanation being reported the effect of Ni content, Ce addition, the preparation method conditions and some highlights concerning the reaction mechanism 6,[17][18][19] . In addition, SBA-15 and MCM-41 mesoporous materials were used due to their large pore sizes and interesting textural properties for the dispersion of metal species and the prevention of sintering processes.…”

Methanation of Carbon Dioxide over Ni–Ce–Zr Oxides Prepared by One-Pot Hydrolysis of Metal Nitrates with Ammonium Carbonate

“…Ni and noble metals like Ru, Pd and Rh, are reported to be the effective towards CO 2 methanation [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Ni-based catalysts are preferred as promising catalysts for this reaction due to [21][22][23].…”