Kinetics of methanation of carbon dioxide on a nickel catalyst

Ibraeva, Z. A.; Nekrasov, N. V.; Gudkov, B. S.; Yakerson, V. I.; Beisembaeva, Z. T.; Голосман, Е. З.; Kiperman, S. L.

doi:10.1007/bf00531916

Cited by 29 publications

(19 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The published kinetic description [26,27] of CO methanation on Ni/Al 2 O 3 in the unsteady state region assumes that strongly adsorbed species, including CO, participate in the reaction. In a number of publications [12,16,18,19,23], a maximum was detected in the depen dence of the rate of methane formation on Р СО . The absence of this maximum can be explained by an insufficiently wide interval of the variation of the par tial pressures of parent substances.…”

Section: Introductionmentioning

confidence: 97%

“…The rate equations proposed for this reaction on different nickel catalysts can be divided into zero order equations [1][2][3][4][5], power equations [5][6][7][8][9][10][11][12][13][14][15], and Langmuir-Hinshelwood equations [15][16][17][18][19][20][21][22][23][24][25]. In the power equations, the orders of reaction with respect to hydrogen and CO vary in the ranges from 0.5 to 1.8 and from -0.87 to 1.0, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Kinetics of carbon monoxide methanation on nickel catalysts

et al. 2012

Self Cite

View full text Add to dashboard Cite

The kinetics of CO methanation in excess H 2 on CaO and CeO 2 doped nickel catalysts sup ported on Al 2 O 3 and TiO 2 was studied at atmospheric pressure in a temperature range of 180-240°C. It was found that the same rational fractional rate equation corresponding to the reaction taking place at high sur face coverages, is valid for all of the catalysts. The activity of nickel catalysts in the methanation reaction and their adsorption capacity with respect to reaction mixture components depend on the nature of the support and dopants.

show abstract

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Kinetics of carbon monoxide methanation on nickel catalysts

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fujita et al [71], Vlasenko et al [72] and Ibraeva et al [73] studied the mechanism of CO 2 methanation by kinetics in the transient state on a Ni catalyst. They considered that CO does not participate in the CO 2 methanation reaction.…”

Section: Introductionmentioning

confidence: 99%

Insights into the mechanisms of CO2 methanation on Ni(111) surfaces by density functional theory

Ren

Guo

Yang

et al. 2015

Applied Surface Science

173

128

View full text Add to dashboard Cite

a b s t r a c tThe different mechanisms of CO 2 methanation on Ni(111) surfaces have been investigated by density functional theory with and without the formation of CO as an intermediate. The most stable adsorption configurations of all reaction species (O, OH, CO, CH, CH 2 , CH 3 , CH 4 , HCOO, C(OH) 2 , CH 2 O, etc.) in three paths of CO 2 methanation adsorbed on the Ni(111) surface are described. The energy barriers and reaction energies for the overall processes involved in the various paths are presented. The rate-determining steps for the three mechanisms are HCOO→CO + OH for path 1, CO → C + O for path 2 and CO 2 + 2H → C(OH) 2 for path 3 with maximum energy barriers of 306.8 kJ/mol, 237.4 kJ/mol and 292.3 kJ/mol, respectively. Path 2 is therefore the optimum of the three mechanisms. The path starts with CO 2 dissociation into CO and O, CO decomposition into C and O species and C species hydrogenation to form CH 4 : CO 2 → CO + O → C + O + 4H → CH 2 + 2H → CH 3 + H → CH 4 .

show abstract

“…Thus, using a highly efficient catalyst is required to fully exploit the potential of the Sabatier reaction. Most of the research conducted in this field has dealt with the use of Ni-based catalysts [3,4,[7][8][9][10][11], although other transition (e.g., Fe and Co) [9,12] and noble (e.g., Rh, Pt, Ru and Pd) [12][13][14][15][16] metal based systems have also proven active.…”

Section: Introductionmentioning

confidence: 99%

An Alumina-Supported Ni-La-Based Catalyst for Producing Synthetic Natural Gas

et al. 2016

View full text Add to dashboard Cite

LaNi 5 , known for its hydrogen storage capability, was adapted to the form of a metal oxide-supported (γ-Al 2 O 3 ) catalyst and its performance for the Sabatier reaction assessed. The 20 wt % La-Ni/γ-Al 2 O 3 particles were prepared via solution combustion synthesis (SCS) and exhibited good catalytic activity, achieving a CO 2 conversion of 75% with a high CH 4 selectivity (98%) at 1 atm and 300 • C. Characteristics of the La-Ni/γ-Al 2 O 3 catalyst were identified at various stages of the catalytic process (as-prepared, activated, and post-reaction) and in-situ DRIFTS was used to probe the reaction mechanism. The as-prepared catalyst contained amorphous surface La-Ni spinels with particle sizes <6 nm. The reduction process altered the catalyst make-up where, despite the reducing conditions, Ni 2+ -based particles with diameters between 4 and 20 nm decorated with LaO x moieties were produced. However, the post-reaction catalyst had particle sizes of 4-9 nm and comprised metallic Ni, with the LaO x decoration reverting to a form akin to the as-prepared catalyst. DRIFTS analysis indicated that formates and adsorbed CO species were present on the catalyst surface during the reaction, implying the reaction proceeded via a H 2 -assisted and sequential CO 2 dissociation to C and O. These were then rapidly hydrogenated into CH 4 and H 2 O.

show abstract

Kinetics of methanation of carbon dioxide on a nickel catalyst

Cited by 29 publications

References 8 publications

Kinetics of carbon monoxide methanation on nickel catalysts

Kinetics of carbon monoxide methanation on nickel catalysts

Insights into the mechanisms of CO2 methanation on Ni(111) surfaces by density functional theory

An Alumina-Supported Ni-La-Based Catalyst for Producing Synthetic Natural Gas

Contact Info

Product

Resources

About