Effects of composite oxide supports on catalytic performance of Ni-based catalysts for CO methanation

Zhang, Han; Dong, Yuanyuan; Fang, Weiping; Lian, Yixin

doi:10.1016/s1872-2067(11)60485-3

Cited by 49 publications

(23 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…All the H 2 -TPD profiles of the catalysts showed a low temperature desorption peak (nearby 150°C) and a high temperature desorption peak (nearby 400°C). The low temperature peak was attributed to desorption of hydrogen adsorbed on the metal surface, and the high temperature peak was attributed to desorption of the hydrogen spillover hydrogen adsorbed on the surface of the oxide [28]. The Ni 12 Al catalyst H 2 -TPD profiles have desorption peak (90°C) and a satellite peak (150°C) at low temperature.…”

Section: H 2 -Tpd Characterizationmentioning

confidence: 99%

“…The high temperature reduction peak also shifted to low temperature direction, and the area of reduction peak was reduced when the promoter of Ce, Zr, La was introduced. It was suggested that the introduction of Ce, Zr, La make the NiO easier to be reduced, while inhibiting the strong interaction between NiO and c-Al 2 O 3 [22]. The low temperature reduction peaks of Ni-based catalysts with Ce promoter and CeO 2 were overlapped.…”

Section: H 2 -Tpr Characterizationmentioning

confidence: 99%

“…The two desorption peaks (400 and 460°C) with larger area at high temperature were also showed. This indicated that there was a large number of spillover hydrogen [30]. It was possible that a small amount of MgNiO 2 formation was reduced for high dispersion of nickel with strong ability to activate hydrogen.…”

Section: H 2 -Tpd Characterizationmentioning

confidence: 99%

See 2 more Smart Citations

Perfomances of different additives on NiO/γ-Al2O3 catalyst in CO methanation

Wang

Liu

et al. 2016

Appl Petrochem Res

View full text Add to dashboard Cite

In this work, NiO/c-Al 2 O 3 catalyst with different additives prepared by excessive dipping method, was investigated in CO methanation in an attempt to improve the reaction activity and enhance the anti-coking property. The influences of additives, such as Zr, Co, Ce, Zn and La, on catalysts in performance of CO methanation were studied in a fixed-bed reactor. The catalysts were characterized by XRD, H 2 -TPR, H 2 -TPD and CO-TPD. The results showed that the addition of the additives could promote the dispersion of nickle species on support and decrease the crystallite size of Nickel species. The reduction temperatures of catalysts were all reduced except the one with Mg. The catalytic results showed that additives improved the reaction activity of CO methanation. Especially, the addition of La gave the best catalytic performance of 100 % CO conversion and 99.61 % CH 4 selectivity, respectively. The space-time yield of CH 4 was achieved as high as 2134.5 g kg -1 h -1 .

show abstract

Section: H 2 -Tpd Characterizationmentioning

confidence: 99%

Section: H 2 -Tpr Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Perfomances of different additives on NiO/γ-Al2O3 catalyst in CO methanation

Wang

Liu

et al. 2016

Appl Petrochem Res

View full text Add to dashboard Cite

show abstract

“…This is due to the methanation reaction being an exothermic reaction; lower temperature favors the CO Fig. 1 Flow chart of the experimental apparatus conversion [13]. When the reaction temperature increased, the equilibrium constant of the reaction rate decreased, leading to a lower CO conversion.…”

Section: Reaction Temperaturementioning

confidence: 99%

Effect of reaction variables on CO methanation process over NiO–La2O3–MgO/Al2O3 catalyst for coal to synthetic natural gas

Wang

Gao

et al. 2015

Appl Petrochem Res

View full text Add to dashboard Cite

Reaction variables for methanation process were investigated using self-independently developed NiO-La 2 O 3 -MgO/Al 2 O 3 catalyst in a big lab scale reactor. The effects of reaction parameters, such as temperature, pressure, H 2 /CO flow ratio and space velocity on the activity of methanation catalyst were studied. 100 % CO conversion and 95 % of selectivity of methane can be achieved at 400°C and 3 MPa with the feed ratio of H 2 / CO as 3.25:1 and space velocity of 12,000 h -1 .The optimization reaction parameters were suggested on the basis of this work for the further development and commercialization of methanation catalyst.

show abstract

“…In general, CO methanation activity is significantly higher for Al 2 O 3 supports than for SiO 2 supports . Therefore, Ni supported on Al 2 O 3 catalysts has been explored extensively . However, these Ni NPs supported on Al 2 O 3 catalysts tend to aggregate together to form a random structure at high temperatures, resulting in rapid deactivation of the catalyst .…”

Section: Introductionmentioning

confidence: 99%

Novel hierarchical Ni/MgO catalyst for highly efficient CO methanation in a fluidized bed reactor

Zhu

Peng

et al. 2017

AIChE Journal

View full text Add to dashboard Cite

A facile synthesis of the hierarchical Ni/MgO catalyst is reported, with extremely fine dispersion of Ni nanoparticles (NPs) and high surface oxygen mobility. The hierarchical Ni/MgO catalyst exhibits higher activity for CH4 formation than that prepared by the impregnation method. The enhanced activity and thermal stability of the hierarchical Ni/MgO catalyst is attributed to hierarchical MgO particles with a multilayer structure and high surface oxygen mobility. This induces better metal‐support interactions, high Ni dispersion to prevent Ni NPs sintering, and the high surface oxygen mobility provides a high resistance to carbon deposition. Compared to the impregnated Ni/MgO catalyst, the hierarchical Ni/MgO catalyst exhibits a better fluidization quality and a higher attrition‐resistance in a fluidized‐bed reactor. This approach to improve the catalytic activity by creation of hierarchical Ni/MgO particles is encouraging for the design of novel catalysts for synthetic natural gas production, especially from the perspective of matching catalysts with fluidized‐bed reactors. © 2017 American Institute of Chemical Engineers AIChE J, 63: 2141–2152, 2017

show abstract

Effects of composite oxide supports on catalytic performance of Ni-based catalysts for CO methanation

Cited by 49 publications

References 35 publications

Perfomances of different additives on NiO/γ-Al2O3 catalyst in CO methanation

Perfomances of different additives on NiO/γ-Al2O3 catalyst in CO methanation

Effect of reaction variables on CO methanation process over NiO–La2O3–MgO/Al2O3 catalyst for coal to synthetic natural gas

Novel hierarchical Ni/MgO catalyst for highly efficient CO methanation in a fluidized bed reactor

Contact Info

Product

Resources

About