Rational design of Mg–Al mixed oxide-supported bimetallic catalysts for dry reforming of methane

Tsyganok, A. I.; Inaba, Mieko; Tsunoda, Tetsuto; Uchida, Kunio; Suzuki, Kunio; Takehira, Katsuomi; Hayakawa, T.

doi:10.1016/j.apcata.2005.06.007

Cited by 73 publications

(44 citation statements)

References 38 publications

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“…The DRM catalytic activity of Ni/Mg/Al hydrotalcite-derived catalysts promoted with Ru was studied by Tsyganok et al [96]. The addition of small amounts of Ru into the catalyst structure by means of a reconstruction method had a highly positive effect on the catalytic performance.…”

Section: Other Promotersmentioning

confidence: 99%

A Short Review on the Catalytic Activity of Hydrotalcite-Derived Materials for Dry Reforming of Methane

et al. 2017

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Nickel-containing hydrotalcite-derived materials have been recently proposed as promising materials for methane dry reforming (DRM). Based on a literature review and on the experience of the authors, this review focuses on presenting past and recent achievements on increasing activity and stability of hydrotalcite-based materials for DRM. The use of different NiMgAl and NiAl hydrotalcite (HT) precursors, various methods for nickel introduction into HT structure, calcination conditions and promoters are discussed. HT-derived materials containing nickel generally exhibit high activity in DRM; however, the problem of preventing catalyst deactivation by coking, especially below 700 • C, is still an open question. The proposed solutions in the literature include: catalyst regeneration either in oxygen atmosphere or via hydrogasification; or application of various promoters, such as Zr, Ce or La, which was proven to enhance catalytic stability.

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Section: Other Promotersmentioning

confidence: 99%

A Short Review on the Catalytic Activity of Hydrotalcite-Derived Materials for Dry Reforming of Methane

et al. 2017

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“…Preliminary calcination hydrotalcite was shown to markedly affect catalytic behaviour of the derived catalysts and especially their coking capacity. Among all the bimetallic catalysts tested, a Ru0.1%-Ni5.0%/MgAlO x appeared to be the most attractive for the dry reforming of methane because it demonstrated the highest activity and selectivity to syngas, no any induction time when generated in situ, a suitable durability and a low coking capacity [57].…”

Section: Hydrotalcite Precursorsmentioning

confidence: 99%

Recent Developments in the Partial Oxidation of Methane to Syngas

Al-Sayari¹

2013

TOCATJ

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Natural gas is catalytically converted into several bulk chemicals such as ammonia, methanol, dimethyl ether, and synthetic liquid fuels by Fischer-Tropsch synthesis and similar processes. The main step in the conversion of natural gas to these products is the production of synthesis gas with the desired composition ranging from H 2 /CO = 3:1 used for the production of ammonia to the 1:1 mixture preferred for production of dimethyl ether. Catalysts and catalytic processes are important in the production of synthesis gas from natural gas. In this work, relevant catalytic systems employed recently in the production of syngas by the catalytic partial oxidation of methane, as well as experimental evidences on the reaction mechanisms are examined. Differences in methane dissociation, binding site preferences, stability of OH surface species, surface residence times of active species and contributions from lattice oxygen atoms and support species are considered. The methane dissociation requires reduced metal sites, but at elevated temperatures oxides of active species may be reduced by direct interaction with methane or from the reaction with H 2 and CO (or C). The comparison of elementary reaction steps on Pt and Rh illustrates the fact that a key factor to produce hydrogen as primary product is a high activation energy barrier to the formation of OH. Another essential property for the formation of H 2 and CO as primary products is a low surface coverage of intermediates, such that the probability of O-H, OH-H and CO-O interactions is reduced.

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“…The beneficial effect on the stability may be ascribed to the presence of CeO 2 , which reacts with carbon deposited to produce Ce 2 O 3 and CO 2 [20]. Other additions studied as promoters to hydrotalcite-derived catalytic systems containing Ni in DRM included lanthanum [24][25][26], cobalt [27][28][29], rhodium [30], ruthenium [27] and zirconium [31].…”

Section: Introductionmentioning

confidence: 99%

Catalytic activity of hydrotalcite-derived catalysts in the dry reforming of methane: on the effect of Ce promotion and feed gas composition

Dębek

Motak

Gálvez

et al. 2017

Reac Kinet Mech Cat

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Ni/Al and Ni/Mg/Al hydrotalcite-derived materials containing various Ni loadings were synthesized and subsequently promoted with Ce-species via adsorption from [Ce(EDTA)] -complexes. The obtained materials were characterized by elemental analysis (ICP-MS), XRD, H 2 -TPR, CO 2 -TPD, TG and low temperature N 2 sorption experiments. The amount of the introduced Ce was dependent on the nickel and magnesia content in catalysts precursors, and it influenced materials properties (i.e. basicity, reducibility of Ni species) in various ways and the catalytic performance in the dry reforming of methane (DRM). The promoted catalysts showed improved performance with CH 4 and CO 2 conversions at 550°C in the range of 35-55 and 35-45%, respectively. The extent of the improvement was dependent on the nickel content and the presence of magnesia. In general, Ce promotion increased materials stability by changing of the type of carbonaceous deposits. Ce modification hindered the transformation of amorphous carbonaceous deposits to graphitic carbon. The former may be easier oxidized and contribute to syngas production. Two selected catalysts were additionally tested in DRM at elevated temperatures (650 and 750°C) and over various feed gas compositions.

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Rational design of Mg–Al mixed oxide-supported bimetallic catalysts for dry reforming of methane

Cited by 73 publications

References 38 publications

A Short Review on the Catalytic Activity of Hydrotalcite-Derived Materials for Dry Reforming of Methane

A Short Review on the Catalytic Activity of Hydrotalcite-Derived Materials for Dry Reforming of Methane

Recent Developments in the Partial Oxidation of Methane to Syngas

Catalytic activity of hydrotalcite-derived catalysts in the dry reforming of methane: on the effect of Ce promotion and feed gas composition

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