Effect of Mg/Al ratio of NiMgAl mixed oxide catalyst derived from hydrotalcite for carbon dioxide reforming of methane

Zhu, Yanli; Zhang, Shaohua; Chen, Bingbing; Zhang, Zhaoshun; Shi, Chuan

doi:10.1016/j.cattod.2015.07.037

Cited by 77 publications

(48 citation statements)

References 44 publications

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“…for calcined NiMgAl-hydrotalcites by Pavel et al [23] Basic properties, memory effect, and ability to exchange anions make them good catalysts and adsorbents [3] [19]. Ni-containing double layered hydroxides were found to be active in the DRM [3,14,[24][25][26][27][28][29][30]. After appropriate thermal treatment DLHs form nano-oxides whose strong interaction hinders Ni from sintering at high temperatures required for DRM [30].…”

Section: Introductionmentioning

confidence: 99%

Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming

Świrk

Gálvez

Motak

et al. 2018

Journal of CO2 Utilization

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Yttrium modified Ni-based double-layered hydroxides were tested as novel catalysts in dry methane reforming. The catalysts were characterized by XRF, BET analysis, XRD, TPR-H 2 , TPD-CO 2 , TGA/DSC-MS, H 2 chemisorption and TEM. Co-precipitation with yttrium (III) nitrate hexahydrate resulted in increased specific surface area, smaller Ni crystallite size, enhanced reducibility, and higher distribution of weak and medium basic sites as compared to Y-free material. The DRM catalytic tests, carried out in the temperature range of 850-600 ºC, led to a significant improvement of activity, with the 1.5 wt % Y-promoted catalyst being the most efficient in converting both CH 4 and CO 2. Moreover, the 10 h test at 700 ºC further confirmed enhanced stability for this HTNi-Y1.5 catalyst. Higher CO 2 conversion than CH 4 conversion and less CO compared to H 2 proves that side reactions are occurring simultaneously.

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Section: Introductionmentioning

confidence: 99%

Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming

Świrk

Gálvez

Motak

et al. 2018

Journal of CO2 Utilization

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“…Recently, a lot of attention has been paid to the study of to hydrotalcite-derived materials as possible catalysts for DRM [12][13][14][15][16][17][18]. To improve the stability of the Nibased catalysts, various promoters were proposed.…”

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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“…Further research may be needed in order to assess this important point. The influence of Mg/Al molar ratio in Ni/Mg/Al hydrotalcites was first examined by Zhu et al [53]. These authors considered the variation of the Mg/Al molar ratio from 1/5 to 5.…”

Section: Catalytic Activity Of Hydrotalcite-derived Materials In Dry mentioning

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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Effect of Mg/Al ratio of NiMgAl mixed oxide catalyst derived from hydrotalcite for carbon dioxide reforming of methane

Cited by 77 publications

References 44 publications

Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming

Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming

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

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

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