Dry reforming of methane over Ni/ZrO 2 -Al 2 O 3 catalysts: Effect of preparation methods

Shin, Seol A.; Noh, Young Su; Hong, Gi Hoon; Park, Ji In; Song, Hyun Tae; Lee, Kwan Young; Moon, Dong Ju

doi:10.1016/j.jtice.2017.11.032

Cited by 47 publications

(22 citation statements)

References 36 publications

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“…These characteristics and other properties of the catalysts very often depend on the preparation method and conditions. 13,33 In one study, as an example, the interaction of Ni with the support in Ni/Al 2 O 3 -ZrO 2 catalyst, was found to be strongly dependent on the preparation method, which eventually played a key role in its catalytic activity and carbon formation resistance. 33 In this study, the investigators found that catalysts prepared by Pechini solgel method showed higher stability compared to other methods.…”

Section: Introductionmentioning

confidence: 99%

“…13,33 In one study, as an example, the interaction of Ni with the support in Ni/Al 2 O 3 -ZrO 2 catalyst, was found to be strongly dependent on the preparation method, which eventually played a key role in its catalytic activity and carbon formation resistance. 33 In this study, the investigators found that catalysts prepared by Pechini solgel method showed higher stability compared to other methods. In another study, preparation of Ni catalyst over different supports through impregnation was compared with preparation via solid-state reactions, and the characteristics of the catalysts were strongly dependent on the preparation method.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced selectivity of syngas in partial oxidation of methane: A new route for promising Ni‐alumina catalysts derived from Ni/ γ‐AlOOH with modified Ni dispersion

et al. 2020

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Partial oxidation of methane was studied over new Ni nanocatalysts prepared from Ni-impregnated γ-AlOOH, which were compared with their counterparts derived from impregnated γ-Al 2 O 3 and α-Al 2 O 3. The prepared catalysts were characterized by powder X-ray diffraction (XRD), N 2-sorption, H 2-temperatue programmed reduction, scanning electron microscopy, transmission electron microscopy, thermal gravimetric analysis, CO 2-and NH 3-temperatureprogrammed desorption, Raman spectroscopy, CO chemisorption, and diffuse reflectance infrared Fourier transform spectroscopy of adsorbed CO. Employing γ-AlOOH as the support precursor resulted in significantly improved textural properties and catalytic activity. The structure of the support precursor and its surface properties showed a strong influence on the type of Ni active species and their interactions with the support. γ-AlOOH-derived catalysts showed NiO as the dominant Ni species when calcined at 500 C to 650 C, while NiAl 2 O 4 became the sole phase at higher temperatures. On the other hand, mixtures of NiO and NiAl 2 O 4 formed over γ-Al 2 O 3 , calcined before impregnation, regardless of the precalcination temperature. All γ-AlOOHderived catalysts showed higher specific surface areas compared to their counterparts derived from impregnated γ-Al 2 O 3. Upon calcination at moderate temperatures, γ-AlOOH-derived catalysts also showed modified textural and morphological properties of the Ni active particles, including higher Ni dispersion, larger metal surface area, and smaller Ni crystallites. The support precursor and the pretreatment conditions showed a strong influence on the catalytic performance, which was referred to their significant effect on the type of the Ni species and interactions with the support. All catalysts showed higher catalytic activity than the α-Al 2 O 3-derived catalyst, with CH 4 conversion between 86% and 88.5% at 700 C. While γ-AlOOHand γ-Al 2 O 3-derived catalysts calcined at 650 C showed a stable CH 4 conversion around 88%, and higher syngas

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced selectivity of syngas in partial oxidation of methane: A new route for promising Ni‐alumina catalysts derived from Ni/ γ‐AlOOH with modified Ni dispersion

et al. 2020

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“…Besides, the above catalysts prepared by the sol-gel method also generated more oxygen vacancies and stronger metal-support interaction with CeZrO 2 and Ni than the impregnated Ni/CeO 2 catalyst. Shin et al (2018) reported that the Ni/ZrO 2 -Al 2 O 3 catalyst prepared by Pechini sol-gel method showed higher stability than those synthesized by urea hydrolysis and physical mixing methods due to the strong metal-support interaction between Ni and ZrO 2 -Al 2 O 3 , which further promoted the dissociation of CO 2 .…”

Section: Preparation Methodsmentioning

confidence: 99%

“…Similar to Al 2 O 3 , ZrO 2 also possesses both basic and acidic properties and is widely used as the catalytic support (Shin et al, 2018). As a support, it can form the strong metal-support interaction with the Ni active site.…”

Section: Oxide Supports Single Oxide Supportsmentioning

confidence: 99%

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

Chen

et al. 2020

Front. Chem.

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CO 2 reforming of methane (CRM) can effectively convert two greenhouse gases (CO 2 and CH 4) into syngas (CO + H 2). This process can achieve the efficient resource utilization of CO 2 and CH 4 and reduce greenhouse gases. Therefore, CRM has been considered as a significantly promising route to solve environmental problems caused by greenhouse effect. Ni-based catalysts have been widely investigated in CRM reactions due to their various advantages, such as high catalytic activity, low price, and abundant reserves. However, Ni-based catalysts usually suffer from rapid deactivation because of thermal sintering of metallic Ni active sites and surface coke deposition, which restricted the industrialization of Ni-based catalysts toward the CRM process. In order to address these challenges, scientists all around the world have devoted great efforts to investigating various influencing factors, such as the option of appropriate supports and promoters and the construction of strong metal-support interaction. Therefore, we carefully summarized recent development in the design and preparation of Ni-based catalysts with advanced catalytic activity and enhanced anti-coke performance toward CRM reactions in this review. Specifically, recent progresses of Ni-based catalysts with different supports, additives, preparation methods, and so on, have been summarized in detail. Furthermore, recent development of reaction mechanism studies over Ni-based catalysts was also covered by this review. Finally, it is prospected that the Ni-based catalyst supported by an ordered mesoporous framework and the combined reforming of methane will become the future development trend.

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“…In our previous research, a series of Ni/ZrO 2 -Al 2 O 3 catalysts were synthesized successfully for use in the DRM [26]. To our knowledge, there are few studies on mixed metal oxide support TiO 2 -ZrO 2 , and there has been no report about ternary support composition (Zr, Ti, Al) in the DRM.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Ni/ZrTiAlOx Catalyst via Sol-Gel and Impregnation Methods for Low Temperature Dry Reforming of Methane

et al. 2020

Self Cite

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Recently, the dry reforming of methane (DRM) has received much attention as a conversion technology of greenhouse gases. Ni-based catalysts supported on ternary metal oxide composite (ZrTiAlOx) were prepared to improve the coke resistance properties in the DRM (CH4:CO2 = 1) at low temperature. The ZrTiAlOx supports with different ratios of Zr/Ti were prepared through the modified Pechini sol-gel method, and then the Ni was impregnated on the synthesized support via the incipient wetness impregnation method. Considering the Zr/Ti ratios, different catalytic activity and durability in the DRM were identified. The Ni/ZrTiAlOx catalyst with Zr/Ti of 2 exhibited enhanced coke inhibition property compared to the others at low temperature DRM for 50 h. The catalysts with a high Zr/Ti ratio under the same condition were rapidly deactivated, while the catalyst with a low Zr/Ti ratio showed deficient activity. It was found from temperature-programmed surface reactions (TPSR) and DRIFTS (Diffuse Reflectance Infrared Fourier Transform Spectroscopy) analysis that the addition of Ti has led in to higher catalytic stability at Zr/Ti = 2, which could be as a result of oxygen vacancies generated by the ternary metal oxides. Ni/ZrTiAlOx catalyst with ratio of Zr/Ti = 2 showed high stability and good catalytic activity towards DRM for the production of syngas.

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Dry reforming of methane over Ni/ZrO 2 -Al 2 O 3 catalysts: Effect of preparation methods

Cited by 47 publications

References 36 publications

Enhanced selectivity of syngas in partial oxidation of methane: A new route for promising Ni‐alumina catalysts derived from Ni/ γ‐AlOOH with modified Ni dispersion

Enhanced selectivity of syngas in partial oxidation of methane: A new route for promising Ni‐alumina catalysts derived from Ni/ γ‐AlOOH with modified Ni dispersion

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

Preparation and Characterization of Ni/ZrTiAlOx Catalyst via Sol-Gel and Impregnation Methods for Low Temperature Dry Reforming of Methane

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