Ni/MgAl2O4 catalyst for low-temperature oxidative dry methane reforming with CO2

Shen, Jing; Reule, Allen A.C.; Semagina, Natalia

doi:10.1016/j.ijhydene.2019.01.027

Cited by 65 publications

(23 citation statements)

References 59 publications

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“…Noble metals, however, are unattractive for commercial and industrial applications due to their natural scarcity and high cost. This impediment has forced research to develop BDR catalysts based on cheap and abundant transition metals and numerous studies have been performed over various un-promoted or promoted oxide supports [35][36][37]. Ni based systems have shown excellent intrinsic activity, especially when the active metal particles are widely dispersed over the support [38,39].…”

Section: Introductionmentioning

confidence: 99%

The Relationship between Reaction Temperature and Carbon Deposition on Nickel Catalysts Based on Al2O3, ZrO2 or SiO2 Supports during the Biogas Dry Reforming Reaction

et al. 2019

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The tackling of carbon deposition during the dry reforming of biogas (BDR) necessitates research of the surface of spent catalysts in an effort to obtain a better understanding of the effect that different carbon allotropes have on the deactivation mechanism and correlation of their formation with catalytic properties. The work presented herein provides a comparative assessment of catalytic stability in relation to carbon deposition and metal particle sintering on un-promoted Ni/Al2O3, Ni/ZrO2 and Ni/SiO2 catalysts for different reaction temperatures. The spent catalysts were examined using thermogravimetric analysis (TGA), Raman spectroscopy, high angle annular dark field scanning transmission electron microscopy (STEM-HAADF) and X-ray photoelectron spectroscopy (XPS). The results show that the formation and nature of carbonaceous deposits on catalytic surfaces (and thus catalytic stability) depend on the interplay of a number of crucial parameters such as metal support interaction, acidity/basicity characteristics, O2– lability and active phase particle size. When a catalytic system possesses only some of these beneficial characteristics, then competition with adverse effects may overshadow any potential benefits.

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Section: Introductionmentioning

confidence: 99%

The Relationship between Reaction Temperature and Carbon Deposition on Nickel Catalysts Based on Al2O3, ZrO2 or SiO2 Supports during the Biogas Dry Reforming Reaction

et al. 2019

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“…Biogas, a mixture of gases mainly containing CH4 and CO2, can be obtained by the anaerobic digestion of various bio-resources and the transformation of biogas has received growing interest [2][3][4][5][6][7][8]. Although operating at low temperature is of enormous importance because of environmental, economic and maintenance reasons; it remains a great challenge for CH4 and CO2 transformations in the same time [9,10]. The CO2 reforming with CH4 is an endothermic process, so called dry reforming (DRM, Eq.1).…”

Section: Introductionmentioning

confidence: 99%

“…The CO2 reforming with CH4 is an endothermic process, so called dry reforming (DRM, Eq.1). This type of reaction is attractive from an environmental point of view, since it consumes two major greenhouse gases [5][6][7][9][10][11][12][13][14]. However, the main drawback of DRM is the deactivation of the catalyst due to heavy carbon deposition (particularly at low temperature) [2][3][4][5][6]15] and the sintering of the active phase [5,6,11].…”

Section: Introductionmentioning

confidence: 99%

“…Co-feeding O2 with CH4 and CO2 (ODRM, Eq. 2) provides several advantages such as reducing the global energy requirement and enhancing catalyst stability, by increasing deactivation resistance and inhibiting the carbon deposition rate by gasifying carbon species, however it decreases the CO2 conversion [10,11,[16][17][18][19][20][21][22][23][24][25][26][27]. Avoiding carbon formation (Eqs.…”

Section: Introductionmentioning

confidence: 99%

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CeNiXAl0.5HZOY nano-oxyhydrides for H2 production by oxidative dry reforming of CH4 without carbon formation

Wei

Liu

Haidar

et al. 2020

Applied Catalysis A: General

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“…Ni based catalysts are often used due to their cheap price, abundance, and quick turnover rates [15]. Main difficulties encountered in using Ni-based catalysts come from the sintering which causes the loss of active metal surface areas and the carbon deposition on the surface, which deactivates and reduces the activity by covering the active metal surface and alters product selectivity [16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pressure on Na0.5La0.5Ni0.3Al0.7O2.5 Perovskite Catalyst for Dry Reforming of CH4

et al. 2020

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In this paper, a comprehensive study was carried out on the application of perovskite catalyst in dry reforming of CH4. The perovskite catalyst was prepared using a sol–gel method. The prepared samples were characterized by N2 adsorption/desorption, TPR, XRD, CO2-TPD, TGA, TPO, Raman, and SEM techniques. In addition, the effect of operating pressure, namely, 1 bar, 3 bar, 5 bar, and 7 bar, temperature (500–800 °C) was evaluated. The characterization results indicated that catalysts operated at 1 bar, gas hourly space velocity of 84000 (mL/g/h) gave the best catalytic performance. CH4 and CO2 conversions of 77 and 80% were obtained at 1 bar and at 700 °C reaction temperature. The increase of reaction temperatures from 500 °C to 800 °C increased the reaction rate and hence the methane and carbon dioxide conversions were increased. A unity ratio of H2/CO was obtained at 1 bar for temperatures 600 °C and above. Similarly, the time on stream tests, obtained at a 700 °C reaction temperature, showed that the best ratio in terms of the closeness of unity and the stable profile could be attained when the pressure was set to 1 bar. The TGA analysis showed the drop of mass due to oxidation of carbon deposits, which started at 500 °C. The catalyst operated at 1 bar produced the least amount of carbon, equivalent to 35% weight loss, while the 3 and 5 bar operated catalysts generated carbon formation, equivalent to 65% weight loss. However, the 7 bar operated catalyst resulted the highest accumulation of carbon formation, equivalent to 83% weight reduction. Hence, the TGA profile indicated the relative carbon deposition on the catalyst, which was dependent of the operated pressure and hence confirmed the suitability operation pressure of 1 bar. The characterizations of the Raman, EDX, TGA, and TPO all presented the formation of carbon.

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Ni/MgAl2O4 catalyst for low-temperature oxidative dry methane reforming with CO2

Cited by 65 publications

References 59 publications

The Relationship between Reaction Temperature and Carbon Deposition on Nickel Catalysts Based on Al2O3, ZrO2 or SiO2 Supports during the Biogas Dry Reforming Reaction

The Relationship between Reaction Temperature and Carbon Deposition on Nickel Catalysts Based on Al2O3, ZrO2 or SiO2 Supports during the Biogas Dry Reforming Reaction

CeNiXAl0.5HZOY nano-oxyhydrides for H2 production by oxidative dry reforming of CH4 without carbon formation

Effect of Pressure on Na0.5La0.5Ni0.3Al0.7O2.5 Perovskite Catalyst for Dry Reforming of CH4

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