Surface and structural features of Pt/PrO2–Al2O3 catalysts for dry methane reforming

Tankov, Ivaylo; Arishtirova, K.; Bueno, J.M.C.; Damyanova, S.

doi:10.1016/j.apcata.2013.08.030

Cited by 51 publications

(24 citation statements)

References 63 publications

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“…H 2 ) produced through the DRM process has a hydrogen-to-carbon monoxide ratio close to unity, which is industrially advantageous compared to steam reforming or partial oxidation of methane and can be preferentially used in the Fischer-Tropsch synthesis industry to produce valuable chemicals, e.g., higher hydrocarbons [5,7]. On the other hand, H 2 , CO or H 2 ?…”

Section: Introductionmentioning

confidence: 99%

“…Reaction (1) can be also applied as an alternative route for the utilization of biogas (a mixture primarily comprised of CH 4 and CO 2 within the following composition: CH 4 = 50-70 %, CO 2 = 25-50 %) produced via anaerobic fermentation or digestion of mostly waste materials [1,7,13,16]. DRM has been investigated over a variety of metal catalysts, including Ni [5,[16][17][18][19][20][21][22][23][24][25], Pt [2,18,26,27], Rh [8,17,[26][27][28][29][30], Ru [26,27,31,32], Pd [17,26,27,33], Co [26,28] and Ir [26,27,34,35], supported on oxide (e.g., Al 2 O 3 , La 2 O 3 , CeO 2 , SiO 2 , TiO 2 ,) or mixed oxide supports (e.g., La 2 O 3 -SiO 2 , ZrO 2 -SiO 2 , PrO 2 -Al 2 O 3 ).…”

Section: Introductionmentioning

confidence: 99%

“…Among the various technologies which have been proposed for hydrogen production, the reaction of methane reforming with carbon dioxide (reaction 1), the so called dry reforming of methane (DRM), is of special interest since both methane and carbon dioxide are greenhouse gases which can be converted into valuable feedstock [5][6][7][8] for both petrochemical industry and fuel cells based energy plants.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports

et al. 2015

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The impact of the support on the Ir-catalyzed dry (CO 2 ) reforming of methane (DRM) reaction is explored in the present study. With this aim, supported iridium catalysts Ir/c-Al 2 O 3 , Ir/YSZ and Ir/GDC with 1 wt% iridium loading, using c-Al 2 O 3 , 8 mol% Y 2 O 3 stabilized ZrO 2 (YSZ: Zr 0.92 Y 0.08 O 2-d ) and 10 mol% Gd 2 O 3 doped CeO 2 (GDC: Ce 0.9 Gd 0.1 O 2-d ) as supports were comparatively studied in the temperature range of 400-850°C. The feasibility of tuning the catalytic performance and/or stability of the Ir active phase during DRM reaction, via support-induced interactions, was investigated. All catalysts were found to be extremely active and stable over time on stream. No significant effects induced by the support were observed at the high operating temperature of DRM. However, opposite to Ir/cAl 2 O 3 and Ir/YSZ samples, Ir/GDC provides the benefit to be stable in oxidation steps and/or oxidation-reduction cycles. This is of significant practical importance since such treatment procedures are often used in practice for catalysts regeneration. Besides catalytic performance measurements, extended hydrogen temperature-programmed reduction experiments, supported further by transmission electron microscopy characterization studies were carried out in order to reveal the impact of the support on the aforementioned stability and its origin.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports

et al. 2015

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“…, considering the samples were calcined in air for 3 h. Further, the peak located at 250 °C could be associated with the reduction of Pt oxide species weakly associated with alumina surface 39 . Moreover, the temperature features of high intensity at 461 °C could be connected with the reduction of clustered and isolated platinum particles 39 .…”

mentioning

confidence: 97%

Effects of CeO2 Addition on Improved NO Oxidation Activities of Pt/SiO2-Al2O3 Diesel Oxidation Catalysts

HUANG¹,

ZHANG²,

YANG³

et al. 2017

Acta Physico-Chimica Sinica

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The catalytic activities for NO oxidation achieved by different amounts of CeO2-modified Pt/SiO2-Al2O3 catalysts Pt/SiO2-Al2O3-wCeO2 (the mass fraction w being 0%, 5%, 10%, 15%, 30%), prepared using step-wise impregnation, were investigated in the presence and absence of CO and C3H6. The results showed that the NO oxidation activity could be efficiently improved by modification of CeO2, No.6 HUANG Yu-Fen et al.: Effects of CeO 2 Addition on Improved NO Oxidation Activities of Pt/SiO 2-Al 2 O 3 DOCs 1243 wherein the 15%-CeO2-modified catalyst exhibited the maximum NO conversion of 61% even in the presence of CO and C3H6, which were proved to inhibit NO2 formation in this study. A series of characterization methods were performed over the as-prepared samples to correlate their surface and structural characteristics with their enhanced NO oxidation activities. CO-chemisorption illustrated that appropriate CeO2-loading was effective for enhancing Pt dispersion, thus enhancing Pt surface-to-volume ratio, confirmed by transmission electron microscope (TEM) images. X-Ray Diffraction (XRD) further suggested that ceria addition could suppress the growth of the Pt crystal, resulting in higher surface Pt atomic ratio. Further, H2 temperature-programmed reduction (H2-TPR), together with TEM results, implied that the presence of ceria could enhance the interaction between metal and supports, thus facilitating reducibility of both active platinum and ceria. Hence, this study displays that ceria could act as a dispersion promoter and a reducibility booster, both of which are beneficial to NO oxidation activity. The improved NO oxidation activity is significant for the efficient purification of diesel integrated catalytic system.

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“…Pt-based catalyst Kahle et al (2013); Tankov, Arishtirova, Bueno, and Damyanova (2014); Pakhare, Shaw, Haynes, Shekhawat, and Spivey (2013); García-Diéguez, Finocchio, Larrubia, Alemany (2010) Ir-based catalyst Nematollahi et al (2011);Milanov, Schwab, Schunk, and Wasserschaff (2013) …”

mentioning

confidence: 99%

Membrane reactors for dry reforming of methane

Minardi

Chakraborty

Curcio

2015

Membrane Reactors for Energy Applications and Basic Chemical Production

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Surface and structural features of Pt/PrO2–Al2O3 catalysts for dry methane reforming

Cited by 51 publications

References 63 publications

Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports

Dry Reforming of Methane: Catalytic Performance and Stability of Ir Catalysts Supported on γ-Al2O3, Zr0.92Y0.08O2−δ (YSZ) or Ce0.9Gd0.1O2−δ (GDC) Supports

Effects of CeO<sub>2</sub> Addition on Improved NO Oxidation Activities of Pt/SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> Diesel Oxidation Catalysts

Membrane reactors for dry reforming of methane

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