Development of Ni-Pd bimetallic catalysts for the utilization of carbon dioxide and methane by dry reforming

Steinhauer, Bernd; Kasireddy, Mohan Reddy; Radnik, Jörg; Martin, Andreas

doi:10.1016/j.apcata.2009.07.021

Cited by 155 publications

(98 citation statements)

References 41 publications

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“…This may have attributed to the fact that the Pd and Pt transfer the electron density to their Ni metal (main catalyst) in the trimetallic catalyst, as described in our previous work (10). This result is consistent with the hypothesis that Pt and Pd can prevent the oxidation of Ni as its electron density increases [40,41]. When the Pt-Ni or Pd-Ni bi-metallic cluster is formed, the reducibility of Ni increased.…”

Section: Stability Testssupporting

confidence: 79%

Effects of Platinum and Palladium Metals on Ni/Mg1-xZrxO Catalysts in the CO2 Reforming of Methane

Al-Doghachi

2018

Bull. Chem. React. Eng. Catal.

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Nickel, palladium, and platinum catalysts (1 wt.% each) supported on MgO and MgZrO to prepare Pt,Pd,Ni/Mg1-xZrxO catalysts (where x = 0, 0.03, 0.07, and 0.15), were synthesized by using coprecipitation method with K2CO3 as the precipitant. X-ray diffraction (XRD), X-ray fluorescence (XRF), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), H2-temperature programmed reduction (H2-TPR), and thermo gravimetric analysis (TGA) were employed to observe the characteristics of the prepared catalysts. The Pt,Pd,Ni/Mg0.85Zr0.15O showed the best activity in dry reforming of methane (DRM) with 99 % and 91 % for CO2 and CH4 conversions, respectively and 1.28 for H2/CO ratio at temperature 900 °C and 1:1 of CH4:CO2 ratio. The stability of Pt,Pd,Ni/Mg0.85Zr0.15O catalyst in the presence and absence of low stream 1.25 % oxygen was investigated. Carbon formation and amount in spent catalysts were examined by TEM and TGA in the presence of stream oxygen. The results showed that the amount of carbon was suppressed and negligible coke formation (less than 3 %) was observed. Several effects were observed with ZrO2 use as a promoter in the catalyst. Firstly, the magnesia cubic phase stabilized. Secondly, thermal stability and support for basicity increased. Thirdly, carbon deposition and the reducibility of Ni 2+ , Pd 2+ , and Pt 2+ ions decreased.

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Section: Stability Testssupporting

confidence: 79%

Effects of Platinum and Palladium Metals on Ni/Mg1-xZrxO Catalysts in the CO2 Reforming of Methane

Al-Doghachi

2018

Bull. Chem. React. Eng. Catal.

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“…The supported catalyst can play an important role in promoting reaction, which has been proven by many researchers after making a direct comparison between bulk and supported materials on a variety of supports, such as TiO 2 , Al 2 O 3 , SiO 2 , and ZrO 2 [3,12,19].…”

Section: Introductionmentioning

confidence: 99%

Dry reforming of methane over ZrO2-supported Co–Mo carbide catalyst

Кузнецов

Xiao

et al. 2014

Appl Petrochem Res

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The process of dry reforming of methane has the potential to be an effective route for CO 2 utilization via syn-gas production. In the present study, ZrO 2 -supported Co-Mo bimetallic carbide catalysts were prepared via a coprecipitation method through a combined reduction and carburization procedure employing a CH 4 /H 2 (20/80 %) mixture. All of the as-synthesized materials were tested at 850°, under atmospheric pressure and a CO 2 :CH 4 ratio of 1. The importance of the ZrO 2 support became immediately apparent when it exhibited a higher conversion than the corresponding low-surface-area bulk Mo 2 C catalyst, which we attribute to lewis acid and base active sites on the surface of ZrO 2 . From catalytic tests and pre-and postreaction X-ray diffraction (XRD) patterns, we observed that different dispersions of the monometallic carbides, caused by varying the pre-heating temperatures on ZrO 2 , did not significantly affect conversion or yield. In contrast, incorporation of cobalt atoms into the Mo 2 C lattice significantly enhanced the conversion, yield and stability of the catalysts. Post-reaction XRD patterns indicated that the bimetallic carbide had enhanced the resistance to the oxidation effect that is known to deactivate Mo 2 C catalysts. In addition, increasing the Co loading in the mixed metal carbides was seen to enhance the resistance of the catalyst to the reverse water gas shift reaction, leading to improved stability of the H 2 yields.

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“…Supported noble metals, such as Rh, Ru and Ir, have shown high activity, selectivity and stability for MDR [4][5][6][7][8], substantially avoiding coke formation. Ni-based catalysts [9][10][11], have also shown remarkable activity with, however, less stability than noble metals.…”

Section: Introductionmentioning

confidence: 99%

Enhanced catalytic stability through non-conventional synthesis of Ni/SBA-15 for methane dry reforming at low temperatures

Gálvez

Albarazi

Costa

2015

Applied Catalysis A: General

108

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Development of Ni-Pd bimetallic catalysts for the utilization of carbon dioxide and methane by dry reforming

Cited by 155 publications

References 41 publications

Effects of Platinum and Palladium Metals on Ni/Mg1-xZrxO Catalysts in the CO2 Reforming of Methane

Effects of Platinum and Palladium Metals on Ni/Mg1-xZrxO Catalysts in the CO2 Reforming of Methane

Dry reforming of methane over ZrO2-supported Co–Mo carbide catalyst

Enhanced catalytic stability through non-conventional synthesis of Ni/SBA-15 for methane dry reforming at low temperatures

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