Carbonization of nickel catalysts and its effect on methane dry reforming

Bychkov, V. Yu.; Tyulenin, Yu. P.; Firsova, A. A.; Shafranovsky, E. A.; Gorenberg, A. Ya.; Корчак, В. Н.

doi:10.1016/j.apcata.2012.12.006

Cited by 41 publications

(15 citation statements)

References 25 publications

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“…This behaviour is consistent with the observations of several authors [18,56] that reported the increase of TOF with Ni particle size. Moreover it is known that the rate of methane dehydrogenation depends on Ni particle size [57]. Thus, the trend of specific DRM activity observed in the present study, was primarily due to the different ability of Ni nanoparticles to activate the C-H bond, which is mainly related to the particle size.…”

Section: Catalytic Activitymentioning

confidence: 55%

Ni/CeO2–Al2O3 catalysts for the dry reforming of methane: The effect of CeAlO3 content and nickel crystallite size on catalytic activity and coke resistance

Luisetto

Tuti

Battocchio

et al. 2015

Applied Catalysis A: General

254

126

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Section: Catalytic Activitymentioning

confidence: 55%

Ni/CeO2–Al2O3 catalysts for the dry reforming of methane: The effect of CeAlO3 content and nickel crystallite size on catalytic activity and coke resistance

Luisetto

Tuti

Battocchio

et al. 2015

Applied Catalysis A: General

254

126

View full text Add to dashboard Cite

“…used thermogravimetry reactor coupled with mass spectrometry (TG‐MS) to study the formation and reactivity of carbon deposits from DRM over a Ni/Al 2 O 3 catalyst. Based on the weight variation of the catalyst monitored by TG and the gas analysis of the effluent by MS, interactions between carbon and CH 4 , CO 2 , H 2 or CH 4 ‐CO 2 mixture were investigated . Chen et al.…”

Section: Figurementioning

confidence: 99%

Measuring the Unmeasurable by IR Spectroscopy: Carbon Deposition Kinetics in Dry Reforming of Methane

et al. 2018

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Dry reforming of methane converts two greenhouse gases to syngas, and Ni catalysts are commonly used for this reaction. A major catalyst deactivation mechanism is carbon deposition. Although numerous kinetic modelling works have been performed on carbon formation, there have been only scarce attempts to measure carbon deposition kinetics under relevant (but not real) conditions, owing to technical difficulties. Here, we report the first successful measurements of the kinetics under real reaction conditions. This was made possible by using a novel algorithm that we have developed. We use IR to measure the molar fractions of unreacted CH and CO , and reaction products, CO and H O, in the effluent from the reactor. By applying the general mass balance principle and the relevant reaction stoichiometries, the carbon deposition rate as well as the flow rates of all these gases in the effluent, including H , are calculated. Compared to the dominant GC-based approach for catalyst performance evaluation, this method has much higher time resolution and much smaller measurement errors.

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“…The latter in situ methods allow kinetic analysiso fc oke formation and thus make deeper fundamental understanding of coke formation possible. They were instrumental in elucidating relations between coking behavior and catalytic activity in severalr eactions [20][21][22][23] including propanedehydrogenation on CrO x - [24,25] and Pt-based [26][27][28] catalysts. To our knowledge,t here are no mechanistic and kinetic studies of coke formation in propane DH over VO x -based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

et al. 2015

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VOx/SiO2–Al2O3 catalysts were prepared by grafting vanadyl acetylacetonate onto the supports with a SiO2 content between 0 and 100 wt. %. The degree of polymerization of VOx species and acidity both of pristine supports and the catalysts were evaluated. To determine their on‐stream stability and carbon deposition activity in nonoxidative propane dehydrogenation, continuous‐flow tests and in situ thermogravimetric measurements were performed. The rate constants of catalyst deactivation and carbon deposition were derived from kinetic evaluation of these experiments. Gathered experimental evidence pointed out that VOx species were significantly more active for coke formation than acid sites of the supports. The rate constant of carbon formation was found to increase with the degree of polymerization of VOx species, whereas no correlation between catalyst acidity and the rate constants of coking or deactivation could be drawn.

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Carbonization of nickel catalysts and its effect on methane dry reforming

Cited by 41 publications

References 25 publications

Ni/CeO2–Al2O3 catalysts for the dry reforming of methane: The effect of CeAlO3 content and nickel crystallite size on catalytic activity and coke resistance

Ni/CeO2–Al2O3 catalysts for the dry reforming of methane: The effect of CeAlO3 content and nickel crystallite size on catalytic activity and coke resistance

Measuring the Unmeasurable by IR Spectroscopy: Carbon Deposition Kinetics in Dry Reforming of Methane

Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

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Carbonization of nickel catalysts and its effect on methane dry reforming

Cited by 41 publications

References 25 publications

Ni/CeO2–Al2O3 catalysts for the dry reforming of methane: The effect of CeAlO3 content and nickel crystallite size on catalytic activity and coke resistance

Ni/CeO2–Al2O3 catalysts for the dry reforming of methane: The effect of CeAlO3 content and nickel crystallite size on catalytic activity and coke resistance

Measuring the Unmeasurable by IR Spectroscopy: Carbon Deposition Kinetics in Dry Reforming of Methane

Effect of VOx Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

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Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation