Reforming and oxidative dehydrogenation of ethane with CO2 as a soft oxidant over bimetallic catalysts

Myint, MyatNoeZin; Yan, Binhang; Wan, Jie; Zhao, Shen; Chen, Jingguang G.

doi:10.1016/j.jcat.2016.02.004

Cited by 133 publications

(104 citation statements)

References 36 publications

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“…However, if Fe were to be the metal replacing Pt 1 then the wt% would be 0.48% and the nomenclature would be Fe 1 . For this investigation metal loadings, calcination, and drying treatment conditions were consistent with previous studies …”

Section: Methodssupporting

confidence: 87%

The effects of bimetallic interactions for CO₂‐assisted oxidative dehydrogenation and dry reforming of propane

2019

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The catalytic reduction of CO 2 by propane may occur via dry reforming to produce syngas (CO + H 2 ) or oxidative dehydrogenation to yield propylene. Utilizing propane and CO 2 as coreactants presents several advantages over conventional methane dry reforming or direct propane dehydrogenation, including lower operating temperatures and less coke formation. Thus, it is of great interest to identify catalytic systems that can either effectively break the C C bond to generate syngas or selectively break C H bonds to produce propylene. In this study, several precious and nonprecious bimetallic catalysts supported on reducible CeO 2 were investigated using flow reactor studies at 823 K to identify selective catalysts for CO 2 -assisted reforming and dehydrogenation of propane. K E Y W O R D SCeO 2 , CO 2 soft oxidant, propane, propylene, synthesis gas | INTRODUCTIONCarbon dioxide management is a prominent issue facing society that requires a diverse portfolio of innovative technologies. High atmospheric concentrations of CO 2 contribute to adverse effects that impact human health and the climate. The need to reduce CO 2 is evident, and the International Panel on Climate Change has stated that climate stabilization (no more than a 2 C rise from preindustrial levels) will require a combination of mitigation, utilization, and even negative emission technologies. 1 Thus, one key approach will be to transform abundant CO 2 into a useful feedstock for processes that not only produce high value products but also match the scale necessary to impact anthropogenic emissions.The two most relevant reactions for the catalytic conversion of CO 2 to CO are reverse water gas shift (RWGS) and dry reforming of methane (DRM). The CO product can be utilized as feedstock for Fischer-Tropsch reactions or methanol synthesis. These two reduction chemistries are not without obstacles, beginning with the challenge that CO 2 is the most thermodynamically stable carbon/oxygen-based molecule (ΔG F = −394 kJ mol −1 ). 2 Current implementation of RWGS has limited feasibility since efforts to obtain large amounts of renewable and CO 2 -free hydrogen are still under development. 3 Furthermore, high coke deposition rates at the reaction temperatures required for DRM hinders further significant improvements in catalyst stability. 4,5 A viable alternative is to utilize other light hydrocarbons, such as ethane or propane, as feedstock for CO 2 reduction. In addition to reforming, these light alkanes contain the C C bond that can be advantageously utilized to build olefins. 6 Thus, the reduction of CO 2 via light alkanes offers two distinct reaction pathways: dry reforming and oxidative dehydrogenation. Specifically, it is of interest to explore the use of propane due to its increasing abundance, competitive pricing, and the demand for propylene, which is one of the most diverse petrochemical building blocks used in the production of various chemicals such as fibers and textiles for a variety of applications.Currently, propylene is primarily coproduced by...

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Section: Methodssupporting

confidence: 87%

The effects of bimetallic interactions for CO₂‐assisted oxidative dehydrogenation and dry reforming of propane

2019

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“…The value of H 2 : CO decreased slightly from 800 °C to 900 °C due to the enhancement of side reactions [Eqs. (R5) and (R6)], which resulted in carbon deposition ,

true {CO}_{2} + H_{2} \to CO + H_{2} normalO

true C_{2} H_{6} \to C_{2} H_{4} + H_{2}

true {CH}_{4} + {CO}_{2} \to 2 normalC + 2 H_{2} normalO

true {2 normalC}_{2} H_{6} + 3 {CO}_{2} \to 7 normalC + 6 H_{2} normalO

…”

Section: Resultsmentioning

confidence: 99%

“…There are also some reports on the dry reforming of ethane (DRE), because DRE also provides an efficient way to produce syngas . Compared with DRM, DRE occurs at 100 K lower than that of DRM because of the difference in thermodynamics . However, the carbon content in ethane is more than that of methane.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, improving the conversion of ethane and reducing the carbon formation are widely studied in DRE . Normally, Ni‐based material is widely used as a catalyst to increase the syngas yield or conversion of reactant gas ,,. In order to promote the stability of the catalyst, CeO 2 is applied as a promoter or support because of its high oxygen mobility, high oxygen storage capacity and strong interaction with the support .…”

Section: Introductionmentioning

confidence: 99%

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Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al₂O₃ Catalyst: Syngas Production Enhanced over Ni‐CeO_x Formation

Liu

Akhtamberdinova

et al. 2018

ChemCatChem

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The dry reforming of shale gas (methane and ethane with an average ratio of 4 : 1) with carbon dioxide (DRS) is considered to be a promising way to produce syngas, which widens the utilization of shale gas and mitigates carbon dioxide emission. In this paper, Ce modified Ni‐based catalysts were developed and the corresponding catalytic performances for DRS were investigated with a fixed bed reactor. Results showed that the catalyst containing 5 wt% of Ni and 5 wt% of Ce performed a best catalytic effect, including the selectivity of syngas and the carbon resistance performance, which is due to the good metal dispersion, strong interaction between Ni and Ce, and the formation of Ni‐CeOx solid solution. The electron transfer between Ni and Ce, substitution of Ni for Ce, and the sequential oxygen vacancies or defects, play significant roles in activating CH4, C2H6 and CO2. The conversion of reactant gas increased with temperature, while the selectivity of syngas is little affected with temperature. In addition, the desired catalyst containing 5 wt% of Ni and 5 wt% of Ce showed good stability in the long‐time operation, which indicates that the Ce modified Ni‐based catalyst is a promising one for the dry reforming of shale gas.

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“…[220] CO 2 can also be employed as as oft oxidant in the oxidative dehydrogenation of n-butane to C4 olefins, [221] ethylbenzene to styrene [222] or dry-reformingo fe thane to syn gas and ethylene. [223] An Ni-based homogeneous catalyst showede xcellent catalytic activity for the synthesis of acrylate from CO 2 ,e thylene, andabase. [224] The use of Ni-based heterogeneousc atalysts for this reactionh as wide scope as the acrylates are the building blocks for al arge spectrum of organic polymers.…”

Section: Future Potentialmentioning

confidence: 99%

Supported Porous Nanomaterials as Efficient Heterogeneous Catalysts for CO₂ Fixation Reactions

Bhanja

Modak

Bhaumik

2018

Chemistry A European J

113

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CO is a major greenhouse gas responsible for global warming and can act as an abundant and inexpensive C1 source for enhancing the chain length/functionalization of a wide range of reactive organic molecules. It is moderately reactive, nontoxic and renewable. Thus, CO fixation reactions are important to meet the global challenges, that is, to mitigate the concentration of CO in the atmosphere through its fruitful utilization, which is of great interest from economic and environmental perspectives. Various metallic nanoparticles as well as metal oxides can be supported over high surface area porous materials and the resulting nanomaterial can act as heterogeneous and reusable solid catalyst for CO fixation reactions for the synthesis of a large number of fuels, natural products agrochemicals, and pharmaceutical compounds. Here we present an overview of the recent progress as well as promising future of metal/metal oxide nanoparticles supported over porous nanomaterials as heterogeneous catalysts for a wide spectrum of these CO fixation reactions.

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Reforming and oxidative dehydrogenation of ethane with CO2 as a soft oxidant over bimetallic catalysts

Cited by 133 publications

References 36 publications

The effects of bimetallic interactions for CO₂‐assisted oxidative dehydrogenation and dry reforming of propane

The effects of bimetallic interactions for CO₂‐assisted oxidative dehydrogenation and dry reforming of propane

Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al₂O₃ Catalyst: Syngas Production Enhanced over Ni‐CeO_x Formation

Supported Porous Nanomaterials as Efficient Heterogeneous Catalysts for CO₂ Fixation Reactions

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Reforming and oxidative dehydrogenation of ethane with CO2 as a soft oxidant over bimetallic catalysts

Cited by 133 publications

References 36 publications

The effects of bimetallic interactions for CO2‐assisted oxidative dehydrogenation and dry reforming of propane

The effects of bimetallic interactions for CO2‐assisted oxidative dehydrogenation and dry reforming of propane

Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al2O3 Catalyst: Syngas Production Enhanced over Ni‐CeOx Formation

Supported Porous Nanomaterials as Efficient Heterogeneous Catalysts for CO2 Fixation Reactions

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The effects of bimetallic interactions for CO₂‐assisted oxidative dehydrogenation and dry reforming of propane

The effects of bimetallic interactions for CO₂‐assisted oxidative dehydrogenation and dry reforming of propane

Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al₂O₃ Catalyst: Syngas Production Enhanced over Ni‐CeO_x Formation

Supported Porous Nanomaterials as Efficient Heterogeneous Catalysts for CO₂ Fixation Reactions