Oxidative dehydrogenation of propane to propylene with carbon dioxide

Atanga, Marktus A.; Rezaei, Fateme; Jawad, Abbas; Fitch, Mark W.; Rownaghi, Ali A.

doi:10.1016/j.apcatb.2017.08.052

Cited by 216 publications

(225 citation statements)

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“…Among other systems are zeolite materials with some interesting properties such as good thermal stability, high surface area, and ease of synthesis and modification. A few studies in recent years have focused on the ODH of alkanes using different zeolite materials [20][21][22]. In one of the most recent studies, the role of gallium in ODH of a short chain alkane was investigated [23].…”

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confidence: 99%

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

2020

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Non-coking stable alkaline earth metal (M = Mg, Sr, and Ba) modified Ga-NaY catalysts were prepared by ionic-exchange and tested in oxidative dehydrogenation (ODH) of n-octane using air as the source of oxygen. The role of the alkaline earth metals in NaY was to poison the acid sites while enhancing the basic sites responsible for ODH. The exception was the calcium modified NaY, which was more acidic than the parent NaY, coking and unstable under the ODH conditions used in this study. The role of gallium was to enhance the dehydrogenation pathway and improve the stability of NaY. The sequence of increasing selectivity to octenes followed the order: CaGa-NaY < Ga-NaY< MgGa-NaY < SrGa-NaY < BaGa-NaY. The highest octene selectivity obtained was 37% at iso-conversion of 6 ± 1% when BaGa-NaY was used at a temperature of 450 °C. The activity of the catalysts was directly proportional to the reducibility of the catalysts, which is in agreement with expectations.

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Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

2020

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“…At present the CO 2 ‐ODHP efforts focus primarily on chromium‐based catalysts supported on zeolites, mesoporous silica, and metal oxides . The activation of CO 2 for chromium‐based catalysts is typically attributed to a Cr 6+ active center generated from a redox cycle with Cr 3+ .…”

Section: Introductionmentioning

confidence: 99%

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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“…In recent years, considerable research efforts have been focused on the oxidative dehydrogenation of propane to propylene . Propylene is an important chemical feedstock that is in demand mainly for the production of polypropylene, acrylic acid acrylonitrile, and iso‐propanol.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and evaluation of high selectivity mixed molybdenum and vanadium oxide catalysts for oxidative dehydrogenation of propane

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Molybdenum and vanadium oxide catalysts with varied compositions (Mo/V ¼ 1/1, 7/3, 8/2, and 9/1) were prepared using a modified citratenitrate auto-combustion method for the oxidative dehydrogenation of propane to propylene. These catalysts were characterized by BET-technique, TPR, XRD, SEM, Raman, and UV spectroscopy. The effects of washing and supercritical CO 2 drying on catalysts during the preparation steps were investigated. Results show an interaction between the molybdenum and vanadium metal ions in all of these catalysts due to the presence of a peak at 785 cm À1 from the Raman study, which was assigned to a polymolybdovanadate species V-O-Mo vibration. This interaction could be efficient for alkane activation reaction. The catalysts were evaluated in a fixed bed micro-reactor at temperatures in the range of 350-600 8C and at atmospheric pressure. The activity of the catalyst increased by increasing the molybdenum content. All of the catalysts in this study showed 100 % selectivity for propylene in the temperature range of 350-450 8C; however, the propylene selectivity was found to decrease with an increase in the temperature. The highest yield of 4.8 % with 100 % propylene selectivity was obtained for a catalyst with Mo/V ratio of 9:1 at 500 8C.

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Oxidative dehydrogenation of propane to propylene with carbon dioxide

Cited by 216 publications

References 142 publications

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

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

Synthesis, characterization, and evaluation of high selectivity mixed molybdenum and vanadium oxide catalysts for oxidative dehydrogenation of propane

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Oxidative dehydrogenation of propane to propylene with carbon dioxide

Cited by 216 publications

References 142 publications

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

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

Synthesis, characterization, and evaluation of high selectivity mixed molybdenum and vanadium oxide catalysts for oxidative dehydrogenation of propane

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