CO2-assisted propane dehydrogenation over of zirconia-titania catalysts: Effect of the carbon dioxide to propane ratios on olefin yields

Al-Shafei, Emad N.; Brown, David R.; Katikaneni, Sai P.; Al‐Badairy, H.; Muraza, Oki

doi:10.1016/j.jece.2020.104989

Cited by 11 publications

(11 citation statements)

References 30 publications

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“…The data were processed with the ANALYTIC 3 software package (Chromatec, Yangebup, Australia). The propane conversion (X) and selectivity to certain product i (S i ) were calculated according to Eqns ( 9) and (10). The selectivity values were normalized to make the sum of the selectivities of propylene, ethane, ethylene and methane to be 100%.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…2,5,6,8,9 Carbon dioxide (CO 2 ) plays an important role in the direct oxidation of propane into propylene and also in the reverse water-gas shift reaction [Eqn (2)], and this shifts the equilibrium towards the formation of propene because of removing H 2 from the reaction mixture. 5,6,10,11 Thus, CO 2 acts as a mild oxidant in this reaction and makes the reaction thermodynamically favorable. 12 An additional advantage of using CO 2 is the formation of carbon monoxide (CO) as a by-product of the reaction that can be used in the Fischer-Tropsch synthesis or hydroformylation reaction.…”

Section: Introductionmentioning

confidence: 99%

“…The catalytic dehydrogenation of propane into propylene in the presence of CO 2 [Eqn (1)] is an alternative method for high‐yield propylene production 2,5,6,8,9 . Carbon dioxide (CO 2 ) plays an important role in the direct oxidation of propane into propylene and also in the reverse water‐gas shift reaction [Eqn (2)], and this shifts the equilibrium towards the formation of propene because of removing H 2 from the reaction mixture 5,6,10,11 . Thus, CO 2 acts as a mild oxidant in this reaction and makes the reaction thermodynamically favorable 12 .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Mashkin

Tedeeva

Fedorova

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND Propane dehydrogenation is an alternative way both to produce propylene and to utilize CO2. Because of the high oxygen mobility in cerium‐zirconium oxide (CexZr1‐xO2), it looks promising as a support for the chromium oxide catalysts of propane dehydrogenation with CO2. Supports of CexZr1‐xO2 on mesoporous silica were synthesized in this work to combine the high oxygen mobility of the former and the pore structure of the latter. RESULTS Two applied synthetic approaches resulted in materials with different structure and properties. The wet impregnated catalysts demonstrated a higher activity and selectivity to propylene. At the same time, they had larger pore size distribution maxima (~9 nm) than the samples prepared by the introduction of metals simultaneously with Si‐precursor hydrolysis (~2 nm). For the chromium catalysts with the same support, the catalytic activity decreased with varying chromium loading as follows: 5% Cr > 3% Cr ≈ 7% Cr. For the catalysts with different CexZr1‐xO2 supports and equal chromium loading, the activity decreased with x changing as follows: 0.5 > 0.6 > 0.8 for the samples prepared by wet impregnation, and 0.8 ≈ 0.6 > 0.5 for the other synthetic path. CONCLUSIONS Catalysts were tested in oxidative dehydrogenation of propane with CO2. The wet impregnation approach turned out to be much more promising in terms of catalytic activity and selectivity to propylene in the reaction of propane dehydrogenation with CO2. The selectivity achieved was ≤80% at a 40% conversion. © 2023 Society of Chemical Industry (SCI).

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Section: Materials Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Mashkin

Tedeeva

Fedorova

et al. 2023

J of Chemical Tech & Biotech

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“…Even the RWGS reaction is thermodynamically limited, it is a way to proceed under the conditions of the PDH (500-600 °C), which can shift the equilibrium to produce more C 3 H 6 [161][162][163]. Cao et al demonstrated that the promotion of CO 2 on the yield of propylene was attributed to the promotion of simple dehydrogenation by coupling with the In-based catalysts for RWGS reaction [132,133].…”

Section: Promote Rwgs Reactionmentioning

confidence: 99%

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

Wang

et al. 2022

Rare Met.

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CO 2 -assisted oxidative dehydrogenation of propane (CO 2 -ODHP) is an attractive strategy to offset the demand gap of propylene due to its potentiality of reducing CO 2 emissions, especially under the demands of peaking CO 2 emissions and carbon neutrality. The introduction of CO 2 as a soft oxidant into the reaction not only averts the over-oxidation of products, but also maintains the high oxidation state of the redox-active sites. Furthermore, the presence of CO 2 increases the conversion of propane by coupling the dehydrogenation of propane (DHP) with the reverse water gas reaction (RWGS) and inhibits the coking formation to prolong the lifetime of catalysts via the reverse Boudouard reaction. An effective catalyst should selectively activate the C-H bond but suppress the C-C cleavage. However, to prepare such a catalyst remains challenging. Chromium-based catalysts are always applied in industrial application of DHP; however, their toxic properties are harmful to the environment. In this aspect, exploring environment-friendly and sustainable catalytic systems with Cr-free is an important issue. In this review, we outline the development of the CO 2 -ODHP especially in the last ten years, including the structural information, catalytic performances, and mechanisms of chromium-free metal-based catalyst systems, and the role of CO 2 in the reaction. We also present perspectives for future progress in the CO 2 -ODHP.

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“…Previously, oxygen was widely employed for ODH, but due to its strong oxidizability, deep oxidation of C 2 H 6 to CO 2 could hardly be avoided. Therefore, CO 2 , a milder oxidant, was proposed to afford a novel CO 2 ‐ODH process, which showed great promise for the conversion of lower alkanes (mainly C 2 H 6 and C 3 H 8 ) to the corresponding alkenes [5,6] . At the same time, the CO 2 ‐ODH process can also be regarded as a potential strategy of CO 2 utilization that does not need H 2 production in particular, which is very interesting in a carbon neutrality scenario.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Structure‐Performance Relationship, and Reaction Network of ZnZSM‐5 for Oxidative Dehydrogenation of Ethane with CO₂

Liu

Zhang

Wang

et al. 2023

Chemistry A European J

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Ethylene (C2H4) is a major chemical for the modern society, and new technologies for its production are of strategic importance globally. Recently, oxidative dehydrogenation of ethane (C2H6) using CO2 as a milder oxidant (CO2‐ODH) is proposed as a potential way for C2H4 production, and development of effective catalysts for the process is drawing wide attention. Here, we report on a facilely prepared ZSM‐5 supported Zn system, i. e., ZnZSM‐5, which showed great promise in CO2‐ODH. Samples with different Zn loadings were prepared and evaluated, and the highest performance was obtained over 0.05ZnZSM‐5 at 700 °C and a CO2:C2H6 feeding ratio of 5 : 1. During 340 min TOS, the C2H6 conversion decreased moderately from 36.2 % to 23.1 %, and the C2H4 yield stabilized at 21.9 % to 27.9 %. Based on systematic characterization and investigation of reaction conditions, the structure‐performance relationship and reaction network were discussed in detail.

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CO2-assisted propane dehydrogenation over of zirconia-titania catalysts: Effect of the carbon dioxide to propane ratios on olefin yields

Cited by 11 publications

References 30 publications

Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

Preparation, Structure‐Performance Relationship, and Reaction Network of ZnZSM‐5 for Oxidative Dehydrogenation of Ethane with CO₂

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CO2-assisted propane dehydrogenation over of zirconia-titania catalysts: Effect of the carbon dioxide to propane ratios on olefin yields

Cited by 11 publications

References 30 publications

Synthesis of CexZr1‐xO2/SiO2 supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Synthesis of CexZr1‐xO2/SiO2 supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

Preparation, Structure‐Performance Relationship, and Reaction Network of ZnZSM‐5 for Oxidative Dehydrogenation of Ethane with CO2

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Product

Resources

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Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Synthesis of Ce_xZr_1‐xO₂/SiO₂ supports for chromium oxide catalysts of oxidative dehydrogenation of propane with carbon dioxide

Preparation, Structure‐Performance Relationship, and Reaction Network of ZnZSM‐5 for Oxidative Dehydrogenation of Ethane with CO₂