CO2 Assisted Oxidative Dehydrogenation of Propane to Propylene over Fluidizable MoO3/La2O3-γAl2O3 Catalysts

Balogun, Majid L.; Adamu, Sagir; Bakare, Idris A.; Ba-Shammakh, M.; Hossain, Mohammad M.

doi:10.1016/j.jcou.2020.101329

Cited by 35 publications

(12 citation statements)

References 94 publications

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“…Meanwhile, the molybdenum oxide species were recovered and the by-product of water was formed [29]. Hossain et al [149]. In short, the special redox properties of Mobased catalysts are conducive to the proceeding of the CO 2 -ODHP, implying they possess potential application in the reaction.…”

Section: Other Catalystsmentioning

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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Section: Other Catalystsmentioning

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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“…Propylene (C 3 H 6 ) is one of the most important olefins primarily because it can be utilized for the manufacture of polypropylene, the world’s second-most widely produced synthetic plastic. In the past years, the global demand for C 3 H 6 has been continuously increasing, and the production is projected to be 160 million metric tons by 2030 . C 3 H 6 is generally derived from the thermal cracking of hydrocarbons where propane (C 3 H 8 ) emerges as a byproduct, necessitating the follow-up separation process to produce polymer-grade C 3 H 6 (99.5%) that can meet the criterion for downstream processing.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Development of Metal–Organic Frameworks for Propylene and Propane Separation

Ding

Zhang

2022

Energy Fuels

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Separation of propylene (C3H6) and propane (C3H8) is a vital step for the manufacture of high-purity C3H6 as an important energy source and critical raw material in the petrochemical industry. Due to their similar sizes and properties, the separation of C3H6 and C3H6 is challenging and currently relies on energy-intensive cryogenic distillation. Metal–organic framework (MOF)-assisted adsorptive separation and membrane-based separation are revolutionary energy-saving technologies that can enable efficient gas purification under mild conditions. This review presents the current progress in C3H6/C3H8 separation achieved with MOFs and MOF-based membranes. The different separation mechanisms (including equilibrium separation, kinetic separation, gate-opening effect, molecular sieving, and combination of them) along with the materials design principles that contribute to benchmark C3H6/C3H8 separation are discussed. Diverse creative strategies for the fabrication of high-quality MOF membranes (both continuous membranes and mixed-matrix membranes) to surpass the tradeoff between selectivity and gas permeability are summarized. Lastly, this review also outlines the major challenges and opportunities of MOFs to be used for practical C3H6/C3H8 separation.

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“…Thus far, the most effective catalysts reported for one-step CO 2 -ODHP via a Mars–van Krevelen (MvK) redox mechanism involving the lattice oxygen principally focus on the supported metal oxides (e.g., CrO x , Ga 2 O 3 , Fe 2 O 3 , MoO 3 , and In 2 O 3 ) and solid solutions (e.g., Zn-Zr and Ce-Zr) owing to the presence of multivalence states and oxygen storage/release capacity, respectively. − When the mechanism of the two-step coupling process is taken into account to design a catalyst, the active component toward CO 2 adsorption and activation should be introduced, generally referring to those metallic catalysts composed of both precious (Ru, Pt, and Pd) and nonprecious metals (Fe, Co, or Ni). ,,,− These metallic active sites, however, could concurrently promote the activation and cleavage of C–C bonds in propane in addition to the activation of CO bonds in CO 2 , resulting in coke deposition and a low yield of propylene due to the underlying side reactions of DRP, deep dehydrogenation, and cracking. Thus, it is of paramount importance to explore new catalytically active substances enabling the selective activation of C–H and CO bonds together with the inhibited cleavage of C–C bonds.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Role of Fe Doping in Tuning the Size and Dispersion of GaN Nanocrystallites for CO₂-Assisted Oxidative Dehydrogenation of Propane

Wang

Yang

et al. 2022

ACS Catal.

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The Fe-doped silicalite-1 zeolite as a matrix was employed to implant GaN nanocrystallites via a combined wet impregnation with in situ nitridation method. Direct spectroscopic evidences under a vacuum unraveled that the incorporation of the isolated framework Fe atoms could cause the generation of more interior silanols and especially hydrogen-bonded groups of silanol nests, where the solvated Ga3+ ions and urea in an N2 atmosphere at high temperatures were transformed into the highly dispersed GaN nanocrystallites that were embedded simultaneously in defects of the Fe-silicalite-1 matrix with the binding structure of Si–O–GaN. Moreover, the particle size distribution of GaN can be tuned from the nanoscale (14.6 ± 3.5 nm) to sub-nanoscale (2.7 ± 0.4 nm) by regulating the molar ratio of Si/Fe. Combining the results of the temperature-programmed surface reaction (TPSR) with the measurements of temperature-programmed desorption and mass spectra (TPD-MS) using the probe molecules of C3H8 and CO2, it was proposed that isolated framework Fe species were active sites for the catalytic conversion of CO2, while the nanostructured GaN was responsible for the adsorption and activation of C3H8. Catalytic results and kinetics show that the CO2-assisted oxidative dehydrogenation of propane (CO2-ODHP) over GaN/Fe-silicalite-1 proceeds by following a two-step coupling process (direct dehydrogenation of propane (DDP) + reverse water gas shift (RWGS)) and also is a structure-sensitive reaction characterized by the dependence of GaN particle size on the specific catalytic activity and apparent activation energy of converting C3H8 and CO2. Without the occurrence of GaN sintering, the slight loss of catalytic activity caused by coke deposition was confirmed by linearly correlating the normalized amount of coke with the deactivation rate.

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CO2 Assisted Oxidative Dehydrogenation of Propane to Propylene over Fluidizable MoO3/La2O3-γAl2O3 Catalysts

Cited by 35 publications

References 94 publications

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

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

Recent Advances in the Development of Metal–Organic Frameworks for Propylene and Propane Separation

Understanding the Role of Fe Doping in Tuning the Size and Dispersion of GaN Nanocrystallites for CO₂-Assisted Oxidative Dehydrogenation of Propane

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CO2 Assisted Oxidative Dehydrogenation of Propane to Propylene over Fluidizable MoO3/La2O3-γAl2O3 Catalysts

Cited by 35 publications

References 94 publications

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

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

Recent Advances in the Development of Metal–Organic Frameworks for Propylene and Propane Separation

Understanding the Role of Fe Doping in Tuning the Size and Dispersion of GaN Nanocrystallites for CO2-Assisted Oxidative Dehydrogenation of Propane

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Understanding the Role of Fe Doping in Tuning the Size and Dispersion of GaN Nanocrystallites for CO₂-Assisted Oxidative Dehydrogenation of Propane