Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(18), P. 7994 - 8044

Published: Jan. 1, 2022

Light olefins are important feedstocks and platform molecules for the chemical industry. Their synthesis has been a research priority in both academia There many different approaches to of these compounds, which differ by choice raw materials, catalysts reaction conditions. The goals this review highlight most recent trends light olefin perform comparative analysis synthetic routes using several quantitative characteristics: selectivity, productivity, severity operating conditions, stability, technological maturity sustainability. Traditionally, on an industrial scale, cracking oil fractions used produce olefins. Methanol-to-olefins, alkane direct or oxidative dehydrogenation technologies have great potential short term already reached scientific maturities. Major progress should be made field methanol-mediated CO CO2 hydrogenation electrocatalytic reduction is very attractive process long run due low temperature possible use sustainable electricity. application modern concepts such as electricity-driven intensification, looping, management nanoscale catalyst design lead near future more environmentally friendly, energy efficient selective large-scale synthesis.

Language: Английский

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Cr-doping regulates Mn3O4 spinel structure for efficient total oxidation of propane: Structural effects and reaction mechanism determination

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 328, P. 122528 - 122528

Published: Feb. 24, 2023

Language: Английский

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Promoting Propane Dehydrogenation with CO₂ over the PtFe Bimetallic Catalyst by Eliminating the Non-selective Fe(0) Phase

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(11), P. 6559 - 6569

Published: May 18, 2022

Fine tuning the structure of bimetallic nanoparticles is critical toward understanding structure–activity relationships and further improving catalytic performance in propane dehydrogenation (PDH). Excessive Fe species PtFe catalysts promote carbon deposition leading to low propylene selectivity, it remains challenging synthesize well-defined while selectively eliminating excessive Fe. Herein, we show that formation coke can be significantly inhibited by introducing CO2 into PDH over catalysts, where effectively eliminates active Fe(0) coking sites without changing surface alloy. With a CO2/C3H8 feeding ratio 0.20, Pt1Fe7/S-1 catalyst shows highest production rate decreased amount from 18.8 1.0 wt % compared with CO2. X-ray absorption spectroscopy, photoelectron 57Fe Mössbauer results indicate oxidation unalloyed during CO2-PDH reaction, instead reverse Boudouard reaction (CO2 + C = 2CO), inhibits deposition. This work provides promising strategy for under conditions reaction.

Language: Английский

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

Rare Metals, Journal Year: 2022, Volume and Issue: 41(7), P. 2129 - 2152

Published: March 11, 2022

Language: Английский

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Elucidating the promoting advantages and fundamentals for their creation in Sn-modified commercial CrOx/Al2O3 catalyst for propane dehydrogenation

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149366 - 149366

Published: Feb. 5, 2024

Language: Английский

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Photothermal catalytic CO2 oxidative dehydrogenation of propane over Co-Mn bimetallic oxides supported on MCM-41 molecular sieve

Molecular Catalysis, Journal Year: 2024, Volume and Issue: 559, P. 114070 - 114070

Published: March 26, 2024

Language: Английский

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Effects of Support and CO₂ on the Performances of Vanadium Oxide-Based Catalysts in Propane Dehydrogenation

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(10), P. 5736 - 5749

Published: April 28, 2022

Vanadium oxide-based catalysts are promising candidates for propane dehydrogenation (PDH) with and without CO2 introduction. In the present study, effects of support on intrinsic activity VOx-based were systematically investigated by a combination experimental theoretical calculations. The VOx was found to vary significantly oxide supports, among which ZrO2-supported is 4 times higher than that other samples, can serve as highly active stable at H2/C3H8 ratio 0.5. experiments established scaling relationships based density functional theory calculations reveal chemical states bridge oxygen in V–O bond play critical roles activation under reductive condition, weaker VOx–support interactions result lower electron thus contributing C–H rupture capability VOx/ZrO2. Relatively apparent energies PDH atmosphere observed all samples. However, whether promotional effect could be experimentally depend largely coking behaviors because H2 lean conditions caused would lead faster deactivation polymerization degree stronger acidity. basic principles study will help further tune micro-environment site high-performance CO2-PDH reactions.

Language: Английский

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Main-Group Catalysts with Atomically Dispersed In Sites for Highly Efficient Oxidative Dehydrogenation

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(37), P. 16855 - 16865

Published: Aug. 25, 2022

Transition metal oxides are well-known catalysts for oxidative dehydrogenation thanks to their excellent ability activate alkanes. However, they suffer from an inferior alkene yield due the trade-off between conversion and selectivity induced by more reactive alkenes than alkanes, which obscures optimization of catalysts. Herein, we attempt overcome this challenge activating a selective main-group indium oxide considered be inactive in conventional wisdom. Atomically dispersed In sites with local structure [InOH]2+ anchored substituting protons supercages HY enclosed active centers that enable activation ethane metal-normalized turnover number almost one magnitude higher those supported In2O3 counterparts. Furthermore, isolated could stabilized situ formed H2O oxidation hydrogen nanoparticles. As result, as-designed exhibit 80% ethene at conversion, thus achieving 60% nanoparticles, outperforming state-of-the-art transition This study unlocks new opportunities utilization elements pave way toward rational design highly efficient catalysis.

Language: Английский

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Dehydrogenation of propane in the presence of CO2 over GaN/SiO2 catalysts: Relationship between the type of SiO2 and the activity

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 433, P. 134443 - 134443

Published: Jan. 3, 2022

Language: Английский

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Molecular-level investigation on supported CrOx catalyst for oxidative dehydrogenation of propane with carbon dioxide

Journal of Catalysis, Journal Year: 2022, Volume and Issue: 409, P. 87 - 97

Published: April 6, 2022

Language: Английский

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