Light-Alkane Oxidative Dehydrogenation to Light Olefins over Platinum-Based SAPO-34 Zeolite-Supported Catalyst

2012 ◽  
Vol 52 (1) ◽  
pp. 346-352 ◽  
Author(s):  
Zeeshan Nawaz ◽  
Fei Wei
Keyword(s):  
Oxidative Dehydrogenation ◽  
Supported Catalyst ◽  
Light Olefins ◽  
Light Alkane

Metal-based catalysts for the non-oxidative dehydrogenation of light alkanes to light olefins

2021 ◽  
Vol 6 (1) ◽  
pp. 9-26
Author(s):  
Sibao Liu ◽  
Bofeng Zhang ◽  
Guozhu Liu
Keyword(s):  
Oxidative Dehydrogenation ◽  
Bimetallic Catalysts ◽  
Light Olefins ◽  
Light Alkanes

This review provides an overview of metal-based catalysts, including Pt-, Pd-, Rh- and Ni-based bimetallic catalysts for non-oxidative dehydrogenation of light alkanes to olefins.

scholarly journals Progress in the oxidative dehydrogenation of light alkanes to light olefins on metal-free catalysts

2020 ◽  
Vol 50 (7) ◽  
pp. 832-846 ◽  
Author(s):  
Bin Qiu ◽  
Dongqi Wang ◽  
An-Hui Lu* ◽  
Jian Sheng ◽  
Bing Yan
Keyword(s):  
Oxidative Dehydrogenation ◽  
Light Olefins ◽  
Light Alkanes ◽  
Metal Free

scholarly journals First Principles Micro-kinetic Model of Catalytic Non-oxidative Dehydrogenation of Ethane over Close-packed Metallic Facets

2019 ◽  
Author(s):  
Martin Hangaard Hansen ◽  
Jens K. Nørskov ◽  
Thomas Bligaard
Keyword(s):  
Kinetic Model ◽  
Oxidative Dehydrogenation ◽  
Reaction Network ◽  
Building Blocks ◽  
Light Olefins ◽  
Catalytic Dehydrogenation ◽  
Reaction Conditions ◽  
Model Code ◽  
Ethane Dehydrogenation ◽  
Oxidative Dehydrogenation Of Ethane

<div> <div> <p>Catalytic dehydrogenation of light alkanes may other more efficient routes to selectively producing light olefins, which are some of the most important chemical building blocks in the industry, in terms of scale. We present a descriptor based micro-kinetic model of the trends in selectivity and activity of non-oxidative dehydrogenation of ethane over close-packed metal facets and through varied reaction conditions. Our model predicts and explains the experimentally observed promotion effect on turnover rate from co-feeding hydrogen as an effect of the shifting equilibria in steady state. At low conversion reaction conditions over Pt, the path to ethene goes through ethane dehydrogenation to ethyl, CH 3 CH 2 *, then to ethene while the non-selective pathway to methane and deeply dehydrogenated species is predicted to go through dehydrogenation via CH 3 CH*. This implies that the desorption step of ethene is not the limiting step for selectivity and that geometric effects that stabilize CH 2 CH 2 * compared to CH 3 CH* are desirable properties of a better catalyst. Removing reactive bridge and 3-fold sites facilitates this, which may be achievable by sufficient concentrations of tin in platinum. The included model code furthermore provides a base for easy tuning and for expanding the study to other thermodynamic conditions, other facets, alloys or the reaction network to longer hydrocarbons or to oxidative pathways.</p> </div> </div>

Vanadium-Node-Functionalized UiO-66: A Thermally Stable MOF-Supported Catalyst for the Gas-Phase Oxidative Dehydrogenation of Cyclohexene

ACS Catalysis ◽  
2014 ◽  
Vol 4 (8) ◽  
pp. 2496-2500 ◽  
Author(s):  
Huong Giang T. Nguyen ◽  
Neil M. Schweitzer ◽  
Chih-Yi Chang ◽  
Tasha L. Drake ◽  
Monica C. So ◽  
...  
Keyword(s):  
Gas Phase ◽  
Oxidative Dehydrogenation ◽  
Supported Catalyst ◽  
Thermally Stable

Oxidative dehydrogenation of propane on the VO x /CeZrO/Al2O3 supported catalyst

2017 ◽  
Vol 91 (5) ◽  
pp. 814-821 ◽  
Author(s):  
A. O. Turakulova ◽  
A. N. Kharlanov ◽  
A. V. Levanov ◽  
V. V. Lunin
Keyword(s):  
Oxidative Dehydrogenation ◽  
Supported Catalyst ◽  
Oxidative Dehydrogenation Of Propane

scholarly journals Near 100% ethene selectivity achieved by tailoring dual active sites to isolate dehydrogenation and oxidation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chaojie Wang ◽  
Bing Yang ◽  
Qingqing Gu ◽  
Yujia Han ◽  
Ming Tian ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Selective Oxidation ◽  
Active Sites ◽  
Three Dimensional ◽  
Acid Sites ◽  
Deep Oxidation ◽  
Oxidation Catalysis ◽  
Catalytic Dehydrogenation ◽  
Light Alkane ◽  
Oxidation Of Hydrogen

AbstractProhibiting deep oxidation remains a challenging task in oxidative dehydrogenation of light alkane since the targeted alkene is more reactive than parent substrate. Here we tailor dual active sites to isolate dehydrogenation and oxidation instead of homogeneously active sites responsible for these two steps leading to consecutive oxidation of alkene. The introduction of HY zeolite with acid sites, three-dimensional pore structure and supercages gives rise to Ni2+ Lewis acid sites (LAS) and NiO nanoclusters confined in framework wherein catalytic dehydrogenation of ethane occurs on Ni2+ LAS resulting in the formation of ethene and hydrogen while NiO nanoclusters with decreased oxygen reactivity are responsible for selective oxidation of hydrogen rather than over-oxidizing ethene. Such tailored strategy achieves near 100% ethene selectivity and constitutes a promising basis for highly selective oxidation catalysis beyond oxidative dehydrogenation of light alkane.

scholarly journals Structured Monolithic Catalysts vs. Fixed Bed for the Oxidative Dehydrogenation of Propane

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 884
Author(s):  
Ilenia Rossetti ◽  
Elnaz Bahadori ◽  
Antonio Tripodi ◽  
Gianguido Ramis
Keyword(s):  
Oxidative Dehydrogenation ◽  
Catalyst Activity ◽  
Sol Gel ◽  
Fixed Bed ◽  
Supported Catalyst ◽  
Dip Coating ◽  
Catalyst Loading ◽  
Oxidative Dehydrogenation Of Propane ◽  
Structured Reactor ◽  
Order Of Magnitude

The deposition of V-based catalysts for the oxidative dehydrogenation of propane to propene on cordierite honeycomb monoliths was optimised as a strategy to decrease the contact time in a structured reactor with respect to a conventional fixed bed one. 10 wt% VOx supported over SiO2 or Al2O3 were used as catalysts, deposed over the monolith using silica or alumina as primer, respectively. Both the alumina supported catalyst and the bohemite primer precursor were effectively deposed by dip-coating from stable powder suspensions, whereas insufficient adhesion was obtained when loading pre-synthesised SiO2 over the cordierite. A new method based on sol-gel production of SiO2 from tetraethylortosilicate (TEOS) over the monolith surface was set up. A correlation was derived for the prevision of the amount of silica deposed depending on the amount of TEOS. Both primer and catalyst loading were optimised as for uniformity and stability of the coating and resulted 0.5–1 wt % primer and 0.15 wt % of catalyst. Activity testing confirmed the strong improvement of propene productivity by increasing the time factor (i.e. Ncm3 of flowing reactant/min gcat), which ended in a one order of magnitude increase of productivity for the honeycomb-supported samples with respect to the fixed bed configuration.

scholarly journals First Principles Micro-kinetic Model of Catalytic Non-oxidative Dehydrogenation of Ethane over Close-packed Metallic Facets

2019 ◽  
Author(s):  
Martin Hangaard Hansen ◽  
Jens K. Nørskov ◽  
Thomas Bligaard
Keyword(s):  
Kinetic Model ◽  
Oxidative Dehydrogenation ◽  
Reaction Network ◽  
Building Blocks ◽  
Light Olefins ◽  
Catalytic Dehydrogenation ◽  
Reaction Conditions ◽  
Model Code ◽  
Ethane Dehydrogenation ◽  
Oxidative Dehydrogenation Of Ethane

<div> <div> <p>Catalytic dehydrogenation of light alkanes may other more efficient routes to selectively producing light olefins, which are some of the most important chemical building blocks in the industry, in terms of scale. We present a descriptor based micro-kinetic model of the trends in selectivity and activity of non-oxidative dehydrogenation of ethane over close-packed metal facets and through varied reaction conditions. Our model predicts and explains the experimentally observed promotion effect on turnover rate from co-feeding hydrogen as an effect of the shifting equilibria in steady state. At low conversion reaction conditions over Pt, the path to ethene goes through ethane dehydrogenation to ethyl, CH 3 CH 2 *, then to ethene while the non-selective pathway to methane and deeply dehydrogenated species is predicted to go through dehydrogenation via CH 3 CH*. This implies that the desorption step of ethene is not the limiting step for selectivity and that geometric effects that stabilize CH 2 CH 2 * compared to CH 3 CH* are desirable properties of a better catalyst. Removing reactive bridge and 3-fold sites facilitates this, which may be achievable by sufficient concentrations of tin in platinum. The included model code furthermore provides a base for easy tuning and for expanding the study to other thermodynamic conditions, other facets, alloys or the reaction network to longer hydrocarbons or to oxidative pathways.</p> </div> </div>

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