Direct Conversion of Syngas into Light Olefins over Zirconium-Doped Indium(III) Oxide and SAPO-34 Bifunctional Catalysts: Design of Oxide Component and Construction of Reaction Network

ChemCatChem ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 1536-1541 ◽  
Author(s):  
Junjie Su ◽  
Dong Wang ◽  
Yangdong Wang ◽  
Haibo Zhou ◽  
Chang Liu ◽  
...  
Keyword(s):  
Reaction Network ◽  
Direct Conversion ◽  
Light Olefins ◽  
Bifunctional Catalysts ◽  
Oxide Component

scholarly journals Coated sulfated zirconia/SAPO-34 for the direct conversion of CO2 to light olefins

2020 ◽  
Vol 10 (5) ◽  
pp. 1507-1517 ◽  
Author(s):  
Adrian Ramirez ◽  
Abhishek Dutta Chowdhury ◽  
Mustafa Caglayan ◽  
Alberto Rodriguez-Gomez ◽  
Nimer Wehbe ◽  
...  
Keyword(s):  
Carbon Cycle ◽  
Metal Oxides ◽  
Sulfated Zirconia ◽  
Fossil Fuel ◽  
Direct Conversion ◽  
Light Olefins ◽  
Bifunctional Catalysts

The conversion of CO2 to light olefins via bifunctional catalysts (i.e. metal oxides/zeolites) is a promising approach to tackle CO2 emissions and, at the same time, reduce fossil-fuel dependence by closing the carbon cycle.

A Mechanistic Study of Syngas to Light Olefins over OXZEO Bifunctional Catalysts: Insights into the Initial Carbon-Carbon Bond Formation on the Oxide

2022 ◽  
Author(s):  
Hongyu Chen ◽  
Zhengmao Liu ◽  
Na Li ◽  
Feng Jiao ◽  
Yuxiang Chen ◽  
...  
Keyword(s):  
Bond Formation ◽  
Direct Conversion ◽  
Bifunctional Catalyst ◽  
Light Olefins ◽  
Mechanistic Study ◽  
Bifunctional Catalysts ◽  
Reaction Intermediates ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Initial Carbon

Direct conversion of syngas into light olefins (C2=-C4=) using bifunctional catalyst composed of oxide and zeolite (OXZEO) has attracted extensive attention in both academia and industry. However, the reaction intermediates...

scholarly journals Utilization of SAPO-18 or SAPO-35 in the bifunctional catalyst for the direct conversion of syngas to light olefins

RSC Advances ◽  
2021 ◽  
Vol 11 (23) ◽  
pp. 13876-13884
Author(s):  
Yuxuan Huang ◽  
Hongfang Ma ◽  
Zhiqiang Xu ◽  
Weixin Qian ◽  
Haitao Zhang ◽  
...  
Keyword(s):  
Direct Conversion ◽  
Bifunctional Catalyst ◽  
Light Olefins

SAPO-18 and SAPO-35 were synthesized and utilized as the zeotype in the bifunctional catalyst for the STO process, respectively.

Heterogeneous catalysts for gas-phase conversion of ethylene to higher olefins

2018 ◽  
Vol 34 (5) ◽  
pp. 595-655 ◽  
Author(s):  
Mohammad Ghashghaee
Keyword(s):  
Gas Phase ◽  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Supply And Demand ◽  
Value Added ◽  
Direct Conversion ◽  
Operating Conditions ◽  
Light Olefins ◽  
Phase Conversion ◽  
Natural Gas Reservoirs

Abstract The reduced availability of propylene and C4 products from steam crackers continues to provoke on-purpose technologies for light olefins such that almost 30% of propylene in 2025 is predicted to be supplied from unconventional sources. Furthermore, the recent discoveries of natural gas reservoirs have urged interest in the conversion of surplus alkanes and alkenes, especially ethane and ethylene. The direct conversion of ethylene to propylene or a combination of value-added chemicals, including butylenes and oligomers in the range of gasoline and diesel fuel, provides the capability of responding to the fluctuations in the balance between supply and demand of the main petrochemicals. A comprehensive review of heterogeneous catalysts for the gas-phase conversion pathways is presented here in terms of catalytic performances (ethylene conversion and product selectivities), productivities, lifetimes, active sites, physicochemical properties, mechanisms, influence of operating conditions, deactivation and some unresolved/less-advanced aspects of the field. The addressed catalysts cover both zeolitic materials and transition metals, such as tungsten, molybdenum, rhenium and nickel. Efforts in both experimental and theoretical studies are taken into account. Aside from the potential fields of progress, the review reveals very promising performances for the emerging technologies to produce propylene, a mixture of propylene and butenes, or a liquid fuel from ethylene.

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>

Highly active ternary oxide ZrCeZnOx combined with SAPO-34 zeolite for direct conversion of syngas into light olefins

2020 ◽  
Author(s):  
Fanhui Meng ◽  
Xiaojing Li ◽  
Peng Zhang ◽  
Langlang Yang ◽  
Guinan Yang ◽  
...  
Keyword(s):  
Direct Conversion ◽  
Light Olefins ◽  
Ternary Oxide ◽  
Highly Active

scholarly journals Effect of Zeolite Topology and Reactor Configuration on the Direct Conversion of CO2 to Light Olefins and Aromatics

ACS Catalysis ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 6320-6334 ◽  
Author(s):  
Adrian Ramirez ◽  
Abhishek Dutta Chowdhury ◽  
Abhay Dokania ◽  
Pieter Cnudde ◽  
Mustafa Caglayan ◽  
...  
Keyword(s):  
Direct Conversion ◽  
Light Olefins ◽  
Reactor Configuration

Direct Conversion of Syngas into Light Olefins with Low CO2 Emission

ACS Catalysis ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 2046-2059 ◽  
Author(s):  
Sen Wang ◽  
Pengfei Wang ◽  
Dezhi Shi ◽  
Shipei He ◽  
Li Zhang ◽  
...  
Keyword(s):  
Co2 Emission ◽  
Direct Conversion ◽  
Light Olefins ◽  
Low Co2

Ru nanoparticles dispersed on magnetic yolk–shell nanoarchitectures with Fe3O4 core and sulfoacid-containing periodic mesoporous organosilica shell as bifunctional catalysts for direct conversion of cellulose to isosorbide

Nanoscale ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 2199-2206 ◽  
Author(s):  
Ying Yang ◽  
Wen Zhang ◽  
Feng Yang ◽  
Biao Zhou ◽  
Dehong Zeng ◽  
...  
Keyword(s):  
Direct Conversion ◽  
Bifunctional Catalysts ◽  
Periodic Mesoporous Organosilica ◽  
High Productivity ◽  
Ru Nanoparticles ◽  
Mesoporous Organosilica ◽  
Fe3o4 Core

High productivity of isosorbide was achieved using novel magnetic Ru–SO3H nanoreactors as bifunctional catalysts.

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