Hydrothermal preparation of Fe–Zr catalysts for the direct conversion of syngas to light olefins

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 34204-34211 ◽  
Author(s):  
Ning Chen ◽  
Jianli Zhang ◽  
Qingxiang Ma ◽  
Subing Fan ◽  
Tian-Sheng Zhao
Keyword(s):  
Co Hydrogenation ◽  
Direct Conversion ◽  
Product Distribution ◽  
Light Olefins ◽  
Hydrothermal Preparation ◽  
Heavy Hydrocarbons ◽  
Olefin Selectivity

Two-step hydrothermal preparation of Fe/Zr–K catalysts could improve the olefin selectivity and product distribution by reducing the secondary hydrogenation ability and suppressing the formation of heavy hydrocarbons during CO hydrogenation.

scholarly journals Fischer–Tropsch Synthesis for Light Olefins from Syngas: A Review of Catalyst Development

Reactions ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 227-257
Author(s):  
Arash Yahyazadeh ◽  
Ajay K. Dalai ◽  
Wenping Ma ◽  
Lifeng Zhang
Keyword(s):  
Pore Size ◽  
Crystal Size ◽  
Tropsch Synthesis ◽  
Light Olefins ◽  
Face Centered Cubic ◽  
Fischer Tropsch ◽  
Light Olefin ◽  
Structure Transition ◽  
Fischer Tropsch Synthesis ◽  
Olefin Selectivity

Light olefins as one the most important building blocks in chemical industry can be produced via Fischer–Tropsch synthesis (FTS) from syngas. FT synthesis conducted at high temperature would lead to light paraffins, carbon dioxide, methane, and C5+ longer chain hydrocarbons. The present work focuses on providing a critical review on the light olefin production using Fischer–Tropsch synthesis. The effects of metals, promoters and supports as the most influential parameters on the catalytic performance of catalysts are discussed meticulously. Fe and Co as the main active metals in FT catalysts are investigated in terms of pore size, crystal size, and crystal phase for obtaining desirable light olefin selectivity. Larger pore size of Fe-based catalysts is suggested to increase olefin selectivity via suppressing 1-olefin readsorption and secondary reactions. Iron carbide as the most probable phase of Fe-based catalysts is proposed for light olefin generation via FTS. Smaller crystal size of Co active metal leads to higher olefin selectivity. Hexagonal close-packed (HCP) structure of Co has higher FTS activity than face-centered cubic (FCC) structure. Transition from Co to Co3C is mainly proposed for formation of light olefins over Co-based catalysts. Moreover, various catalysts’ deactivation routes are reviewed. Additionally, techno-economic assessment of FTS plants in terms of different costs including capital expenditure and minimum fuel selling price are presented based on the most recent literature. Finally, the potential for global environmental impacts associated with FTS plants including atmospheric and toxicological impacts is considered via lifecycle assessment (LCA).

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.

Hydrogenation of CO2 to light olefins on CuZnZr@(Zn-)SAPO-34 catalysts: Strategy for product distribution

Fuel ◽  
2019 ◽  
Vol 239 ◽  
pp. 44-52 ◽  
Author(s):  
Jingyu Chen ◽  
Xu Wang ◽  
Dakai Wu ◽  
Jianli Zhang ◽  
Qingxiang Ma ◽  
...  
Keyword(s):  
Product Distribution ◽  
Light Olefins ◽  
Hydrogenation Of Co2

Effect of preparation of Fe–Zr–K catalyst on the product distribution of CO2 hydrogenation

RSC Advances ◽  
2015 ◽  
Vol 5 (98) ◽  
pp. 80196-80202 ◽  
Author(s):  
Xiaojuan Su ◽  
Jianli Zhang ◽  
Subing Fan ◽  
Qingxiang Ma ◽  
Tian-Sheng Zhao
Keyword(s):  
Catalytic Activity ◽  
Product Distribution ◽  
Co2 Hydrogenation ◽  
Light Olefins ◽  
High Catalytic Activity ◽  
Homogeneous Precipitation ◽  
Microwave Assisted

Small and uniform Fe–Zr–K particles with mesopores obtained by microwave assisted homogeneous precipitation show high catalytic activity and stability for the selective production of light olefins with low CO from CO2 hydrogenation.

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.

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
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