Effective control of α-olefin selectivity during Fischer–Tropsch synthesis over polyethylene-glycol enwrapped porous catalyst

2011 ◽  
Vol 12 (15) ◽  
pp. 1466-1470 ◽  
Author(s):  
Junhu Gao ◽  
Baoshan Wu ◽  
Liping Zhou ◽  
Yong Yang ◽  
Xu Hao ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Tropsch Synthesis ◽  
Effective Control ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Porous Catalyst ◽  
Olefin Selectivity

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).

Fischer–Tropsch synthesis using a porous catalyst packing: experimental evidence of an efficient use of permeable composite monoliths as a novel type of the Fischer–Tropsch synthesis catalyst

2003 ◽  
Vol 79-80 ◽  
pp. 465-470 ◽  
Author(s):  
Alexander A. Khassin ◽  
Tamara M. Yurieva ◽  
Anatolii G. Sipatrov ◽  
Valerii A. Kirillov ◽  
Galina K. Chermashentseva ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Porous Catalyst

scholarly journals Linear α-olefin production with Na-promoted Fe–Zn catalysts via Fischer–Tropsch synthesis

RSC Advances ◽  
2019 ◽  
Vol 9 (25) ◽  
pp. 14176-14187 ◽  
Author(s):  
Sunkyu Yang ◽  
Sungwoo Lee ◽  
Seok Chang Kang ◽  
Seung Ju Han ◽  
Ki-Won Jun ◽  
...  
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Intimate Contact ◽  
Fischer Tropsch Synthesis ◽  
Olefin Production ◽  
Linear Olefin ◽  
Olefin Selectivity

Intimate contact between Fe5C2 and Na2O leads to high linear olefin selectivity with minimizing branched paraffin formation.

Fischer Tropsch Synthesis: The Promoter Effects, Operating Conditions, and Reactor Synthesis

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Majid Sarkari ◽  
Farhad Fazlollahi ◽  
Hossein Atashi
Keyword(s):  
Fixed Bed ◽  
Operating Conditions ◽  
Tropsch Synthesis ◽  
Fixed Bed Reactor ◽  
Fischer Tropsch ◽  
Reaction Conditions ◽  
Fischer Tropsch Synthesis ◽  
Hydrocarbon Chains ◽  
Promoter Effects ◽  
Olefin Selectivity

The effects of K, Ce, Zn, Cs, and Rb promoters on the structure and catalytic behavior of precipitated 50%Fe/50%Mn catalyst in Fischer–Tropsch synthesis (FTS) were investigated in a fixed-bed reactor. The effects of promoter on Fischer-Tropsch iron catalysts caused an increased growth probability of hydrocarbon chains from 0.67 to 0.75 for K to Rb promoter, and the olefin/paraffin ratios increased from 0.99 to 1.36 for Rb to K-promoted catalyst. The effect on the olefin selectivity was certainly due to increased adsorption strength of CO causing an enhanced displacement of olefin. The catalysts were assessed in terms of their FTS activity and product selectivity using Anderson–Schulz–Flory (ASF) models. The effects of various reaction conditions such as flow rates, temperatures, and H2/CO feed ratios were studied and process synthesis concepts were used to investigate interactions between the optimum regions for reactor operation and the experimental results.

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