Effects of reactor diameter on the plugging of fixed-bed fischer-tropsch reactors

Iron-based nanocatalyst was prepared via impregnation method on SiO2 support. The effects of promoters, namely, K and Cu, on the physical properties and catalytic performance in FTS have been investigated. The FTS performance of the synthesized nanocatalysts was examined in a fixed-bed microreactor at temperature of 523K, atmospheric pressure, 1.5 reactant ratio (H2/CO) and space velocity of 3L/g-cat.h. In FTS reaction, Cu promoter resulted in a lower CO conversion and C5+ hydrocarbons selectivity but higher selectivity to the lighter hydrocarbons (C1-C4) comparedto those obtained using the K promoter. Higher CO conversion (28.9%) and C5+ hydrocarbons selectivity (54.4%) were obtained using K as a promoter compared to that of Cu promoter. However, the K-promoted nanocatalyst resulted in a lower CO conversion but higher selectivity of the heavy hydrocarbons (C5+) compared to those obtained using the un-promoted nanocatalyst.

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Liquid accumulation in catalyst pores in a Fischer-Tropsch fixed-bed reactor

Industrial & Engineering Chemistry Process Design and Development ◽

10.1021/i200031a015 ◽

1985 ◽

Vol 24 (4) ◽

pp. 986-995 ◽

Cited By ~ 22

Author(s):

George A. Huff ◽

Charles N. Satterfield

Keyword(s):

Fixed Bed ◽

Fixed Bed Reactor ◽

Fischer Tropsch

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Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance

Symmetry ◽

10.3390/sym10110572 ◽

2018 ◽

Vol 10 (11) ◽

pp. 572 ◽

Cited By ~ 13

Author(s):

Omid Akbarzadeh ◽

Noor Mohd Zabidi ◽

Yasmin Abdul Wahab ◽

Nor Hamizi ◽

Zaira Chowdhury ◽

...

Keyword(s):

Carbon Nanotubes ◽

Fixed Bed ◽

Tropsch Synthesis ◽

Fischer Tropsch ◽

Fischer Tropsch Synthesis ◽

Cobalt Oxide Nanoparticles ◽

Co Conversion ◽

Multi Walled Carbon Nanotubes ◽

Pre Treatment ◽

The Stability

Pre-treating the multi-walled carbon nanotubes (CNTs) support by refluxing in 35 vol% nitric acid followed by heating at the temperature of 600 to 900 °C resulted in the formation of defects on the CNTs. Increasing the temperature of the pre-treatment of the CNTs from 600 °C to 900 °C, enhanced the fraction of cobalt-oxide nanoparticles encapsulated in the channels of CNTs from 31% to 70%. The performance of Co/CNTs in Fischer-Tropsch synthesis (FTS) was evaluated in a fixed-bed micro-reactor at a temperature of 240 °C and a pressure of 2.0 MPa. The highest CO conversion obtained over Co/CNTs.A.900 was 59% and it dropped by ~3% after 130 h of time-on-stream. However, maximum CO conversion using Co/CNTs.A.600 catalysts was 28% and it decreased rapidly by about 54% after 130 h of time-on-stream. These findings show that the combined acid and thermal pre-treatment of CNTs support at 900 °C has improved the stability and activity of the Co/CNTs catalyst in FTS.

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Effect of CO Conversion on the Product Distribution of a Co/Al2O3 Fischer–Tropsch Synthesis Catalyst Using a Fixed Bed Reactor

Catalysis Letters ◽

10.1007/s10562-012-0908-z ◽

2012 ◽

Vol 142 (11) ◽

pp. 1382-1387 ◽

Cited By ~ 41

Author(s):

Dragomir B. Bukur ◽

Zhendong Pan ◽

Wenping Ma ◽

Gary Jacobs ◽

Burtron H. Davis

Keyword(s):

Fixed Bed ◽

Product Distribution ◽

Tropsch Synthesis ◽

Fixed Bed Reactor ◽

Fischer Tropsch ◽

Fischer Tropsch Synthesis ◽

Co Conversion

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Modeling and operating conditions optimization of Fischer–Tropsch synthesis in a fixed-bed reactor

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2012.02.013 ◽

2012 ◽

Vol 18 (4) ◽

pp. 1515-1521 ◽

Cited By ~ 36

Author(s):

Ali Akbar Mirzaei ◽

Bahman Shirzadi ◽

Hossein Atashi ◽

Mohsen Mansouri

Keyword(s):

Fixed Bed ◽

Operating Conditions ◽

Tropsch Synthesis ◽

Fixed Bed Reactor ◽

Fischer Tropsch ◽

Fischer Tropsch Synthesis

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On efficiency of vanadium-oxide promoter in cobalt Fischer – Tropsch catalysts

Kataliz v promyshlennosti ◽

10.18412/1816-0387-2021-1-2-15 ◽

2021 ◽

Vol 1 (1-2) ◽

pp. 15

Author(s):

Elham Yaghoobpour ◽

Yahya Zamani ◽

Saeed Zarrinpashne ◽

Akbar Zamaniyan

Keyword(s):

Vanadium Oxide ◽

Active Sites ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Bet Surface Area ◽

Incipient Wetness Impregnation ◽

Impregnation Method ◽

Fischer Tropsch ◽

Co Conversion ◽

Loading Amount

Promoters and their loading amount have crucial roles in cobalt Fischer – Tropsch catalysts. In this regard, the effects of vanadium oxide (V2O5) as a proposed promoter for Co catalyst supported on TiO2 have been investigated. Three catalysts with 0, 1, and 3 wt.% of V2O5 promoter loading are prepared by the incipient wetness impregnation method, and characterized by the BET surface area analyzer, XRD, H2-TPR, and TEM techniques. The fixed-bed reactor was employed for their evaluations. It was found that the catalyst containing 1 wt.% V2O5 has the best performance among the evaluated catalysts, demonstrating remarkable selectivity: 92 % C5+ and 5.7 % CH4, together with preserving the amount of CO conversion compared to the unpromoted catalyst. Furthermore, it is reported that the excess addition of V2O5 promoter (> 1 wt.%) in the introduced catalyst leads to the detrimental effect on the CO conversion and C5+ selectivity, mainly owing to diminished active sites by V2O5 loading.

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