Preparation and High-Throughput Testing of TiO2-Supported Co Catalysts for Fischer‒Tropsch Synthesis

A series of Co/TiO2 catalysts was tested in a parameters field study for Fischer‒Tropsch synthesis (FTS). All catalysts were prepared by the conventional impregnation technique to obtain an industrially relevant Co content of 10 wt % or 20 wt %, respectively. In summary, 10 different TiO2 of pure anatase phase, pure rutile phase, as well as mixed rutile and anatase phase were used as supports. Performance tests were conducted with a 32-fold high-throughput setup for accelerated catalyst benchmarking; thus, 48 experiments were completed within five weeks in a relevant operation parameters field (170 °C to 233.5 °C, H2/CO ratio 1 to 2.5, and 20 bar(g)). The most promising catalyst showed a CH4 selectivity of 5.3% at a relevant CO conversion of 60% and a C5+ productivity of 2.1 gC5+/(gCo h) at 207.5 °C. These TiO2-based materials were clearly differentiated with respect to the application as supports in Co-catalyzed FTS catalysis. The most prospective candidates are available for further FTS optimization at a commercial scale.

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Ru-M (M = Fe or Co) Catalysts with high Ru surface concentration for Fischer-Tropsch synthesis

Fuel ◽

10.1016/j.fuel.2021.120435 ◽

2021 ◽

Vol 293 ◽

pp. 120435

Author(s):

Dalia Liuzzi ◽

Francisco J. Pérez-Alonso ◽

Sergio Rojas

Keyword(s):

Surface Concentration ◽

Tropsch Synthesis ◽

Fischer Tropsch ◽

Fischer Tropsch Synthesis ◽

Co Catalysts

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Passivation of Co/Al2O3 Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch Synthesis

Catalysts ◽

10.3390/catal11060732 ◽

2021 ◽

Vol 11 (6) ◽

pp. 732

Author(s):

José Antonio Díaz-López ◽

Jordi Guilera ◽

Martí Biset-Peiró ◽

Dan Enache ◽

Gordon Kelly ◽

...

Keyword(s):

Atomic Layer Deposition ◽

Atomic Layer ◽

Tropsch Synthesis ◽

Catalyst Stability ◽

Fischer Tropsch ◽

Technical Feasibility ◽

Fischer Tropsch Synthesis ◽

Layer Deposition ◽

Co Conversion ◽

Al2o3 Catalyst

The present work explores the technical feasibility of passivating a Co/γ-Al2O3 catalyst by atomic layer deposition (ALD) to reduce deactivation rate during Fischer–Tropsch synthesis (FTS). Three samples of the reference catalyst were passivated using different numbers of ALD cycles (3, 6 and 10). Characterization results revealed that a shell of the passivating agent (Al2O3) grew around catalyst particles. This shell did not affect the properties of passivated samples below 10 cycles, in which catalyst reduction was hindered. Catalytic tests at 50% CO conversion evidenced that 3 and 6 ALD cycles increased catalyst stability without significantly affecting the catalytic performance, whereas 10 cycles caused blockage of the active phase that led to a strong decrease of catalytic activity. Catalyst deactivation modelling and tests at 60% CO conversion served to conclude that 3 to 6 ALD cycles reduced Co/γ-Al2O3 deactivation, so that the technical feasibility of this technique was proven in FTS.

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Fischer Tropsch synthesis: Deuterium isotopic study for the formation of oxygenates over CeO2 supported Pt–Co catalysts

Catalysis Communications ◽

10.1016/j.catcom.2012.03.028 ◽

2012 ◽

Vol 25 ◽

pp. 12-17 ◽

Cited By ~ 22

Author(s):

Muthu Kumaran Gnanamani ◽

Gary Jacobs ◽

Wilson D. Shafer ◽

Mauro C. Ribeiro ◽

Venkat Ramana Rao Pendyala ◽

...

Keyword(s):

Tropsch Synthesis ◽

Isotopic Study ◽

Fischer Tropsch ◽

Fischer Tropsch Synthesis ◽

Co Catalysts

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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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Fischer–Tropsch synthesis: A review of the effect of CO conversion on methane selectivity

Applied Catalysis A General ◽

10.1016/j.apcata.2013.10.061 ◽

2014 ◽

Vol 470 ◽

pp. 250-260 ◽

Cited By ~ 141

Author(s):

Jia Yang ◽

Wenping Ma ◽

De Chen ◽

Anders Holmen ◽

Burtron H. Davis

Keyword(s):

Tropsch Synthesis ◽

Fischer Tropsch ◽

Fischer Tropsch Synthesis ◽

Co Conversion ◽

Methane Selectivity

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Compact reactor for Fischer–Tropsch synthesis based on hierarchically structured Co catalysts: Towards better stability

Catalysis Today ◽

10.1016/j.cattod.2013.03.010 ◽

2013 ◽

Vol 215 ◽

pp. 121-130 ◽

Cited By ~ 12

Author(s):

Jun Zhu ◽

Jia Yang ◽

Andreas Helland Lillebø ◽

Ye Zhu ◽

Yingda Yu ◽

...

Keyword(s):

Tropsch Synthesis ◽

Fischer Tropsch ◽

Fischer Tropsch Synthesis ◽

Co Catalysts

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The Impact of Reduction Temperature and Nanoparticles Size on the Catalytic Activity of Cobalt-Containing BEA Zeolite in Fischer–Tropsch Synthesis

Catalysts ◽

10.3390/catal10050553 ◽

2020 ◽

Vol 10 (5) ◽

pp. 553 ◽

Cited By ~ 1

Author(s):

Karolina A. Chalupka ◽

Jacek Grams ◽

Pawel Mierczynski ◽

Malgorzata I. Szynkowska ◽

Jacek Rynkowski ◽

...

Keyword(s):

Cobalt Nanoparticles ◽

Tropsch Synthesis ◽

Preparation Procedure ◽

Pure Hydrogen ◽

Reduction Temperature ◽

Fischer Tropsch ◽

Fischer Tropsch Synthesis ◽

Bea Zeolite ◽

Co Conversion ◽

Liquid Products

A goal of this work was to investigate the influence of the preparation procedure and activation conditions (reduction temperature and reducing medium: pure hydrogen (100% H2) or hydrogen-argon mixture (5% H2-95% Ar)) on the activity of Co-containing BEA zeolites in Fischer–Tropsch synthesis. Therefore, a series of CoBEA zeolites were obtained by a conventional wet impregnation (Co5.0AlBEA) and a two-step postsynthesis preparation procedure involving dealumination and impregnation steps (Co5.0SiBEA). Both types of zeolites were calcined in air at 500 °C for 3 h and then reduced at 500, 800 and 900 °C for 1 h in 100 % H2 and in 5% H2–95% Ar mixture flow. The obtained Red-C-Co5.0AlBEA and Red-C-Co5.0SiBEA catalysts with various physicochemical properties were tested in Fischer–Tropsch reaction. Among the studied catalysts, Red-C-Co5.0SiBEA reduced at 500 °C in pure hydrogen was the most active, presenting selectivity to liquid products of 91% containing mainly C7–C16 n-alkanes and isoalkanes as well as small amount of olefins, with CO conversion of about 11%. The Red-C-Co5.0AlBEA catalysts were not active in the Fischer–Tropsch synthesis. It showed that removal of aluminum from the BEA zeolite in the first step of postsynthesis preparation procedure played a key role in the preparation of efficient catalysts for Fischer–Tropsch synthesis. An increase of the reduction temperature from 500 to 800 and 900 °C resulted in two times lower CO conversion and a drop of the selectivity towards liquid products (up to 62%–88%). The identified main liquid products were n-alkanes and isoalkanes. The higher activity of Red-C-Co5.0SiBEA catalysts can be assigned to good dispersion of cobalt nanoparticles and thus a smaller cobalt nanoparticles size than in the case of Red-C-Co5.0AlBEA catalyst.

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