Microwave Assisted Fischer - Tropsch Synthesis at a Atmospheric Pressure

2017 ◽  
Vol 68 (5) ◽  
pp. 1040-1043
Author(s):  
Ioan Tudor Sibianu ◽  
Daniela Berger ◽  
Cristian Matei ◽  
Ioan Calinescu
Keyword(s):  
Microwave Heating ◽  
Atmospheric Pressure ◽  
Tropsch Synthesis ◽  
Molar Ratio ◽  
Microwave Activation ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Molar Ratios ◽  
Microwave Assisted ◽  
Co Conversion

The purpose of this study was to test the efficiency of the microwave activation of a Fischer-Tropsch used catalyst under atmospheric pressure. Experiments were carried out on a cobalt, manganese, calcium catalyst on a 10:1:1 molar ratio that was impregnated on a AlSBA-15 support. The amount of metal impregnated was equivalent to 20% of the supports mass. Experiments were carried out both with conventional as well as microwave heating. In order to compare the efficiency of both types of heating, the product compositions were determined at 110, 140, 170, 190, 200, 225, 250 oC. At each temperature 4:1, 2:1, 1.25:1 H2:CO molar ratios were tested. The microwave assisted Fischer-Tropsch reaction allows the use of lower temperatures, as well as larger CO conversion values with better yields especially in methane.

scholarly journals Effects of Co/Ce molar ratio and operating temperature on nanocatalyst performance in the Fischer–Tropsch synthesis

RSC Advances ◽  
2017 ◽  
Vol 7 (55) ◽  
pp. 34497-34507 ◽  
Author(s):  
Tahereh Taherzadeh Lari ◽  
Ali Akbar Mirzaei ◽  
Hossein Atashi
Keyword(s):  
Operating Temperature ◽  
Catalytic Performance ◽  
Tropsch Synthesis ◽  
Molar Ratio ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Molar Ratios

The effect of Co/Ce molar ratios on the catalytic performance in FTS.

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

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 352
Author(s):  
Christian Schulz ◽  
Peter Kolb ◽  
Dennis Krupp ◽  
Lars Ritter ◽  
Alfred Haas ◽  
...  
Keyword(s):  
High Throughput ◽  
Anatase Phase ◽  
Rutile Phase ◽  
Tropsch Synthesis ◽  
Performance Tests ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Co Catalysts ◽  
Impregnation Technique ◽  
Co Conversion

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.

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

Catalysts ◽  
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.

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

Symmetry ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 572 ◽  
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.

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

2012 ◽  
Vol 142 (11) ◽  
pp. 1382-1387 ◽  
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

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

2014 ◽  
Vol 470 ◽  
pp. 250-260 ◽  
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

Fischer-Tropsch Synthesis - Tests of Cobalt Catalysts at Atmospheric Pressure

1947 ◽  
Vol 39 (12) ◽  
pp. 1548-1554 ◽  
Author(s):  
R. B. Anderson ◽  
Abraham. Krieg ◽  
Bernard. Seligman ◽  
W. E. O'Neill
Keyword(s):  
Atmospheric Pressure ◽  
Tropsch Synthesis ◽  
Cobalt Catalysts ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

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

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 553 ◽  
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.

Effects of Different Pretreatment Pressures on the Catalytic Performance of Catalyst Derived from (CO)6Co2CC(COOH)2 for Fischer-Tropsch Synthesis

2013 ◽  
Vol 781-784 ◽  
pp. 186-189
Author(s):  
Yin Yan Wang ◽  
Feng Hua Bai ◽  
Ang Li ◽  
Bo Zhao ◽  
Hai Quan Su
Keyword(s):  
Catalytic Performance ◽  
Tropsch Synthesis ◽  
Cobalt Carbonyl ◽  
Fischer Tropsch ◽  
Carbonyl Clusters ◽  
Fischer Tropsch Synthesis ◽  
Tem Characterization ◽  
Co Conversion ◽  
New Type ◽  
Cobalt Species

New type of Co-based catalyst was prepared using (CO)6Co2CC(COOH)2 as precursor supported on γ-Al2O3 support. The effects of pretreatment pressures on the catalysts properties and the F-T synthesis performance were investigated in details. Combined with TEM characterization technology, it was found that under different pretreatment pressures (0 MPa, 1.0 MPa, 2.0 MPa), the structure of carbonyl clusters underwent different changes. Moreover, the aggregation degree of cobalt species depends on the pretreated pressure applied. In addition, the catalytic performance of the cobalt carbonyl catalyst pretreated with different pressures was performed and both CO conversion and C5+ selectivity exhibited the order of Co2/2MPa/Al2O3 > Co2/1MPa/Al2O3 > Co2/0MPa/Al2O3.

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