Catalytic Performance of Alumina-Supported Cobalt Carbide Catalysts for Low-Temperature Fischer-Tropsch Synthesis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F22%3A43967410" target="_blank" >RIV/49777513:23640/22:43967410 - isvavai.cz</a>

Alternative codes found

RIV/62243136:_____/22:N0000017

Result on the web

<a href="https://doi.org/10.3390/catal12101222" target="_blank" >https://doi.org/10.3390/catal12101222</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/catal12101222" target="_blank" >10.3390/catal12101222</a>

Result language

angličtina

Original language name

Catalytic Performance of Alumina-Supported Cobalt Carbide Catalysts for Low-Temperature Fischer-Tropsch Synthesis

Original language description

The determination of the catalyst&apos;s active phase helps improve the catalytic performance of the Fischer-Tropsch (FT) synthesis. Different phases of cobalt, including cobalt oxide, carbide, and metal, exist during the reaction. The content of each phase can affect the catalytic performance and product distribution. In this study, a series of cobalt carbide catalysts were synthesized by exposure of Co/Al2O3 catalyst to CH4 at different temperatures from 300 degrees C to 800 degrees C. The physicochemical properties of the carbide catalysts (CoCx/Al2O3) were evaluated by different characterization methods. The catalytic performances of the catalysts were investigated in an autoclave reactor to determine the role of cobalt carbides on the CO conversion and product distribution during the reaction. XRD and XPS analysis confirmed the presence of Co2C in the prepared catalysts. The higher carbidation temperature resulted in the decomposition of methane into hydrogen and carbon, and the presence of graphitic carbon was confirmed by XRD, XPS, SEM, and Raman analysis. The Co2C also decomposed to metallic cobalt and carbon, and the content of cobalt carbide decreased at higher carbidation temperatures. Higher content of Co2C resulted in a lower CO conversion and higher selectivity to light alkanes, mainly methane. The higher carbidation temperature resulted in the decomposition of Co2C to metallic cobalt with higher activity in the FT reaction. The CO conversion increased by increasing the carbidation temperature from 300 degrees C to 800 degrees C, due to the higher content of metallic cobalt. In the presence of pure hydrogen, the Co2C could be converted mainly into hexagonal, close-packed (hcp) Co with higher activity for dissociative adsorption of CO, which resulted in higher catalyst activity and selectivity to heavier hydrocarbons.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20704 - Energy and fuels

Project

<a href="/en/project/LM2018119" target="_blank" >LM2018119: Catalytic processes for efficient utilization of carbonaceous energy raw materials</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Catalysts

ISSN

2073-4344

e-ISSN

2073-4344

Volume of the periodical

12

Issue of the periodical within the volume

10

Country of publishing house

CH - SWITZERLAND

Number of pages

18

Pages from-to

nestrankovano

UT code for WoS article

000874386200001

EID of the result in the Scopus database

2-s2.0-85140829556