co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites
SSCI-VIDE+ING+APN:DLR:NOG:YSC:FRM International audience 1.IntroductionSynthetic fuels and base chemicals can be obtained from both fossil and renewable sources through the conversion of synthesis gas (syngas). Biomass-derived syngas contain significant concentrations of chlorine that may contaminat...
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ftunivlyon:oai:HAL:hal-01327937v1 2024-05-12T08:12:01+00:00 co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites Paredes-Numez, A. Lorito, D. Guilhaume, N. Schuurman, Y. Meunier, Frédéric IRCELYON-Ingéniérie, du matériau au réacteur (ING) Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) Tromso, Norway 2016-06-05 https://hal.science/hal-01327937 en eng HAL CCSD hal-01327937 https://hal.science/hal-01327937 NGCS 11 Tromso 2016The 11th Natural Gas Conversion Symposium https://hal.science/hal-01327937 NGCS 11 Tromso 2016The 11th Natural Gas Conversion Symposium, Jun 2016, Tromso, Norway [CHIM.CATA]Chemical Sciences/Catalysis [SDE.ES]Environmental Sciences/Environment and Society info:eu-repo/semantics/conferenceObject Conference papers 2016 ftunivlyon 2024-04-18T15:26:13Z SSCI-VIDE+ING+APN:DLR:NOG:YSC:FRM International audience 1.IntroductionSynthetic fuels and base chemicals can be obtained from both fossil and renewable sources through the conversion of synthesis gas (syngas). Biomass-derived syngas contain significant concentrations of chlorine that may contaminate downstream catalysts. Rytter and co-workers reported that the presence of Cl introduced ex situ during cobalt-based catalyst preparation decreased the metal surface without, surprisingly, affecting activity, thus increasing the turnover frequency [1]. Davis and co-workers investigated the effect of alkali and chloride addition to a Fischer-Tropsch slurry phase reactor using a Co-based catalyst and noted a marked deactivation by halides and potassium [2]. The authors related the metallic cobalt poisoning to a blocking effect of metal sites by halides and potassium in agreement with results of H2 chemisorption obtained ex situ on used cobalt FT catalysts [2]. We report herein an operando diffuse reflectance FT-IR spectroscopy (DRIFTS) study in which the hydrogenation of CO is monitored in the presence of 150 ppm of chlorine. DRIFTS enables monitoring the state of the cobalt surface, which is typically covered with various carbonyl species under reaction conditions [3].2.ExperimentalThe preparation of the 14 wt.% Co/Al2O3 catalyst, experimental setup, DRIFTS cell and procedures are described in details elsewhere [3]. The hydrogenation of CO was performed at atmospheric pressure using a modified high temperature DRIFT cell. The reactor effluent was quantified using a 2 m-pathlength FT-IR gas cell. Methane, ethane, propene and methanol were the main reaction products in the present conditions and were quantified, while higher hydrocarbons were not monitored. The chlorine was introduced via a saturator held at -70°C containing trichloroethylene (TCE). Differential conditions were used, to ensure that the catalyst bed remained gradientless.3.Results and discussionThe rates of formation of the main products sharply ... Conference Object Tromso Tromso Université de Lyon: HAL Norway Tromso ENVELOPE(16.546,16.546,68.801,68.801) |
institution |
Open Polar |
collection |
Université de Lyon: HAL |
op_collection_id |
ftunivlyon |
language |
English |
topic |
[CHIM.CATA]Chemical Sciences/Catalysis [SDE.ES]Environmental Sciences/Environment and Society |
spellingShingle |
[CHIM.CATA]Chemical Sciences/Catalysis [SDE.ES]Environmental Sciences/Environment and Society Paredes-Numez, A. Lorito, D. Guilhaume, N. Schuurman, Y. Meunier, Frédéric co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites |
topic_facet |
[CHIM.CATA]Chemical Sciences/Catalysis [SDE.ES]Environmental Sciences/Environment and Society |
description |
SSCI-VIDE+ING+APN:DLR:NOG:YSC:FRM International audience 1.IntroductionSynthetic fuels and base chemicals can be obtained from both fossil and renewable sources through the conversion of synthesis gas (syngas). Biomass-derived syngas contain significant concentrations of chlorine that may contaminate downstream catalysts. Rytter and co-workers reported that the presence of Cl introduced ex situ during cobalt-based catalyst preparation decreased the metal surface without, surprisingly, affecting activity, thus increasing the turnover frequency [1]. Davis and co-workers investigated the effect of alkali and chloride addition to a Fischer-Tropsch slurry phase reactor using a Co-based catalyst and noted a marked deactivation by halides and potassium [2]. The authors related the metallic cobalt poisoning to a blocking effect of metal sites by halides and potassium in agreement with results of H2 chemisorption obtained ex situ on used cobalt FT catalysts [2]. We report herein an operando diffuse reflectance FT-IR spectroscopy (DRIFTS) study in which the hydrogenation of CO is monitored in the presence of 150 ppm of chlorine. DRIFTS enables monitoring the state of the cobalt surface, which is typically covered with various carbonyl species under reaction conditions [3].2.ExperimentalThe preparation of the 14 wt.% Co/Al2O3 catalyst, experimental setup, DRIFTS cell and procedures are described in details elsewhere [3]. The hydrogenation of CO was performed at atmospheric pressure using a modified high temperature DRIFT cell. The reactor effluent was quantified using a 2 m-pathlength FT-IR gas cell. Methane, ethane, propene and methanol were the main reaction products in the present conditions and were quantified, while higher hydrocarbons were not monitored. The chlorine was introduced via a saturator held at -70°C containing trichloroethylene (TCE). Differential conditions were used, to ensure that the catalyst bed remained gradientless.3.Results and discussionThe rates of formation of the main products sharply ... |
author2 |
IRCELYON-Ingéniérie, du matériau au réacteur (ING) Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Paredes-Numez, A. Lorito, D. Guilhaume, N. Schuurman, Y. Meunier, Frédéric |
author_facet |
Paredes-Numez, A. Lorito, D. Guilhaume, N. Schuurman, Y. Meunier, Frédéric |
author_sort |
Paredes-Numez, A. |
title |
co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites |
title_short |
co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites |
title_full |
co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites |
title_fullStr |
co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites |
title_full_unstemmed |
co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites |
title_sort |
co hydrogenation on cobalt-based fisher-tropsch catalysts: chlorine poisoning reveals the nature of the most active sites |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-01327937 |
op_coverage |
Tromso, Norway |
long_lat |
ENVELOPE(16.546,16.546,68.801,68.801) |
geographic |
Norway Tromso |
geographic_facet |
Norway Tromso |
genre |
Tromso Tromso |
genre_facet |
Tromso Tromso |
op_source |
NGCS 11 Tromso 2016The 11th Natural Gas Conversion Symposium https://hal.science/hal-01327937 NGCS 11 Tromso 2016The 11th Natural Gas Conversion Symposium, Jun 2016, Tromso, Norway |
op_relation |
hal-01327937 https://hal.science/hal-01327937 |
_version_ |
1798834285783810048 |