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Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts

This study reports the synthesis of Cu/ZnO supported on Al2O3, SiO2, ZrO2 and solid acid catalyst ZSM-5 for the hydrogenation of CO2 to methanol (MeOH). The activity of all the supported catalysts except Cu/ZnO supported on ZSM-5 (CZZSM) tested at 250 °C and 2.25 MPa for 13 h time-on-stream (TOS) sh...

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Main Author: Ayodele, O.B.
Format: Article
Published: Elsevier Ltd 2017
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021407294&doi=10.1016%2fj.jcou.2017.06.015&partnerID=40&md5=95211b56f813c54f416dc7a551e490d9
http://eprints.utp.edu.my/19441/
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spelling my.utp.eprints.194412018-04-20T05:56:29Z Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts Ayodele, O.B. This study reports the synthesis of Cu/ZnO supported on Al2O3, SiO2, ZrO2 and solid acid catalyst ZSM-5 for the hydrogenation of CO2 to methanol (MeOH). The activity of all the supported catalysts except Cu/ZnO supported on ZSM-5 (CZZSM) tested at 250 °C and 2.25 MPa for 13 h time-on-stream (TOS) showed carbon monoxide as byproduct due to the nefarious reverse water gas shift reaction (RWGS) that typically compete with MeOH production during CO2 hydrogenation. Methyl formate and dimethyl ether which are value added specialty chemicals were the byproducts when CZZSM was tested and their production mechanism was ascribed to the acidity of the ZSM-5 support. According to the NH3-TPD and CO2-TPD studies, CZZSM has considerable acidity of 15.02 μmol/m2 which is about 20 folds higher than the 0.74 μmol/m2 measured for the basic sites. Furthermore, the extreme high resolution scanning electron microscopy (XHR-SEM) and BET results showed that the ZSM-5 framework, structural and textural properties were retained after the synthesis of CZZSM which showed that the synthesis protocol was expedient. Thus, the effect of the solid acid catalyst was easily evaluated. In addition, the XHR-SEM, TEM and XRD results showed that the Co-oxide particles were highly dispersed nano-particle with average size of 2.4 nm. The CZZSM achieved and impressive CO2 conversion of 20.25 with average space-time yield of 60 and 16 gproduct gcat -1 min-1, and selectivity of 77.70 and 10.0 for MeOH and MeF, respectively which are promising for industrial application. © 2017 Elsevier Ltd. Elsevier Ltd 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021407294&doi=10.1016%2fj.jcou.2017.06.015&partnerID=40&md5=95211b56f813c54f416dc7a551e490d9 Ayodele, O.B. (2017) Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts. Journal of CO2 Utilization, 20 . pp. 368-377. http://eprints.utp.edu.my/19441/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description This study reports the synthesis of Cu/ZnO supported on Al2O3, SiO2, ZrO2 and solid acid catalyst ZSM-5 for the hydrogenation of CO2 to methanol (MeOH). The activity of all the supported catalysts except Cu/ZnO supported on ZSM-5 (CZZSM) tested at 250 °C and 2.25 MPa for 13 h time-on-stream (TOS) showed carbon monoxide as byproduct due to the nefarious reverse water gas shift reaction (RWGS) that typically compete with MeOH production during CO2 hydrogenation. Methyl formate and dimethyl ether which are value added specialty chemicals were the byproducts when CZZSM was tested and their production mechanism was ascribed to the acidity of the ZSM-5 support. According to the NH3-TPD and CO2-TPD studies, CZZSM has considerable acidity of 15.02 μmol/m2 which is about 20 folds higher than the 0.74 μmol/m2 measured for the basic sites. Furthermore, the extreme high resolution scanning electron microscopy (XHR-SEM) and BET results showed that the ZSM-5 framework, structural and textural properties were retained after the synthesis of CZZSM which showed that the synthesis protocol was expedient. Thus, the effect of the solid acid catalyst was easily evaluated. In addition, the XHR-SEM, TEM and XRD results showed that the Co-oxide particles were highly dispersed nano-particle with average size of 2.4 nm. The CZZSM achieved and impressive CO2 conversion of 20.25 with average space-time yield of 60 and 16 gproduct gcat -1 min-1, and selectivity of 77.70 and 10.0 for MeOH and MeF, respectively which are promising for industrial application. © 2017 Elsevier Ltd.
format Article
author Ayodele, O.B.
spellingShingle Ayodele, O.B.
Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts
author_facet Ayodele, O.B.
author_sort Ayodele, O.B.
title Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts
title_short Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts
title_full Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts
title_fullStr Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts
title_full_unstemmed Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts
title_sort eliminating reverse water gas shift reaction in co2 hydrogenation to primary oxygenates over mfi-type zeolite supported cu/zno nanocatalysts
publisher Elsevier Ltd
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021407294&doi=10.1016%2fj.jcou.2017.06.015&partnerID=40&md5=95211b56f813c54f416dc7a551e490d9
http://eprints.utp.edu.my/19441/
_version_ 1738656070561169408
score 13.211869

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