Effects of reduction and regeneration conditions on the activity of cuo-zno catalysts

The influence of thermal and hydrothermal treatments and reduction processes on the activity of CuO-ZnO catalysts was studied. Temperature-programmed reduction (TPR) was used in the study of catalyst activation with different reduction mixtures. A mixture of H2 and N2 in the range of 500 to 573 K wa...

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Autores principales: Quincoces, C.E., Amadeo, N.E., González, M.G.
Formato: SER
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01672991_v111_n_p535_Quincoces
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01672991_v111_n_p535_Quincoces2023-10-03T15:04:39Z Effects of reduction and regeneration conditions on the activity of cuo-zno catalysts Quincoces, C.E. Amadeo, N.E. González, M.G. The influence of thermal and hydrothermal treatments and reduction processes on the activity of CuO-ZnO catalysts was studied. Temperature-programmed reduction (TPR) was used in the study of catalyst activation with different reduction mixtures. A mixture of H2 and N2 in the range of 500 to 573 K was the most effective reducing agent. High temperature, water vapor and a high partial pressure of hydrogen enhance Cu sintering and Cu-Zn alloy formation with a decrease in catalytic activity. XRD analysis of reactivated catalysts showed that their deactivation can be related to the formation of surface spinel species. Reoxidation at 623 K and subsequent reduction of the aged catalyst led to metal redispersion but not catalyst regeneration. © 1997 Elsevier Science B.V. All rights reserved. SER info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01672991_v111_n_p535_Quincoces
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The influence of thermal and hydrothermal treatments and reduction processes on the activity of CuO-ZnO catalysts was studied. Temperature-programmed reduction (TPR) was used in the study of catalyst activation with different reduction mixtures. A mixture of H2 and N2 in the range of 500 to 573 K was the most effective reducing agent. High temperature, water vapor and a high partial pressure of hydrogen enhance Cu sintering and Cu-Zn alloy formation with a decrease in catalytic activity. XRD analysis of reactivated catalysts showed that their deactivation can be related to the formation of surface spinel species. Reoxidation at 623 K and subsequent reduction of the aged catalyst led to metal redispersion but not catalyst regeneration. © 1997 Elsevier Science B.V. All rights reserved.
format SER
author Quincoces, C.E.
Amadeo, N.E.
González, M.G.
spellingShingle Quincoces, C.E.
Amadeo, N.E.
González, M.G.
Effects of reduction and regeneration conditions on the activity of cuo-zno catalysts
author_facet Quincoces, C.E.
Amadeo, N.E.
González, M.G.
author_sort Quincoces, C.E.
title Effects of reduction and regeneration conditions on the activity of cuo-zno catalysts
title_short Effects of reduction and regeneration conditions on the activity of cuo-zno catalysts
title_full Effects of reduction and regeneration conditions on the activity of cuo-zno catalysts
title_fullStr Effects of reduction and regeneration conditions on the activity of cuo-zno catalysts
title_full_unstemmed Effects of reduction and regeneration conditions on the activity of cuo-zno catalysts
title_sort effects of reduction and regeneration conditions on the activity of cuo-zno catalysts
url http://hdl.handle.net/20.500.12110/paper_01672991_v111_n_p535_Quincoces
work_keys_str_mv AT quincocesce effectsofreductionandregenerationconditionsontheactivityofcuoznocatalysts
AT amadeone effectsofreductionandregenerationconditionsontheactivityofcuoznocatalysts
AT gonzalezmg effectsofreductionandregenerationconditionsontheactivityofcuoznocatalysts
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