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Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging

Structural modifications of Cu/ZnO catalysts for methanol steam reforming (MSR) as a function of precipitate aging in catalysts preparation process has been investigated comparatively. Freshly precipitated Cu,Zn-hydroxycarbonate (HC) and Cu,Zn-hydroxynitrate (HN) were aged in their mother liquor fo...

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Egile Nagusiak: Muhamad, Ernee Noryana, Ramli, Irmawati, Yap, Taufiq Yun Hin, Abdullah, Abdul Halim, Kniep, Benjamin Louis, Girgsdies, Frank, Ressler, Thorsten
Formatua: Artikulua
Hizkuntza:English
Argitaratua: Elsevier 2008
Sarrera elektronikoa:http://psasir.upm.edu.my/id/eprint/5824/2/Comparative%20study%20of%20Cu.pdf
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spelling oai:psasir.upm.edu.my:5824 http://psasir.upm.edu.my/id/eprint/5824/ Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging Muhamad, Ernee Noryana Ramli, Irmawati Yap, Taufiq Yun Hin Abdullah, Abdul Halim Kniep, Benjamin Louis Girgsdies, Frank Ressler, Thorsten Structural modifications of Cu/ZnO catalysts for methanol steam reforming (MSR) as a function of precipitate aging in catalysts preparation process has been investigated comparatively. Freshly precipitated Cu,Zn-hydroxycarbonate (HC) and Cu,Zn-hydroxynitrate (HN) were aged in their mother liquor for a period of 120 min followed by washing, drying, calcination and reduction. Pronounced effect of aging was found for aged HC precipitates while no significant effect of aging was observed for aged HN solids. The bulk structure of the Cu/ZnO catalysts was investigated by means of TG/MS, in situ XRD and 63Cu NMR. The increase in the activity of the catalysts prepared by HC aging did not correlate linearly with the specific Cu surface area but coincides with an increase in the microstrain in the copper clusters presumably because of the improved interface between Cu and ZnO. Meanwhile, aging of HN precipitates results in large, separated and less strained Cu and ZnO particles with an inferior catalytic activity. Finally, both aged Cu/ZnO catalysts revealed smaller copper crystallite size compared to unaged samples. Elsevier 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/5824/2/Comparative%20study%20of%20Cu.pdf Muhamad, Ernee Noryana and Ramli, Irmawati and Yap, Taufiq Yun Hin and Abdullah, Abdul Halim and Kniep, Benjamin Louis and Girgsdies, Frank and Ressler, Thorsten (2008) Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging. Catalysis Today, 131 (1-4). pp. 118-124. ISSN 0920-5861 http://dx.doi.org/10.1016/j.cattod.2007.10.010 10.1016/j.cattod.2007.10.010
institution UPM IR
collection UPM IR
language English
description Structural modifications of Cu/ZnO catalysts for methanol steam reforming (MSR) as a function of precipitate aging in catalysts preparation process has been investigated comparatively. Freshly precipitated Cu,Zn-hydroxycarbonate (HC) and Cu,Zn-hydroxynitrate (HN) were aged in their mother liquor for a period of 120 min followed by washing, drying, calcination and reduction. Pronounced effect of aging was found for aged HC precipitates while no significant effect of aging was observed for aged HN solids. The bulk structure of the Cu/ZnO catalysts was investigated by means of TG/MS, in situ XRD and 63Cu NMR. The increase in the activity of the catalysts prepared by HC aging did not correlate linearly with the specific Cu surface area but coincides with an increase in the microstrain in the copper clusters presumably because of the improved interface between Cu and ZnO. Meanwhile, aging of HN precipitates results in large, separated and less strained Cu and ZnO particles with an inferior catalytic activity. Finally, both aged Cu/ZnO catalysts revealed smaller copper crystallite size compared to unaged samples.
format Article
author Muhamad, Ernee Noryana
Ramli, Irmawati
Yap, Taufiq Yun Hin
Abdullah, Abdul Halim
Kniep, Benjamin Louis
Girgsdies, Frank
Ressler, Thorsten
spellingShingle Muhamad, Ernee Noryana
Ramli, Irmawati
Yap, Taufiq Yun Hin
Abdullah, Abdul Halim
Kniep, Benjamin Louis
Girgsdies, Frank
Ressler, Thorsten
Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging
author_facet Muhamad, Ernee Noryana
Ramli, Irmawati
Yap, Taufiq Yun Hin
Abdullah, Abdul Halim
Kniep, Benjamin Louis
Girgsdies, Frank
Ressler, Thorsten
author_sort Muhamad, Ernee Noryana
title Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging
title_short Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging
title_full Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging
title_fullStr Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging
title_full_unstemmed Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging
title_sort comparative study of cu/zno catalysts derived from different precursors as a function of aging
publisher Elsevier
publishDate 2008
url http://psasir.upm.edu.my/id/eprint/5824/2/Comparative%20study%20of%20Cu.pdf
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score 13.4562235

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