View in EDS

Synchrotron X-ray microtomography of Raney-type nickel catalysts prepared by gas atomisation: Effect of microstructure on catalytic performance

Saved in:
Bibliographic Details
Title: Synchrotron X-ray microtomography of Raney-type nickel catalysts prepared by gas atomisation: Effect of microstructure on catalytic performance
Authors: Devred, F.1 fdevred@yahoo.fr, Reinhart, G.2, Iles, G.N.2, van der Klugt, B.1, Adkins, N.J.3, Bakker, J.W.1, Nieuwenhuys, B.E.1,4
Source: Catalysis Today. Apr2011, Vol. 163 Issue 1, p13-19. 7p.
Subjects: Synchrotrons, Nickel catalysts, Atomization, Microstructure, Sodium hydroxide, Solution (Chemistry), Nitrobenzene
Abstract: Abstract: Synchrotron X-ray microtomography (SXRM) was used to examine the microstructure of various Ni–Al alloys prepared by gas atomisation. The resulting Raney-type nickel catalysts that were activated by chemical treatment with a concentrated sodium hydroxide solution (20wt% in water) were also studied. The main objective of this work is to correlate the microstructure of various Ni–Al alloys prepared by gas atomisation and the catalytic performance of the resulting Raney-type nickel catalysts. It appears that a NiAl3/Ni2Al3 ratio around 2.3 in the precursor alloy prepared by gas atomisation favours the formation of a dendritic network in the atomised spherical particle. The spherical shape of the particle and the dendritic network are still present after the leaching process in the Raney-type nickel catalysts. After activation, the interdendritic space forms a macroporous network that is directly linked to the catalytic performance. Parameters of the precursor alloy, i.e. particle size, phase composition, are chosen to obtain an optimal catalytic performance. In this way, an activity is obtained that is at least a factor of 2 higher than that of alloys prepared by the commercial cast-and-crush method. Inductively coupled plasma optical emission spectroscopy (ICP-OES) and BET measurements were used for bulk analysis and determination of the surface area, respectively. Hydrogenation of nitrobenzene and butyraldehyde were used as test reactions. A model that directly correlates the microstructure of a precursor alloy processed by gas atomisation and the catalytic performance of the resulting catalyst is proposed. [Copyright &y& Elsevier]
Copyright of Catalysis Today is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 59172007
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Synchrotron X-ray microtomography of Raney-type nickel catalysts prepared by gas atomisation: Effect of microstructure on catalytic performance
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Devred%2C+F%2E%22">Devred, F.</searchLink><relatesTo>1</relatesTo><i> fdevred@yahoo.fr</i><br /><searchLink fieldCode="AR" term="%22Reinhart%2C+G%2E%22">Reinhart, G.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Iles%2C+G%2EN%2E%22">Iles, G.N.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22van+der+Klugt%2C+B%2E%22">van der Klugt, B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Adkins%2C+N%2EJ%2E%22">Adkins, N.J.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Bakker%2C+J%2EW%2E%22">Bakker, J.W.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Nieuwenhuys%2C+B%2EE%2E%22">Nieuwenhuys, B.E.</searchLink><relatesTo>1,4</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Catalysis+Today%22">Catalysis Today</searchLink>. Apr2011, Vol. 163 Issue 1, p13-19. 7p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Synchrotrons%22">Synchrotrons</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel+catalysts%22">Nickel catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Atomization%22">Atomization</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Sodium+hydroxide%22">Sodium hydroxide</searchLink><br /><searchLink fieldCode="DE" term="%22Solution+%28Chemistry%29%22">Solution (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrobenzene%22">Nitrobenzene</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Synchrotron X-ray microtomography (SXRM) was used to examine the microstructure of various Ni–Al alloys prepared by gas atomisation. The resulting Raney-type nickel catalysts that were activated by chemical treatment with a concentrated sodium hydroxide solution (20wt% in water) were also studied. The main objective of this work is to correlate the microstructure of various Ni–Al alloys prepared by gas atomisation and the catalytic performance of the resulting Raney-type nickel catalysts. It appears that a NiAl3/Ni2Al3 ratio around 2.3 in the precursor alloy prepared by gas atomisation favours the formation of a dendritic network in the atomised spherical particle. The spherical shape of the particle and the dendritic network are still present after the leaching process in the Raney-type nickel catalysts. After activation, the interdendritic space forms a macroporous network that is directly linked to the catalytic performance. Parameters of the precursor alloy, i.e. particle size, phase composition, are chosen to obtain an optimal catalytic performance. In this way, an activity is obtained that is at least a factor of 2 higher than that of alloys prepared by the commercial cast-and-crush method. Inductively coupled plasma optical emission spectroscopy (ICP-OES) and BET measurements were used for bulk analysis and determination of the surface area, respectively. Hydrogenation of nitrobenzene and butyraldehyde were used as test reactions. A model that directly correlates the microstructure of a precursor alloy processed by gas atomisation and the catalytic performance of the resulting catalyst is proposed. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Catalysis Today is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=59172007
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.cattod.2010.01.054
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 13
    Subjects:
      – SubjectFull: Synchrotrons
        Type: general
      – SubjectFull: Nickel catalysts
        Type: general
      – SubjectFull: Atomization
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Sodium hydroxide
        Type: general
      – SubjectFull: Solution (Chemistry)
        Type: general
      – SubjectFull: Nitrobenzene
        Type: general
    Titles:
      – TitleFull: Synchrotron X-ray microtomography of Raney-type nickel catalysts prepared by gas atomisation: Effect of microstructure on catalytic performance
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Devred, F.
      – PersonEntity:
          Name:
            NameFull: Reinhart, G.
      – PersonEntity:
          Name:
            NameFull: Iles, G.N.
      – PersonEntity:
          Name:
            NameFull: van der Klugt, B.
      – PersonEntity:
          Name:
            NameFull: Adkins, N.J.
      – PersonEntity:
          Name:
            NameFull: Bakker, J.W.
      – PersonEntity:
          Name:
            NameFull: Nieuwenhuys, B.E.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 12
              M: 04
              Text: Apr2011
              Type: published
              Y: 2011
          Identifiers:
            – Type: issn-print
              Value: 09205861
          Numbering:
            – Type: volume
              Value: 163
            – Type: issue
              Value: 1
          Titles:
            – TitleFull: Catalysis Today
              Type: main
ResultId 1