Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    129Xe-NMR study of coke distribution in dealuminated HY zeolites (1990)
    Springer
    Catalysis letters 5 (1990), S. 143-154 
    Details
    ISSN: 1572-879X
    Keywords: NMR ; xenon ; coke ; zeolite ; extra-framework aluminium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Zeolites coking has been studied by129Xe-NMR technique. The distribution of the coke is heterogeneous on the supercage surface at low cokage level. When coking increases up to 10% the supercages are lined with coke and the residual internal volume consists of narrow channels. Beyond 10% the coke also affects the external surface of the zeolites, with the formation of coke microcavities between the crystallites. This technique has also enabled us to show the role of extra-framework Al in the cracking activity of zeolites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00763946
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Preparation of nanometeric gold particles on NaHY (1996)
    Springer
    Catalysis letters 41 (1996), S. 143-148 
    Details
    ISSN: 1572-879X
    Keywords: gold particles ; zeolite ; TEM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Two Au/NaHY systems examined by TEM were prepared using an autoreduction method of Au3+ by its ethylene diamine ligands. When about 10% of the cations are H+ the particle diameter distribution is found to be about 2 nm and homogeneous. If 75% of cations are H+ the gold particle distribution is centered around 3–4 nm. Gold particles are of good stability when exposed to H2 at 573 K for two days and the stability under O2 greater with the higher acidified zeolite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811481
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...