ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
Filter
  • MECHANICAL ENGINEERING  (1)
  • hydrogen chemisorption  (1)
Collection
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Abnormally large deuterium uptake on small transition metal clusters (1990)
    Springer
    Catalysis letters 4 (1990), S. 271-278 
    Details
    ISSN: 1572-879X
    Keywords: Transition metal clusters ; hydrogen chemisorption ; deuterium chemisorption ; platinum ; rhodium ; nickel ; palladium ; catalysts ; hydrogen(deuterium) saturation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Deuterium uptake experiments on gas phase transition metal cluster cations of Ni, Pt and Rh show that the small (〈 10 Å dia.) clusters can bind many (up to 8) deuterium atoms per metal atom in the cluster, in contast to (H(D)/M)max ratios near unity typically reported for single crystal metal surfaces and in previous uptake experiments on nickel and iron clusters [11]. Abnormally large (H(D)/M)max ratios appear to be the rule rather than the exception for small transition metal clusters, an effect which has strong implications in chemical and catalytic processes involving hydrogen chemisorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00765311
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Aerodynamic performance of conventional and advanced design labyrinth seals with solid-smooth abradable, and honeycomb lands (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Labyrinth air seal static and dynamic performance was evaluated using solid, abradable, and honeycomb lands with standard and advanced seal designs. The effects on leakage of land surface roughness, abradable land porosity, rub grooves in abradable lands, and honeycomb land cell size and depth were studied using a standard labyrinth seal. The effects of rotation on the optimum seal knife pitch were also investigated. Selected geometric and aerodynamic parameters for an advanced seal design were evaluated to derive an optimized performance configuration. The rotational energy requirements were also measured to determine the inherent friction and pumping energy absorbed by the various seal knife and land configurations tested in order to properly assess the net seal system performance level. Results indicate that: (1) seal leakage can be significantly affected with honeycomb or abradable lands; (2) rotational energy absorption does not vary significantly with the use of a solid-smooth, an abradable, or a honeycomb land; and (3) optimization of an advanced lab seal design produced a configuration that had leakage 25% below a conventional stepped seal.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-CR-135307 , EDR-9339
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...