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
    Theoretical evaluation of pillared clay adsorbents: Part I. The microporosity of Al- and Ti-pillared montmorillonite (1996)
    Springer
    Journal of porous materials 3 (1996), S. 47-59 
    Details
    ISSN: 1573-4854
    Keywords: theoretical calculations ; microporosity ; pillared clays ; adsorbents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Fillared clays have become a well known class of porous materials. Due to the versatile porosity they seem to be complementary to zeolites and can be very useful for adsorption and catalytic processes. Despite intensive research, real industrial applications are still lacking. Somehow, the porosity of these pillared clays is not what was expected. The present study reports theoretical calculations, based on simple geometrical models in combination with experimental data, in order to obtain a better insight in the PILC structure and its limiting factors. Parameters such as interpillar free distance and maximum micropore volume were calculated and compared to experimental or literature data. The final goal is to find out the potential of pillared clays as adsorbents to be used as substituents or complements for zeolites. This part reports calculations, in terms of microporosity, performed for two types of pillared clays having completely different porosity properties: Al- and Ti-PILC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01135361
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Theoretical evaluation of pillared clay adsorbents: Part III: The total porosity and the macrostructure of Al-pillared montmorillonite and hectorite (1996)
    Springer
    Journal of porous materials 3 (1996), S. 207-216 
    Details
    ISSN: 1573-4854
    Keywords: theoretical calculations ; total porosity ; macrostructure ; pillared clays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract As a new class of porous materials, pillared clays have been more and more investigated as a potential substituent or complement to zeolite materials. Despite of intensive research, real industrial applications are still lacking. Somehow, the porosity of these materials is lower than what was expected. To evaluate the potential of the pillared clays as adsorbent, theoretical calculations were carried out to obtain a better insight of the influence of the PILC's macrostructure on the micro- and mesoporosity. Assuming the layers to stack in a 3-dimensional brick-like fashion, the micro- and mesoporosity and interpillar free distance were calculated taking into account: the clay layer dimensions, interlayer free spacing, lateral distance between adjacent layers, partial pillaring/collapse and pillar symmetry. The calculations were performed for Al-pillared montmorillonite and hectorite and validated with experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01137909
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Theoretical evaluation of pillared clay adsorbents: Part II: Differences in porosity between Al-pillared laponite and hectorite (1996)
    Springer
    Journal of porous materials 3 (1996), S. 157-168 
    Details
    ISSN: 1573-4854
    Keywords: pillared clays ; laponite ; theoretical calculations ; microporosity ; macrostructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Pillared Clays are proposed as a new class of sorbents with properties which exceed those of zeolites. However, despite of intense research, the materials are still not used as substituents of zeolites. By the present study a better understanding of the potential and limiting factors of pillared clays is achieved by means of geometric models. These models take into account interlayer distance, pillar symmetry, collapse, partial pillaring, layer size and layer stacking. The results are evaluated on microporosity and interpillar distance and compared to experimental data. Because of the important contribution of mesopores to the pore volume of PILCs, a macrostructure in which the experimental mesopore volume has been approximated, is proposed. This paper reports the evaluation of two Al-pillared hectorites, natural and synthetic (laponite), having completely different macrostructures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01134027
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Theoretical evaluation of pillared clay adsorbents: Part IV: The microporosity of Fe- and mixed Fe-Zr-pillared montmorillonite (1996)
    Springer
    Journal of porous materials 3 (1996), S. 217-225 
    Details
    ISSN: 1573-4854
    Keywords: pillared clays ; montmorillonite ; theoretical calculations ; microporosity ; Fe-PILC ; Fe-Zr-PILC
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Pillared clays are proposed as a new class of sorbents with properties similar to zeolites. However, despite extensive research, zeolites have not yet been replaced by pillared clays for industrial applications. In the present study a better understanding of the potential and limiting factors of Fe and mixed Fe-Zr pillared clays is focused by theoretical modelling calculations including interlayer distance, pillar symmetry, collapse and partial pillaring. The results are evaluated on microporosity and interpillar distance and are compared to experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01137910
    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...