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Determination of the acidity of MCM-41 with different Si/Al ratios by the temperature programmed desorption of pyridine

Publicated to:Adsorption Science & Technology. 25 (10): 751-756 - 2007-01-01 25(10), DOI: 10.1260/026361707785284220

Authors: Souza, Marcelo J B; Lima, Stevie H; Araujo, Antonio S; Garrido Pedrosa, Anne M; Coutinho, Ana C S L S

Affiliations

Univ Fed Rio Grande do Norte, Dept Chem, BR-59078970 Natal, RN, Brazil - Author
Univ Fed Sergipe, Dept Chem Engn, BR-49100000 Sao Cristovao, SE, Brazil - Author

Abstract

Mesoporous catalysts of MCM-41 type with different Si/Al ratios were synthesized by the hydrothermal method and characterized by X-ray diffraction, nitrogen adsorption and thermogravimetric analysis. Their acidic properties were determined via the temperature programmed desorption of pyridine. Vyazovkin kinetic models were used to correlate the total acidity as a function of the Si/Al ratio with the apparent activation energy for pyridine desorption. The results obtained indicated that the catalysts possessed weak and medium acidic sites. An increase in the Si/Al ratio led to an increase in the activation energy for pyridine desorption.

Keywords

AdsorptionMesoporous molecular-sievesRemovalZeolite

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Adsorption Science & Technology due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2007, it was in position , thus managing to position itself as a Q2 (Segundo Cuartil), in the category Chemical Engineering (Miscellaneous). Notably, the journal is positioned en el Cuartil Q4 for the agency WoS (JCR) in the category Engineering, Chemical.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-18:

  • WoS: 3
  • Scopus: 4
  • OpenCitations: 4

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-18:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 8 (PlumX).

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Brazil.