Adsorption Characteristics of Natural Erionite, Clinoptilolite and Mordenite Zeolites from Mexico

Authors: Hernáandez M.A.¹; Corona L.²; Rojas F.³

Source: Adsorption, Volume 6, Number 1, January 2000 , pp. 33-45(13)

Publisher: Springer

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Abstract:

Nitrogen sorption properties inherent to some natural zeolites from Mexico, such as erionites, clinoptilolites and mordenites, are determined and compared with corresponding sorption properties of homologous synthetic or acid modified forms. The mineralogies of natural zeolites are determined by X-ray analysis. N_2 low-pressure hysteresis loops are displayed by some substrata while are absent in others; key factors for this phenomenon to occur are the micropore structure and the ion-exchange treatment to which the natural precursors are subjected. Argon sorption at 76 K on selected samples evidence further the strong adsorption and the pore blocking effects at pore necks in the zeolites.

Keywords: natural zeolites; erionite; clinoptilolite; mordenite; low-pressure hysteresis

Language: English

Document Type: Regular paper

Affiliations: 1: Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, P.O. Box 55-534, México 09340 D.F., México;Centro de Química (Ingeniería Química), Instituto de Ciencias, Universidad Autónoma de Puebla, Edif. 76, Complejo de Ciencias, Puebla 72570, México;Posgrado de Ciencias Ambientales, Instituto de Ciencias, Universidad Autónoma de Puebla, Puebla 72570, México 2: Centro de Química (Ingeniería Química), Instituto de Ciencias, Universidad Autónoma de Puebla, Edif. 76, Complejo de Ciencias, Puebla 72570, México 3: Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, P.O. Box 55-534, México 09340 D.F., México

Publication date: 2000-01-01