Time-resolved operando DRIFTS-MS study of the moisture tolerance of small-pore SAPO-34 molecular sieves during CH4/CO2 separation

descriptionPublicationkeyboard_double_arrow_right Article 01 May 2020 Spain English Publisher:Elsevier BVJournal:Microporous and Mesoporous Materials, volume 298, page 110,071 (issn: 1387-1811,

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Authors: Romero, Marta; Navarro de Miguel, Juan Carlos; Bobadilla Baladrón, Luis Francisco; Domínguez Leal, María Isabel; Ivanova, Svetlana; Romero Sarria, Francisca; Centeno Gallego, Miguel Ángel; +1 Authors

doi: 10.1016/j.micromeso.2020.110071

handle: 11441/142646 , 10261/216791

Time-resolved operando DRIFTS-MS study of the moisture tolerance of small-pore SAPO-34 molecular sieves during CH4/CO2 separation

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Abstract

This study pretends to evaluate and understand the effect of moisture presence during CO2/CH4 separation on small-pore SAPO-34 molecular sieves. Two SAPO-34 samples with different physicochemical properties (composition, crystal size and texture) were prepared by hydrothermal synthesis using either one or a mixture of two templates. Transient operando DRIFTS-MS measurements revealed that the sample's hydrophobic character is associated to the presence of Si islands, which enhanced sample's moisture tolerance during repetitive adsorption/desorption cycles. This knowledge is fundamental to achieve the rational design of efficient SAPO-34 membranes under realistic conditions.

Ministerio de Ciencia, Innovación y Universidades RTI2018-096294-B-C33

Gobierno de España IJCI-2015-26348

Country

Spain

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Keywords

CO2/CH4 separation, Moisture tolerance, SAPO-34, Operando DRIFTS-MS, Operando DRIFTS

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