Home
Resources
Publications
Fast Room Temperature Lability of Aluminosilicate Zeolites

Fast Room Temperature Lability of Aluminosilicate Zeolites

Christopher J Heard, Lukas Grajciar, Cameron M Rice, Suzi M Pugh, Petr Nachtigall, Sharon E Ashbrook, Russell E Morris

Nat Commun. 2019 Oct 16;10(1):4690.

PMID: 31619677

Abstract:

Aluminosilicate zeolites are traditionally used in high-temperature applications at low water vapour pressures where the zeolite framework is generally considered to be stable and static. Increasingly, zeolites are being considered for applications under milder aqueous conditions. However, it has not yet been established how neutral liquid water at mild conditions affects the stability of the zeolite framework. Here, we show that covalent bonds in the zeolite chabazite (CHA) are labile when in contact with neutral liquid water, which leads to partial but fully reversible hydrolysis without framework degradation. We present ab initio calculations that predict novel, energetically viable reaction mechanisms by which Al-O and Si-O bonds rapidly and reversibly break at 300 K. By means of solid-state NMR, we confirm this prediction, demonstrating that isotopic substitution of 17O in the zeolitic framework occurs at room temperature in less than one hour of contact with enriched water.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76536	Aluminosilicate			Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: