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Zeolite exhibited in the Estonian Museum of Natural History. Zeolite is a group of several microporous, crystalline aluminosilicate minerals commonly used as commercial adsorbents and catalysts. [1] They mainly consist of silicon, aluminium, oxygen, and have the general formula M n+ 1/n (AlO 2) − (SiO 2) x ･y H 2 O where M n+ 1/n is either ...
Hypothetical zeolites are combinatorial models of potential structures of the minerals known as zeolites. They are four-regular periodic graphs, with vertices representing the tetrahedral atom (usually Si or Al) and the edges representing the bridging oxygen atoms. Alternatively, by ignoring the tetrahedral atoms, zeolites can be represented by ...
Framework structure of SSZ-13 with CHA topology. SSZ-13 (framework type code CHA) is a high-silica aluminosilicate zeolite possessing 0.38 × 0.38 nm micropores. [1] It belongs to the ABC-6 family of zeolites as well as offretite, cancrinite, erionite and other related small-pore zeolites. [2]
Mordenite is a zeolite mineral with the chemical formula (Na 2,Ca,K 2) 4 (Al 8 Si 40)O 96 ·28H 2 O. and it is one of the six most abundant zeolites and is used commercially. [3] It was first described in 1864 by Henry How. He named it after the small community of Morden, Nova Scotia, Canada, along the Bay of Fundy, where it was first found.
Zeolites are known to have tunable pores – ranging between 3-12 Angstroms – which allows them to separate carbon dioxide. Because a molecule is about 5.4 Angstroms in length, zeolites with a pore size of 4-5 Angstroms can be well-suited for carbon dioxide capture. However, other factors also need to be considered when determining how ...
Finally, the International Zeolite Association (IZA) took care of the zeolite frameworks (part of molecular sieves and/or molecular cages). There are only a few thousand mineral species and 83 geochemically stable chemical elements combine to form them (84 elements, if plutonium and the Atomic Age are included). [ 1 ]
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Clinoptilolite is a natural zeolite composed of a microporous arrangement of silica and alumina tetrahedra. It has the complex formula (Na,K,Ca) 2–3 Al 3 (Al,Si) 2 Si 13 O 36 •12H