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SSZ-13 (framework type code CHA) is an aluminosilicate zeolite mineral possessing 0.38 × 0.38 nm micropores.〔Baerlocher, Ch.; McCusker, L.B..; Olson, D.H. Atlas of Zeolite framework Types, Elsevier, Amsterdam, 6th edn., 2007, see also: http://www.iza-structure.org/databases/.〕 It belongs to the ABC-6 family of zeolites as well as offretite, cancrinite, erionite and other related minerals.〔G.R. Millward, S. Ramdas, J.M. Thomas, ''Proc. R. Soc. Lond.'' A, 399, 57 (1985)〕 The framework topology is the same as that of chabazite but SSZ-13 has high-silica composition with Si/Al > 5 which leads to low cation exchange capacity. The typical chemical formula of the unit cell can be described as Q''x''Na''y''Al2.4Si33.6O72•''z''H2O (1.4 < ''x'' <27)(0.7 < ''y'' < 4.3)(1 < ''z'' <7), where Q is ''N'',''N'',''N''-1-trimethyladamantammonium.〔 The material was patented by Chevron research Company in 1985,〔Zones, S.I. ''US Patent 4 544 538'', 1985,〕 and has a potential use as a solid catalyst for the methanol-to-olefins (MTO) process and the selective catalytic reduction (SCR) of NOx. ==Synthesis== SSZ-13 can be synthesized from the following method.〔Robson, H., Lillerud, K.P. (2001). ''Verified Synthesis of Zeolitic Materials''. Elsevier. ISBN 0-444-50703-5〕 The material is synthesized from the following batch composition: 10 Na2 : 2.5 Al2O3 : 100 SiO2 : 4400 H2O : 20 QOH. 2 g 1N NaOH, 2,78 g 0.72 M ''N'',''N'',''N''-1-trimethyladamantammonium hydroxide (QOH) and 3.22 g deionized water are mixed. 0,1 g Al2O3 is added to the solution and mixed with 0.6 g fumed silica. The resulting viscous gel is aged for two hours and heated for 4 days at 160oC in a teflon lined steel autoclave. The crystallized product can be recovered by filtration. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SSZ-13」の詳細全文を読む スポンサード リンク
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