SSZ-13

SSZ-13 (framework type code CHA) is a high-silica <a href="/facts/Aluminosilicate/3gclsh2j">aluminosilicate</a> <a href="/facts/Zeolite/SNrXy4v2">zeolite</a> possessing 0.38 × 0.38 nm micropores. It belongs to the ABC-6 family of zeolites as well as offretite, <a href="/facts/Cancrinite/LH26AR52">cancrinite</a>, <a href="/facts/Erionite/H69RTE6T">erionite</a> and other related small-pore zeolites. The framework topology is the same as that of <a href="/facts/Chabazite/kfXL9LwD">chabazite</a> but SSZ-13 has a high silica composition with Si/Al > 5, which leads to low cation exchange capacity. The typical <a href="/facts/Chemical_formula/hghUtthl">chemical formula</a> of the unit cell can be described as QxNayAl2.4Si33.6O72•zH2O (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 <a href="/facts/Chevron_Corporation/c4sF7R9s">Chevron</a> research Company in 1985, and could potentially be used as a solid catalyst for the <a href="/facts/Methanol/EIfpoNCg">methanol</a>-to-<a href="/facts/Olefins/RtYcS6kU">olefins</a> (MTO) process and the <a href="/facts/Selective_catalytic_reduction/UU2bgnrB">selective catalytic reduction</a> (SCR) of NOx.

SSZ-13 open-in-new

SSZ-13