Ferrierite zeolitic thin-layer on cordierite honeycomb support by clear solutions

• FER type zeolitic layer has been obtained for the first time by clear solutions using ethylenediamine as structure direct agent.
• The layers obtained are firmly attached on support because the in situ synthesis method allows a chemical bonding between the support and the zeolitic layer.
• Post-synthesis thermal treatments of zeolitic layer can affect its surface homogeneity, thus influencing the permeability of single gas, such as H2, N2, and C3H8.

Ferrierite type (FER) zeolite layers have been successfully synthesized on a porous cordierite support from clear solutions, using ethylenediamine as structure directing agent. The use of a clear solution avoids the support channel plugging and promotes a stable and homogeneous zeolitic layer, without any pre-treatments of the support surface. The amount of deposited zeolite has been quantified by the increasing weight of the sample and it is around 70% and calculated layer thickness value is 23 µm. The adherence of zeolite layer has been evaluated measuring the weight losses of samples, caused by exposing them to repeated air flows and heating cycles. The different post-synthesis thermal treatments affect the homogeneity of the zeolitic layer.

Graphical AbstractPure FER-zeolite layer on porous cordierite, with high support coverage, high surface homogeneity and strong adhesion, has been obtained by clear solution.Figure optionsDownload as PowerPoint slide