Fe-pillared clays: a combination of zeolite shape selectivity and iron activity in the CO hydrogenation reaction

✍ Scribed by M.Josefina Pérez Zurita; Gerardo Vitale; Mireya R. de Goldwasser; Daysi Rojas; Juan J. García

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 679 KB
• Volume: 107
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/1381-1169(95)00218-9

✦ Synopsis

Fe-pillared clays (Fe-PILC) were prepared by the standard method using the complex [Fe3(CH3COO)7OH • 2H20] + NO~ as iron precursor. The temperature, time and iron concentration were varied during the exchange process. A thorough characterisation was carried out using XRD, textural properties, chemical analysis, scanning electron microscopy and M~ssbauer spectroscopy as main techniques. The Fe-pillared clays synthesized attained remarkable thermal stability in N 2 and air (700°C), surface areas between 200 and 270 m 2 g-~ and basal spacing of around 21 ~, when dried at room temperature. The high thermal stability reached with these solids limited the catalytic activity. However, this unwanted control of activity renders the solids selective towards the C:-C 4 fraction of products in the CO hydrogenation reaction. Up to now, the use of Fe-pillared clays in this reaction is only found in the patent literature. The present work seeks to shed light on the behaviour of this type of solids in this reaction.