0181470 - UFCH-W 20020138 RIV NL eng C - Conference Paper (international conference)
Čejka, Jiří - Košová, Gabriela - Žilková, Naděžda - Hrubá, I.
(Al) ZSM-12: Synthesis and Modification of Acid Sites.
Impact of Zeolites and Other Porous Materials on the New Technologies at the Beginning of the New Millennium. Amsterdam: Elsevier, 2002 - (Aiello, R.; Giordano, G.; Testa, F.), s. 247-254. Studies in Surface Science and Catalysis., 142 A.
[International FEZA Conference /2./. Taormina (IT), 01.09.2002-05.09.2002]
R&D Projects: GA AV ČR IAA4040001; GA AV ČR IBS4040017
Institutional research plan: CEZ:AV0Z4040901
Keywords : zeolite * Al-ZSM-12 * synthesis
Subject RIV: CF - Physical ; Theoretical Chemistry

Zeolite (Al)-ZSM-12 was synthesised in a broad range of Si/Al ratio using methyltriethylammonium bromide as structure-directing agent with aim to characterize the type and concentration of acid sites in dependence on Si/Al ratio and calcinations procedure. The highest concentration of Broensted sites particularly at lower Si/Al rations was achieved via calcinations of (Al)-ZSM-12 in a stream of ammonia followed by a repeated sodium ion exchanged and further calcinations in a stream of air.
Permanent Link: http://hdl.handle.net/11104/0078034