Number of the records: 1
Alkaline Modification of MCM-22 to a 3D Interconnected Pore System and its Application in Toluene Disproportionation and Alkylation
- 1.
SYSNO ASEP 0327364 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Alkaline Modification of MCM-22 to a 3D Interconnected Pore System and its Application in Toluene Disproportionation and Alkylation Title Modifikace zeolitu HMCM-22 v alkalickém prostředí v systému 3D vzájemného propojení pórů a její aplikace v disproporcionací a alkylací toluenu Author(s) van Miltenburg, A. (NO)
Pawlesa, Justyna (UFCH-W)
Bouzga, A. M. (NO)
Žilková, Naděžda (UFCH-W) RID, ORCID
Čejka, Jiří (UFCH-W) RID, ORCID, SAI
Stöcker, M. (NO)Source Title Topics in Catalysis. - : Springer - ISSN 1022-5528
Roč. 52, č. 9 (2009), s. 1190-1202Number of pages 13 s. Language eng - English Country NL - Netherlands Keywords desilication ; mosepores ; MWW ; 29Si MAS-NMR Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA203/08/0604 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000267593900007 DOI 10.1007/s11244-009-9278-1 Annotation Modification of HMCM-22 zeolite by alkaline treatment was investigated by various characterization techniques and in toluene disproportionation and alkylation with isopropyl alcohol. This 'desilication' process led for mild alkaline concentrations (similar to 0.10-0.20 M NaOH at 323 K for 45 min) to the partial destruction of the zeolite framework, but also to the formation of additional mesoporosity. Furthermore, the accessibility/availability of Lewis acid sites, investigated by d (3)-acetonitrile and pyridine adsorption using FTIR spectroscopy, increased for these mild alkaline treatments, while the Bronsted acidity decreased. Higher alkaline concentrations (up to 0.50 M NaOH) led to a too severe framework and pore destruction and a decrease of both the Lewis and Bronsted acid site concentration. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2010
Number of the records: 1