Book ChapterDOI
Catalytic properties of mesoporous crystalline MCM-41 and related materials forhydrocarbon cracking
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In this article, the catalytic properties of extra-large pore aluminosilicate MCM-41 and a silica-containingVPI-5 were investigated using n-hexadecane as a model feed and compared with the results obtained from a commercial FCC catalyst.Abstract:
The catalytic properties of extra-large pore aluminosilicate MCM-41 and a silica-containingVPI-5 were investigated by MAT ( M icro A ctivity T est) using n-hexadecane as a model feed and were then compared with the results obtained from a commercial FCC catalyst (FCC: F luid C atalytic C racking) It could be demonstrated that, by optimizing structural and chemical properties, the new mesoporous crystalline MCM-41 and related materials are suitable as active components in cracking catalysts for “deeper” cracking of high boilding hydrocarbonsread more
Citations
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Journal ArticleDOI
Composites of micro- and mesoporous materials: simultaneous syntheses of MFI/MCM-41 like phases by a mixed template approach
TL;DR: In situ formation of the micro and mesoporous structures MFI and MCM-41 was obtained using a two-template syntheses gel system [C6H13(CH3)3NBr and C14H29(CH 3 NBr] as discussed by the authors.
Journal ArticleDOI
New trends in the design of supported catalysts on mesoporous silicas and their applications in fine chemicals
TL;DR: Different strategies leading to the preparation of acid and base catalysts derived from ordered mesoporous silicas are reviewed in this paper, including aluminum incorporation into the silicate network, entrapping of heteropolyacids, deposition of oxide precursors and direct or post-synthesis of organic moieties.
Journal ArticleDOI
Acidity and Catalytic Behavior of Substituted MCM-48
TL;DR: Al-, Ga-, and Fe-MCM-48 molecular sieves were synthesized and characterized by XRD, TGA,29Si-,27Al-,71Ga-MAS NMR, EPR, TPDA, and FTIR spectroscopy as well as by microcalorimetry of ammonia as discussed by the authors.
Journal ArticleDOI
Synthesis of Mesostructured Lamellar Aluminophosphates Using Supramolecular Templates
Abdelhamid Sayari,and Igor L. Moudrakovski,Jale Sudhakar Reddy,Christopher I. Ratcliffe,and John A. Ripmeester,Keith F. Preston +5 more
TL;DR: In this article, a variety of lamellar AlPO4 phases with d spacings in the nanometer range were prepared in the presence of long-chain primary and tertiary amines.
Journal ArticleDOI
Comparison of mesoporous Al-MCM-41 molecular sieves in the production of p-cymene for isopropylation of toluene
Manickam Selvaraj,Arumugam Pandurangan,K. S. Seshadri,Pradeep Kumar Sinha,V. Krishnasamy,K. B. Lal +5 more
TL;DR: In this article, the mesoporous structure of Al-MCM-41 with Si/Al = 93 and 104 was characterized using several techniques and the surface area, pore size and wall thickness was calculated by BET equation and BJH method using nitrogen sorption technique.
References
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Journal ArticleDOI
Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism
TL;DR: In this paper, the synthesis of mesoporous inorganic solids from calcination of aluminosilicate gels in the presence of surfactants is described, in which the silicate material forms inorganic walls between ordered surfactant micelles.
Book ChapterDOI
Synthesis of Al-Containing MCM-41 Materials: Template Interaction and Removal
Ralf Schmidt,Ralf Schmidt,Duncan Akporiayea,Michael Stöcker,Ole Henrik Ellestad,Ole Henrik Ellestad +5 more
TL;DR: In this paper, XRD and HREM were used to characterize MCM-41 materials with bulk Si/A1 ratios of 18, 9 and 4 and having different pore sizes.
Journal ArticleDOI
The reversible transition of the molecular sieve VPI-5 into ALPO−84 and the structure of ALPO−84
TL;DR: In this paper, the authors describe the reversibility of the recrystallization of the aluminophosphate molecular sieve VPI-5 to ALPO{sub 4{sup {minus}8}.