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Title: Synthesis and Characterization of a New Microporous Material. 1. Structure of Aluminophosphate EMM-3

Abstract

Molecular sieves are extensively used in the chemical and petrochemical industry as catalysts, absorbents, and ion exchangers. New molecular sieve structures have the potential to improve the performance of these materials. We have discovered a new microporous material, EMM-3, prepared in both aluminophosphate and silicoaluminophosphate compositions by use of N,N,N,N{prime},N{prime},N{prime}-hexamethyl-1,6-hexanediammonium as a template at 160 C in 20 h. The structure of EMM-3 has been solved and refined from powder data by use of synchrotron X-ray radiation. The unit cell for the calcined AlPO form of EMM-3 has monoclinic space group symmetry, I2/m11, with cell dimensions a = 10.3132(2), b = 12.6975(3), and c = 21.8660(4) and {alpha}= 89.656(1). The microporous structure contains 12-ring, sinusoidal, unidimensional channels with pore openings of 6.1 x 6.5 Angstroms. This new framework contains two new building chains, not observed in other known framework structures. The {sup 31}P and {sup 27}Al NMR spectra of the calcined/dehydrated form are in agreement with a fully connected tetrahedral structure containing five unique phosphorus and five unique aluminum atoms. The material is stable upon calcination and absorbs 9-10 wt % hydrocarbons.

Authors:
; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
914184
Report Number(s):
BNL-78752-2007-JA
Journal ID: ISSN 0897-4756; CMATEX; TRN: US200804%%582
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chem. Mater.; Journal Volume: 18
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; ABSORBENTS; ALUMINIUM; ATOMS; CALCINATION; CATALYSTS; HYDROCARBONS; MOLECULAR SIEVES; NMR SPECTRA; OPENINGS; PERFORMANCE; PETROCHEMICALS; PHOSPHORUS; SPACE GROUPS; SYMMETRY; SYNTHESIS; national synchrotron light source

Citation Formats

Afeworki,M., Dorset, D., Kennedy, G., and Strohmaier, K.. Synthesis and Characterization of a New Microporous Material. 1. Structure of Aluminophosphate EMM-3. United States: N. p., 2006. Web. doi:10.1021/cm052174r.
Afeworki,M., Dorset, D., Kennedy, G., & Strohmaier, K.. Synthesis and Characterization of a New Microporous Material. 1. Structure of Aluminophosphate EMM-3. United States. doi:10.1021/cm052174r.
Afeworki,M., Dorset, D., Kennedy, G., and Strohmaier, K.. Sun . "Synthesis and Characterization of a New Microporous Material. 1. Structure of Aluminophosphate EMM-3". United States. doi:10.1021/cm052174r.
@article{osti_914184,
title = {Synthesis and Characterization of a New Microporous Material. 1. Structure of Aluminophosphate EMM-3},
author = {Afeworki,M. and Dorset, D. and Kennedy, G. and Strohmaier, K.},
abstractNote = {Molecular sieves are extensively used in the chemical and petrochemical industry as catalysts, absorbents, and ion exchangers. New molecular sieve structures have the potential to improve the performance of these materials. We have discovered a new microporous material, EMM-3, prepared in both aluminophosphate and silicoaluminophosphate compositions by use of N,N,N,N{prime},N{prime},N{prime}-hexamethyl-1,6-hexanediammonium as a template at 160 C in 20 h. The structure of EMM-3 has been solved and refined from powder data by use of synchrotron X-ray radiation. The unit cell for the calcined AlPO form of EMM-3 has monoclinic space group symmetry, I2/m11, with cell dimensions a = 10.3132(2), b = 12.6975(3), and c = 21.8660(4) and {alpha}= 89.656(1). The microporous structure contains 12-ring, sinusoidal, unidimensional channels with pore openings of 6.1 x 6.5 Angstroms. This new framework contains two new building chains, not observed in other known framework structures. The {sup 31}P and {sup 27}Al NMR spectra of the calcined/dehydrated form are in agreement with a fully connected tetrahedral structure containing five unique phosphorus and five unique aluminum atoms. The material is stable upon calcination and absorbs 9-10 wt % hydrocarbons.},
doi = {10.1021/cm052174r},
journal = {Chem. Mater.},
number = ,
volume = 18,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}