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Title: Mesoporous synthetic clays : synthesis, characterization, and use as HDS catalyst supports.

Abstract

Mesoporous synthetic clays (MSCs) are obtained when polymer-containing silicate gels are hydrothermally crystallized to form layered magnesium silicate hectorite clays containing polymers that are incorporated in situ. Polyvinylpyrrolidone of several average molecular weights ranging from 10K to 1.3M, in gel loadings varying from 5-30 wt%, were used. The organic polymer template molecules were removed from synthetic polymer-clay complexes via calcination. Pore radii, surface areas, and pore volumes of the resulting porous inorganic networks were then measured. For the most part there is a direct correlation between both PVP molecular weight and polymer loading on the diameter of the average pore. In addition to conventional techniques, the polymer-clay materials were also characterized by small angle x-ray scattering to ascertain the disposition of the polymeric matrix. The MSC materials after calcination were examined as potential supports for hydrodesulfurization (HDS). They were loaded with a bimetallic Co/Mo catalyst system for comparison with a commercial Co/Mo alumina catalyst. Dibenzothiophene (DBT) diluted with hexadecane (0.75 wt% S) was utilized as a liquid feed for the HDS tests. This feed was chosen as a deep HDS test of a heavy model oil. The pore diameters of the MSC catalysts were found to have a strong effectmore » on both the HDS activity and selectivity.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
11853
Report Number(s):
ANL/CHM/CP-99251
TRN: AH200118%%243
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: Access in Nanoporous Materials II Symposium, Banff, Alberta (CA), 05/25/2000--05/28/2000; Other Information: PBD: 10 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; CATALYST SUPPORTS; SYNTHETIC MATERIALS; CLAYS; MAGNESIUM SILICATES; MOLECULAR WEIGHT; MONTMORILLONITE; ORGANIC POLYMERS; SURFACE AREA; SYNTHESIS; DESULFURIZATION; HYDROGENATION; COBALT; MOLYBDENUM; PETROLEUM; VISCOSITY

Citation Formats

Bloomquist, C. A. A., Carrado, K. A., Marshall, C. L., Seifert, S., Wei, D., and Xu, L. Mesoporous synthetic clays : synthesis, characterization, and use as HDS catalyst supports.. United States: N. p., 1999. Web.
Bloomquist, C. A. A., Carrado, K. A., Marshall, C. L., Seifert, S., Wei, D., & Xu, L. Mesoporous synthetic clays : synthesis, characterization, and use as HDS catalyst supports.. United States.
Bloomquist, C. A. A., Carrado, K. A., Marshall, C. L., Seifert, S., Wei, D., and Xu, L. Tue . "Mesoporous synthetic clays : synthesis, characterization, and use as HDS catalyst supports.". United States. https://www.osti.gov/servlets/purl/11853.
@article{osti_11853,
title = {Mesoporous synthetic clays : synthesis, characterization, and use as HDS catalyst supports.},
author = {Bloomquist, C. A. A. and Carrado, K. A. and Marshall, C. L. and Seifert, S. and Wei, D. and Xu, L.},
abstractNote = {Mesoporous synthetic clays (MSCs) are obtained when polymer-containing silicate gels are hydrothermally crystallized to form layered magnesium silicate hectorite clays containing polymers that are incorporated in situ. Polyvinylpyrrolidone of several average molecular weights ranging from 10K to 1.3M, in gel loadings varying from 5-30 wt%, were used. The organic polymer template molecules were removed from synthetic polymer-clay complexes via calcination. Pore radii, surface areas, and pore volumes of the resulting porous inorganic networks were then measured. For the most part there is a direct correlation between both PVP molecular weight and polymer loading on the diameter of the average pore. In addition to conventional techniques, the polymer-clay materials were also characterized by small angle x-ray scattering to ascertain the disposition of the polymeric matrix. The MSC materials after calcination were examined as potential supports for hydrodesulfurization (HDS). They were loaded with a bimetallic Co/Mo catalyst system for comparison with a commercial Co/Mo alumina catalyst. Dibenzothiophene (DBT) diluted with hexadecane (0.75 wt% S) was utilized as a liquid feed for the HDS tests. This feed was chosen as a deep HDS test of a heavy model oil. The pore diameters of the MSC catalysts were found to have a strong effect on both the HDS activity and selectivity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}

Conference:
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