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Title: Advanced coal liquefaction. Final project report

Abstract

Molecular level liquid phase separation was explored using modified microporous ceramic membranes with pore size reduced from 40{Angstrom} via chemical vapor deposition. At room temperature, membranes with pore sizes <30{Angstrom} were sufficient to achieve >97% rejection of naphthyl-bibenzyl-methane (NBBM) in toluene, likely attributed to the hindrance effect of NBBM through the porous avenue of the membrane. The rejection diminished dramatically as the temperature was increased. The permeance of the mixture was substantially lower than that of the solvent resulted from the interference by the solute through the transport avenue. Also, it was found that the rejection increases along with the transmembrane pressure increase, probably attributed to the pore size distribution of the membrane. The smaller pore sizes become accessible to the solvent while rejecting the solute at the higher pressure. In addition to size-based separation, active transport of molecules through an appropriate pore size at 300-400{degrees}C was observed, as a result of interaction with the surface. Decomposition of NBBM took place at 400{degrees}C in a modified membrane packed with the catalyst synthesized using the similar protocol as membranes. The separation property of this membrane at 400{degrees}C was analyzed indirectly based upon the reaction product distribution.

Publication Date:
Research Org.:
Media and Process Technology, Inc., Pittsburgh, PA (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
OSTI Identifier:
477731
Report Number(s):
DOE/PC/92120-T13
ON: DE97052393; TRN: 97:003520
DOE Contract Number:  
AC22-93PC92120
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 2 Dec 1996
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 36 MATERIALS SCIENCE; ALUMINIUM OXIDES; PORE STRUCTURE; COAL LIQUEFACTION; MEMBRANES; BIBENZYL; METHANE; ASPHALTENES; PERMEABILITY; TOLUENE; TETRALIN; SEPARATION PROCESSES; LIQUIDS

Citation Formats

. Advanced coal liquefaction. Final project report. United States: N. p., 1996. Web. doi:10.2172/477731.
. Advanced coal liquefaction. Final project report. United States. https://doi.org/10.2172/477731
. 1996. "Advanced coal liquefaction. Final project report". United States. https://doi.org/10.2172/477731. https://www.osti.gov/servlets/purl/477731.
@article{osti_477731,
title = {Advanced coal liquefaction. Final project report},
author = {},
abstractNote = {Molecular level liquid phase separation was explored using modified microporous ceramic membranes with pore size reduced from 40{Angstrom} via chemical vapor deposition. At room temperature, membranes with pore sizes <30{Angstrom} were sufficient to achieve >97% rejection of naphthyl-bibenzyl-methane (NBBM) in toluene, likely attributed to the hindrance effect of NBBM through the porous avenue of the membrane. The rejection diminished dramatically as the temperature was increased. The permeance of the mixture was substantially lower than that of the solvent resulted from the interference by the solute through the transport avenue. Also, it was found that the rejection increases along with the transmembrane pressure increase, probably attributed to the pore size distribution of the membrane. The smaller pore sizes become accessible to the solvent while rejecting the solute at the higher pressure. In addition to size-based separation, active transport of molecules through an appropriate pore size at 300-400{degrees}C was observed, as a result of interaction with the surface. Decomposition of NBBM took place at 400{degrees}C in a modified membrane packed with the catalyst synthesized using the similar protocol as membranes. The separation property of this membrane at 400{degrees}C was analyzed indirectly based upon the reaction product distribution.},
doi = {10.2172/477731},
url = {https://www.osti.gov/biblio/477731}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Dec 02 00:00:00 EST 1996},
month = {Mon Dec 02 00:00:00 EST 1996}
}