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Titolo:
Surface area, pore size distribution and microstructure of combustion engine deposits
Autore:
Zerda, TW; Yuan, X; Moore, SM; Leon, CALY;
Indirizzi:
Texas Christian Univ, Dept Phys, Ft Worth, TX 76129 USA Texas Christian Univ Ft Worth TX USA 76129 t Phys, Ft Worth, TX 76129 USA Chevron Chem Co, Richmond, CA 94802 USA Chevron Chem Co Richmond CA USA 94802 ron Chem Co, Richmond, CA 94802 USA Quantachrome Corp, Boynton Beach, FL 33426 USA Quantachrome Corp Boynton Beach FL USA 33426 Boynton Beach, FL 33426 USA
Titolo Testata:
CARBON
fascicolo: 12, volume: 37, anno: 1999,
pagine: 1999 - 2009
SICI:
0008-6223(1999)37:12<1999:SAPSDA>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ADSORPTION; CARBONS;
Keywords:
soot; combustion; adsorption; surface areas, microstructure;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Zerda, TW Texas Christian Univ, Dept Phys, POB 298840, Ft Worth, TX 76129 USA Texas Christian Univ POB 298840 Ft Worth TX USA 76129 76129 USA
Citazione:
T.W. Zerda et al., "Surface area, pore size distribution and microstructure of combustion engine deposits", CARBON, 37(12), 1999, pp. 1999-2009

Abstract

The structural characteristics of combustion engine deposits produced fromfuels with 22-44% aromatics by volume have been studied using Raman spectroscopy and gas sorption techniques. The lateral sizes of graphitic crystallites were found to increase slightly with the aromatic content of the fuel used. The surface areas of the deposits were evaluated using the BET and DRtheories. Density functional theory (DFT) and mercury porosimetry were used to evaluate pore size distributions. The deposits have large internal surface areas (in the approximate range 110-300 m(2)/g) and their structures are highly porous. The average pore sizes of the largely microporous deposits do not depend on the aromatic content of the precursor fuel. Walls of pores with widths of about 0.5 nm are primarily responsible for the majority of the internal surface area found in the deposits. Heat treatment at temperatures above 573 K results in increased surface areas because the release of small hydrocarbon fragments from the deposits opens pores which were not accessible following heat treatment at lower temperatures. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 06:38:58