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Titolo:
CHARACTERIZATION AND CO2 ADSORPTIVITY OF ACID-WASHED AND CATION-EXCHANGED NATURAL MORDENITES
Autore:
WANG ZM; KUMAGAI M; TAMURA T; TAKASHIMA Y;
Indirizzi:
INST RES & INNOVAT,KASHIWA LAB,DIV CHEM RES,TAKADA 1201 KASHIWA CHIBA277 JAPAN
Titolo Testata:
Journal of colloid and interface science
fascicolo: 2, volume: 193, anno: 1997,
pagine: 300 - 306
SICI:
0021-9797(1997)193:2<300:CACAOA>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVATED CARBON-FIBERS; NO;
Keywords:
NATURAL MORDENITE; ACID WASHING; CATION-EXCHANGE; CAVITY CHANGE; METAL IONIC SITE, CO2 ADSORPTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
Z.M. Wang et al., "CHARACTERIZATION AND CO2 ADSORPTIVITY OF ACID-WASHED AND CATION-EXCHANGED NATURAL MORDENITES", Journal of colloid and interface science, 193(2), 1997, pp. 300-306

Abstract

A Japanese natural mordenite was modified by acid washing as well as cation-exchange. Crystal structure, porosity, and active sites of the modified natural mordenites were characterized, and their CO2 adsorptivity were examined. Contraction as well as expansion of the mordeniticunit cell in the natural zeolite and distortion of zeolite structure by acid washing are plausibly shown by XRD, Long-term washing by nitric acid induces enlargement of micropore volume, increasing the micropore dimension but decreasing the large pore dimension over the mesoporous range. The degree of dehydration has an important role in CO2 adsorption, Metal ionic sites affect both the irreversible CO2 adsorption and the CO2 equilibrium adsorption at low concentration, Li+ ion-exchange brings about a great CO2 adsorption but reduces the CO2-surface interaction due to molecular size effect. Ca2+ ion-exchange has its main effect in the enhancement of CO2 desorption energy. (C) 1997 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 10:44:07