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Sorpcione i kristalografske karakteristike alumine dobijene u reaktoru za pneumatski transport čestica

dc.creatorRožić, Ljiljana
dc.creatorNovaković, Tatjana
dc.creatorPetrović, Srđan
dc.creatorČupić, Željko
dc.creatorGrbavčić, Željko
dc.creatorRosić, Aleksandar
dc.date.accessioned2019-01-30T17:14:10Z
dc.date.available2019-01-30T17:14:10Z
dc.date.issued2006
dc.identifier.issn0352-5139
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/247
dc.description.abstractActive transition alumina powders were obtained by flash calcination of gibbsite in a reactor for pneumatic transport in the dilute, two-phase flow regime in the temperature interval from 883 to 943 K with a residence time between 0.4 and 0.9 s. The results of X-ray diffraction analysis confirmed that the activated alumina samples were either microcrystalline or amorphous. From nitrogen adsorption-desorption isotherms, the specific surface areas of all samples were calculated by the BET method. Using the sorption data, the fractal dimension of the surface of the alumina samples was calculated according to a modified FHH method. By application of fractal geometry, using the values of the fractal dimension of the surface and of the specific surface area, the effective surface areas of the active aluminas were calculated for the adsorption of molecules having a cross-section area greater than that of the nitrogen molecule.en
dc.description.abstractKratkovremenom termičkom aktivacijom gibsita u reaktoru za pneumatski transport čestica na temperaturama u intervalu od 883 do 943 K i vremenu boravka od 0.4 do 0.9 s dobijen je aktivni prah aluminijumoksida. Rentgenska strukturna analiza pokazala je da dobijeni uzorci imaju visok stepen amorfnosti i mali procenat polaznog gibsita. Na svim uzorcima su određene adsorpciono - desorpcione izoterme azota iz kojih je po BET - metodi izračunata specifična površina. Na osnovu rezultata sorpciono - strukturne analize određene su fraktalne dimenzije površine FHH - metodom, koje su poslužile za sagledavanje efektivne površine uzoraka aktivirane alumine za adsorpciju molekula veće površine poprečnog preseka od molekula azota.sr
dc.publisherSerbian Chemical Society
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/142019/RS//
dc.rightsopenAccess
dc.sourceJournal of the Serbian Chemical Society
dc.subjectpneumatic transporten
dc.subjecttransition amorphous aluminasen
dc.subjectX-ray diffractionen
dc.subjectfractal dimensionen
dc.titleThe sorption and crystallographic characteristics of alumina activated in a reactor for pneumatic transporten
dc.titleSorpcione i kristalografske karakteristike alumine dobijene u reaktoru za pneumatski transport česticasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dcterms.abstractПетровић, Срђан; Грбавчић, Жељко; Росић, Aлександра; Рожић, Љиљана; Новаковић, Татјана; Чупић, Жељко; Сорпционе и кристалографске карактеристике алумине добијене у реактору за пнеуматски транспорт честица; Сорпционе и кристалографске карактеристике алумине добијене у реактору за пнеуматски транспорт честица;
dc.citation.volume71
dc.citation.issue11
dc.citation.spage1237
dc.citation.epage1246
dc.citation.other71(11): 1237-1246
dc.citation.rankM23
dc.identifier.doi10.2298/JSC0611237R
dc.identifier.rcubConv_225
dc.identifier.fulltexthttp://cer.ihtm.bg.ac.rs//bitstream/id/8821/245.pdf
dc.identifier.scopus2-s2.0-33846353590
dc.identifier.wos000243619400011
dc.type.versionpublishedVersion


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