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Titolo:
Synthesis of the [Ga]-MFI under atmospheric pressure
Autore:
Park, J; Kim, SB; Ha, JM; Kim, MS; Park, HS; Hahm, HS;
Indirizzi:
Myongji Univ, Dept Chem Engn, Yongin 449728, South Korea Myongji Univ Yongin South Korea 449728 Engn, Yongin 449728, South Korea
Titolo Testata:
KOREAN JOURNAL OF CHEMICAL ENGINEERING
fascicolo: 4, volume: 18, anno: 2001,
pagine: 468 - 474
SICI:
0256-1115(200107)18:4<468:SOT[UA>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROPANE AROMATIZATION; ZEOLITE CATALYSTS; GALLIUM; MFI; GALLOSILICATES; ZSM-5; GA; GALLOALUMINOSILICATE; CRYSTALLIZATION; CRYSTALS;
Keywords:
zeolite; [Ga]-MFI; gallosilicate; atmospheric pressure synthesis; Ga-71-mas-NMR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Hahm, HS Myongji Univ, Dept Chem Engn, Yongin 449728, South Korea Myongji Univ Yongin South Korea 449728 ngin 449728, South Korea
Citazione:
J. Park et al., "Synthesis of the [Ga]-MFI under atmospheric pressure", KOR J CHEM, 18(4), 2001, pp. 468-474

Abstract

The crystallization of the [Ga]-MFI was investigated as a function of synthesis time under atmospheric pressure. The molar composition of the reactants was 100SiO(2)-Ga2O3-11Na(2)O-11TPABr-3500H(2)O. The crystallinity of the[Ga]-MFI was examined by using several analytical instruments, such as XRD, XPS, XRF,FT-IR, solid-state mas-NMR, DTG/DTA, and SEM. The [Ga]-MFI was successfully synthesized under atmospheric pressure at 97 degreesC in 72 h. It was found that the nucleation of the [Ga]-MFI took a quite long time, but the crystallization took place very fast. It is supposed that nucleation is the rate-controlling step in the [Ga]-MFI synthesis under atmospheric pressure. Consequently, if the induction period of the nucleation can be shortened, it would be possible to synthesize the [Ga]MFI commercially under atmospheric pressure.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 01:11:49