Инд. авторы:	Bul'bak T.A., Shvedenkova S.V., Likhacheva A.Y.
Заглавие:	Experimental study of natrolite and scolecite saturation with ammonium, methane, and propane
Библ. ссылка:	Bul'bak T.A., Shvedenkova S.V., Likhacheva A.Y. Experimental study of natrolite and scolecite saturation with ammonium, methane, and propane // Geochemistry International. - 2011. - Vol.49. - Iss. 3. - P.291-298. - ISSN 0016-7029. - EISSN 1531-8397.
Внешние системы:	DOI: 10.1134/S0016702911010022; SCOPUS: 2-s2.0-79953000527;
Реферат:	eng: The incorporation of the molecular species of C-H-N fluid (ammonium, methane, and propane) into the structural cavities of natrolite and scolecite was experimentally studied at t = 200°C, P = 20 MPa, and an experiment duration of 192 h. The zeolites were modified without ion exchange by the exposure of a preliminarily dehydrated mineral to the appropriate gas. The presence of ammonium and light hydrocarbons in the crystal matrix of zeolites was confirmed by IR and Raman spectroscopy and gas chromatography. The data of differential thermogravimetry revealed differences in the behavior of CH4- and NH3-zeolites during heating. The X-ray diffraction patterns and IR and Raman spectra of zeolites in the region of framework vibration indicate deformations in the matrix structure after the experiments. The interaction of dehydrated scolecite with 'dry' propane resulted in amorphization under the experimental parameters. The maximum methane contents in the freshly synthesized zeolites determined by gas chromatography are 4.12 wt % for CH4-scolecite and 8.96 wt % for CH4-natrolite. The synthetic C3H8-natrolite contains 4.45 wt % C3H8. In the zeolites saturated with respect to dry ammonium, the highest NH3 contents were observed in the 0.4-0.25 mm scolecite fraction (12.86 wt %), 0.25-0.05 mm scolecite fraction (11.43 wt %), and NH3-natrolite (9.28 wt %). © 2011 Pleiades Publishing, Ltd.
Ключевые слова:	Raman spectroscopy; Experimental parameters; Experimental studies; IR and Raman spectra; IR and Raman spectroscopy; Light hydrocarbon; Matrix structure; Methane content; Molecular species; natrolite; scolecite; Synthesized zeolite; Ammonium compounds; Behavioral research; Diffraction; Fluids; Gas chromatography; Ion exchange; Methanation; Methane; Propane; Raman scattering; Raman spectroscopy; Silicate minerals; Thermogravimetric analysis; X ray diffraction; Zeolites; ammonium; experimental mineralogy; gas chromatography; methane; natrolite; propane; zeolite; Differential thermogravimetry; Crystal matrix; ammonium; zeolites; scolecite; propane; natrolite; methane; fluid; X-ray diffraction; ammonium;
Издано:	2011
Физ. характеристика:	с.291-298