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[en] Applying infrared spectroscopy a study was made on interaction of ZrO2, Ga2O3, BeO, NaJ, Co with aprotic acid centers of oxide catalysts. Adsorption isotherms and isobars were studied in -110-25 deg temperature range and at 0.001-10 Ho. mm pressures. Heats of Co interaction with aprotic centers were determined. It was shown, that in the case of high-charge metal cabions ßsub(CO) frequency depends linearly on heat of CO and this cation interaction. Heats and entropies of CO complex adsorption on catalyst surface were determined
Journal
Kinetika i Kataliz; ISSN 0453-8811; 
; v. 23(1); p. 164-170
; v. 23(1); p. 164-170
No abstract available
Source
Zubavichus, Ya.V.; Tsybulya, S.V. (eds.); Inst. Kataliza im. G.K. Boreskova SO RAN, Novosibirsk (Russian Federation); Novosibirskij Gosudarstvennyj Univ., Novosibirsk (Russian Federation); Inst. Yadernoj Fiziki im. G.I. Budkera SO RAN, Novosibirsk (Russian Federation); Novosibirskij Inst. Organicheskoj Khimii im. N.N. Vorozhtsova SO RAN, Novosibirsk (Russian Federation); Inst. Neorganicheskoj Khimii im. A.V. Nikolaeva SO RAN, Novosibirsk (Russian Federation); Nauchnyj Sovet po Katalizu, Novosibirsk (Russian Federation); 456 p; ISBN 978-5-906376-29-9; ; 2020; p. 63-64; MISSFM-2020: 3. All-Russian conference ''Methods of studying the composition and structure of functional materials''; 3-ya Vserossijskaya konferentsiya «Metody issledovaniya sostava i struktury funktsional'nykh materialov» (MISSFM-2020); Novosibirsk (Russian Federation); 1-4 Sep 2020
; 2020; p. 63-64; MISSFM-2020: 3. All-Russian conference ''Methods of studying the composition and structure of functional materials''; 3-ya Vserossijskaya konferentsiya «Metody issledovaniya sostava i struktury funktsional'nykh materialov» (MISSFM-2020); Novosibirsk (Russian Federation); 1-4 Sep 2020
[en] Using the method of IR spectroscopy, acid properties of 12-Mo molybdophosphoric heteropolyacid applied to SiO2, TiO2, Al2O3 supporters and its sodium and copper salts applied to SiO2, are investigated. The presence of Broensted and Lewis acid centres in all the catalysts studied is ascertained. It is shown, that the concentration and, in certain cases, the strength of Broensted acid centres can be altered by varying the degree of metal cation substitution in heteropolyacid for protons, the content of heteropoly compounds on the supporter, degree of their dehydration and type of the supporter used
Journal
[en] Acidity of nineteen heteropolyacids (HPA) of nine structural types (two of them were unknown previously) and one isopolyacid was studied by the method of proton affinity determination using IR spectroscopy of pyridinium salts. HPA studied along with Mo, W, P atoms characteristic of this class contained As, B, Bi, Ce, Sn, Ti, V or Zr. It was ascertained that all the HPA studied feature high acidity, i.e. at the level of CF3SO3H and HClO4, while tungstophosphoric acid H3PW12O40 proved the strongest one
[ru]
Методом определения сродства к протону с помощью ИК-спектроскопии пиридиниевых солей изучена кислотность девятнадцати гетерополикислот (ГПК) девяти структурных типов (из них двух ранее неизвестных) и одной изополикислоты. Изученные ГПК наряду с характерными для этого класса соединений атомами Mo, W, P или Si содержали также атомы As, B, Bi, Ce, Sn, Ti, V или Zr. Установлено, что все изученные ГПК обладают высокой кислотностью - на уровне CF3SO3H и HClO4, а наиболее сильной кислотой оказалась фосфорновольфрамовая кислота H3PW12O40Journal
Izvestiya Akademii Nauk. Rossijskaya Akademiya Nauk. Seriya Khimicheskaya; ISSN 1026-3500; ; CODEN IASKEA; (no.4); p. 563-565
; CODEN IASKEA; (no.4); p. 563-565
[en] Quantum chemical calculations, an IR spectroscopic experiment, and calculations of the frequencies of the normal vibrations show that in the adsorption of an ammonia molecule on HNaY zeolite, an ammonium ion is formed, possessing two strong hydrogen bonds to the surface. It is concluded that both acid and basic sites of the surface participate in the formation of the ammonium ion: interaction with the basic site plays a role in the energetics of this process analogous to the effect of solvation in the liquid phase. On this basis an interpretation is given of the calorimetric data on the adsorption of a number of amides on HNaY zeolite
Journal
[en] Using the methods of IR-spectroscopy and chemical analysis, interaction of zirconium tetrahydroborate with silica gel and aluminium oxide, composition of the surface complexes formed and their transformations in the process of thermal activation of the catalysts are studied. It is established that decomposition of the surface complexes of the type (Eh-O)sub(n) - Zr(BHsub(4))sub(4-n) (Eh=Si; Al; n=1-2) occurs when catalysts heating with the formation of surface zirconium hydrides, which are alkylated by ethylene under polymerization conditions
Journal
Kinetika i Kataliz; ISSN 0453-8811; ; v. 21(3); p. 739-746
; v. 21(3); p. 739-746
[en] Adsorption of H3PW12O40 from water and organic oxygen-containing solvents (AcOH, Me2CO, MeOH) on porous carbon materials, i.e. sibunite and catalytic fibrous carbon (CFC), was studied using the methods of elementary analysis, IR spectroscopy and electron microscopy. It was ascertained that the amount of irretrievably sorbed heteropolyacid makes up 50-100 mg per 1 g of carrier, decreasing in the series of solvents: H2O>Me2CO>AcOH>MeOH. CFC adsorptivity depends on the value of specific surface, total volume of pores and CFC fibre microstructure
[ru]
С использованием методов элементного анализа, ИК спектроскопии и электронной микроскопии изучена адсорбция H3PW12O40 из воды и органических кислородсодержащих растворителей (AcOH, Me2CO, MeOH) на пористых углеродных материалах - сибуните и каталитическом волокнистом углероде (КВУ). Установлено, что количество необратимо сорбированной гетерополикислоты составляет 50-100 мг на 1 г носителя и уменьшается в ряду растворителей: H2O>Me2CO>AcOH>MeOH. Адсорбционная емкость КВУ зависит от величины удельной поверхности, суммарного объема пор и микроструктуры волокна КВУJournal
Izvestiya Akademii Nauk. Rossijskaya Akademiya Nauk. Seriya Khimicheskaya; ISSN 1026-3500; ; CODEN IASKEA; (no.2); p. 232-236
; CODEN IASKEA; (no.2); p. 232-236
[en] Preparation of applied zirconium sulfate catalysts obtained by the method of impregnation is investigated. Results of comparative study of structural, acid-base and catalytic properties of sulfated zirconium dioxide applied on silica gel and aluminium oxide are represented. Intervals of values of synthesis basic parameters and characteristics of catalysts properties providing achievement of high activity and selectivity in isobutane alkylation by butenes in liquid phase are determined
[ru]
Рассмотрено приготовление нанесенных цирконийсульфатных катализаторов, получаемых методом пропитки. Представлены результаты сравнительного изучения структурных, кислотно-основных и каталитических свойств сульфатированного диоксида циркония, нанесенного на силикагель и оксид алюминия. Определены интервалы значений основных параметров синтеза и характеристик свойств катализатора, обеспечивающих достижение высокой активности и селективности при жидкофазном алкилировании изобутана бутенамиJournal
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