Вид документа : Шифр издания : 54/K 81 Автор(ы) : Krasil'nikov V. N. Заглавие : Phase Ratios in the K2O-V2O4-SO3 System at High Sulfur Trioxide Concentrations Место публикации : Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 2. - С. 258-262: il. Примечания : Bibliogr. : p. 262 (15 ref.) ISSN: 0036-0236 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): оксидные системы--ванадиевые катализаторы--триоксид серы Аннотация: Phase ratios in the three-component oxide system K2O–V2O4–SO3 in the region of the sulfur trioxide concentrations corresponding to its concentrations in the active component of vanadium catalysts for SO2 to SO3 conversion have been studied using powder X-ray diffraction, IR spectroscopy, microscopy, and chemical analysis. Four individual compounds (K2VO(SO4)2, K2(VO)2(SO4)3, K2VO(SO4)2S2O7, and K2(VO)2(SO4)2S2O7) and K2(VO)2(SO4)2S2O7 and VOSO4-base solid solutions of composition K2(VO)2 + x(SO4)2 + xS2O7 (0 ≤ x ≤ 1.5) were found in the system. K2VO(SO4)S2O7 and K2(VO)2(SO4)2S2O7 lose their sulfur trioxide when heated above 350°C under an inert atmosphere, and convert to K2VO(SO4)2 and K2(VO)2(SO4)3, respectively. This implies that K2VO(SO4)2S2O7 and K2(VO)2(SO4)2S2O7, as well as K2(VO)2 + x(SO4)2 + xS2O7 solid solution, cannot exist in the active component of real industrial catalysts Доп.точки доступа: Красильников Владимир Николаевич