Regenerating Spent Solutions of Vanadium-containing Heteropoly Acids in the Presence of Additives

Elena G. Zhizhina, Yulia A. Rodikova, Olga Yu Podyacheva, Zinaida P. Pai

Результат исследования: Научные публикации в периодических изданияхстатья

Аннотация

Vanadium-containing heteropoly acid solutions of Keggin H3+xPMo12–xVxO40 and modified HaPzMoyVxOb types (P-Mo-V HPAs) are promising nanosized inorganic metal-oxygen cluster compounds with the property of reversible oxidability (VV ↔ VIV). The oxidation of reduced P-Mo-V HPAs at a temperature of 130–170 °C and an oxygen pressure of 4 atm is a convenient method for their regeneration, but results in regeneration degree of only 75–88 %. Various materials with electron transfer or oxidative properties, such as nitrogen doped carbon nanofibers (N-CNFs), Sibunit-4, HNO3, and MoO2, were investigated as additives to facilitate and accelerate the regeneration of HPA solutions. Among the studied additives HNO3 was found to show the best efficiency, resulting in regeneration degree of higher 95 %. Rapid and efficient regeneration of spent HPA catalysts is an important criterion for achieving high productivity and sustainability of oxidative processes on their basis.

Язык оригиналаанглийский
Страницы (с-по)869-876
Число страниц8
ЖурналZeitschrift fur Anorganische und Allgemeine Chemie
Том644
Номер выпуска16
DOI
СостояниеОпубликовано - 31 авг 2018
Опубликовано для внешнего пользованияДа

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