catalКатализ в промышленностиKataliz v promyshlennosti1816-03872413-6476LLC "KALVIS"10.18412/1816-0387-2020-6-473-484catal-728Research ArticleКАТАЛИЗ В ХИМИЧЕСКОЙ И НЕФТЕХИМИЧЕСКОЙ ПРОМЫШЛЕННОСТИCATALYSIS IN CHEMICAL AND PETROCHEMICAL INDUSTRYПаровая конверсия метанола на катализаторах состава Cd-(Zn)/TiO2 и Cu-(Zn)/TiO2 в микроканальном реактореSteam reforming of methanol over Cd-(Zn)/TiO2 and Cu-(Zn)/TiO2 catalysts in a microchannel reactorАндреевД. В.AndreevD. V.ctls@kalvis.ruСергеевЕ. Е.SergeevE. E.ctls@kalvis.ruИнститут катализа им. Г.К. Борескова СО РАН, НовосибирскРоссияBoreskov Institute of Catalysis SB RAS, NovosibirskRussian Federation202025112020206473484Copyright © LLC "KALVIS", 20202020LLC "KALVIS"LLC "KALVIS"https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNoticehttps://www.catalysis-kalvis.ru/jour/article/view/728

Проведен синтез новых катализаторов состава Cd-(Zn)/TiO2 и Cu-(Zn)/TiO2, на основе нанодисперсного оксида титана (IV), и их характеризация методами рентгенофазового анализа, низкотемпературной адсорбции азота и термопрограммируемого восстановления в водороде. Исследована активность синтезированных катализаторов в реакции паровой конверсии метанола в условиях микроканального реактора. Показано, что наиболее активными являются Cd-содержащие катализаторы, которые, кроме того, проявляют наименьшую селективность в отношении моноксида углерода. Проведено сопоставление каталитических и физико-химических свойств исследуемых катализаторов. Показана корреляция активности катализаторов со способностью к частичному восстановлению водородом катионов Ti4+ в Ti3+ в носителе TiO2. Высказано предположение, что способность к восстановлению катионов титана зависит от полупроводниковых свойств оксидов, составляющих катализатор.

Novel catalysts with the composition Cd-(Zn)/TiO2 and Cu-(Zn)/TiO2 containing nanodispersed titanium(IV) oxide were synthesized and characterized using X-ray diffraction analysis, low-temperature nitrogen adsorption and temperature-programmed reduction in hydrogen. Activity of the synthesized catalysts toward steam reforming of methanol was studied in a microchannel reactor. The highest activity was observed for the Cd-containing catalysts; in addition, they showed the lowest selectivity to carbon monoxide. The catalytic and physicochemical properties of the tested catalysts were compared. A correlation was found between activity of the catalysts and their ability to partial hydrogen reduction of Ti4+ cations to Ti3+ in the TiO2 support. Supposedly, the ability to reduce titanium cations depends on semiconductor properties of the oxides in the catalyst.

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