In this study, the modeling of the low-temperature catalytic abatement of NOX and N2O from tail gases in a weak nitric acid plant utilizing a single-pressure 0.716 MPa system was performed. A one-reactor concept assumes that in the first bed, NOX is reduced by ammonia on a commercial vanadia–alumina catalyst, and in the second bed, N2O is decomposed on a proprietary nickel–cobalt catalyst. The kinetics of N2O decomposition on a Cs/Ni0.1Co2.9O4 catalyst was experimentally studied in an isothermal flow reactor. The reaction rate constants were determined by varying the residence time and temperature; these data formed the basis for modeling kinetics and heat and mass transport in an adiabatic reactor in which the low-temperature mitigation of nitrogen oxides occurred. Taking into account the given spatial limitations inside the reactor and the allowable temperatures, the layer heights were evaluated to ensure a residual NOX and N2O content of less than 50 ppm. Catalyst loading using layers in a commercial reactor was estimated for the tail-gas flow rates of 46,040‒58,670 m3/h. Simulations showed that the optimum inlet temperature was 260 °C; in this case, the NOX and N2O conversion targets were achieved in the range of 46,040‒58,670 m3/h while adhering to catalyst bed height and outlet temperature limitations.
Исследование окислительной конденсации метана на Sr 2 TiO 4 катализаторах: влияние методов приготовления Работа выполнена в рамках государственного задания ФГБУН ИК СО РАН (проект № 0303-2016-0004). Выполнен синтез титаната стронция Sr 2 TiO 4 различными методами (соосаждение, осаждение на оксид титана, цитратный). Образцы, охарактеризованные методами РФА, ртутной порометрии и БЕТ, имели перовскитоподобную структуру, были хорошо окристаллизованы, удельная поверхность составляла от 0,6 до 3 м 2 /г. Каталитическая активность определена в реакции окислительной конденсации метана в диапазоне температур 700900°С. Показано, что наибольший выход С 2 -углеводородов обеспечивают образцы, полученные соосаждением или осаждением K 2 CO 3 . Ключевые слова: окислительная конденсация метана; слоистый перовскит; Sr 2 TiO 4 ; синтез; осаждение; цитратный метод.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.