Abstract:
A hydroprocessing catalyst has been developed. The catalyst is a unique crystalline transition metal oxy-hydroxide molybdotungstate material. The hydroprocessing using the crystalline ammonia transition metal oxy-hydroxide molybdotungstate material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.
Abstract:
The present invention relates to a method of production of perovskite structure catalysts for high temperature decomposition of N 2 O, the catalysts having a general formula A 1-x B x C y D 1-y O 3-δ and wherein A and B are selected from the group consisting of lanthanides, alkaline earth metals, Group III.A and IV.A metals, transition metals of groups IB, II.B, III.B, IV.B, VI.B, VIII.B and Bi; C and D are selected from the group consisting of transition metals of Groups IV.B, V.B, VI.B, VII.B, VIII.B, Lanthanides, Sn, Al and Sb; x and y are independent numbers ranging from 0 to 1, and δ is the oxygen non-stoichiometric number of values ranging from -0.1 to 0.5; which comprises the steps of mixing of solid phases of water-soluble salts of cations A, B, C and D with a water soluble anionic salt selected from the group comprising carbonate, bicarbonate, oxalate, sulfate, metaphosphate, phosphate, hydroxide, nitrite, chromate and dichromate; homogenization; addition of surfactant; stirring; suspension filtration, drying and calcination. The present invention further relates to catalysts of perovskite structure and use thereof for high temperature decomposition of N 2 O.
Abstract:
The present invention relates to a method of preparing a catalyst for oxidative dehydrogenation. More particularly, the present invention provides a method of preparing a catalyst for oxidative dehydrogenation providing superior selectivity and yield for a conjugated diene according to oxidative dehydrogenation by constantly maintaining pH of a coprecipitation solution using a drip-type double precipitation method to adjust an ±-iron oxide content in a catalyst in a predetermined range.
Abstract:
The present invention refers to a catalyst device (1) comprising: a) a ferroelectric material substrate (2) comprising one first surface (2.1) opposed to a second surface (2.2); b) a conducting material layer (3) deposited on the first surface (2.1) of the ferroelectric material substrate (2), c) a catalyst material layer (4) deposited on the second surface (2.2) of the ferroelectric material substrate (2), said catalyst material layer comprising an outer surface (4.1), wherein the catalyst device is characterized by further comprising: d) a conducting material (5) covering between 10% and 75% of the outer surface (4.1) of the catalyst material layer (4), based on the total outer surface (4.1) of the catalyst material layer (4), and wherein the distance between any point in the outer surface (4.1) of the catalyst material layer (4) that is not covered by conducting material (5) and the closest point in the outer surface (4.1) of the catalyst material layer (4) that is covered with conducting material (5) is equal to or shorter than 1 mm. The invention also refers to the use of this catalyst device for reduction or elimination of nitrogen oxides, preferably from internal combustion engines.
Abstract:
A used denitration catalyst is regenerated by means of a method comprising bringing the used denitration catalyst comprising titanium oxide as an essential ingredient into contact with a suspension of particles comprising manganese oxide, subjecting the resulting product to a liquid draining, and subjecting the liquid-drained product to a drying process, additionally, further comprising impregnating a solution comprising a compound containing at least one element selected from the group consisting of vanadium, molybdenum and tungsten into the denitration catalyst after the drying process, and subjecting the impregnated product to a drying treatment.
Abstract:
Embodiments of the invention include a filtration element. In an embodiment, the invention includes a filtration element for an airplane cabin that includes a first media portion upstream from a second media portion. The first media portion can include activated carbon. The second media portion can include a catalyst material. Other embodiments are also included herein.
Abstract:
An oxygen-generating catalyst, according to an embodiment of the present invention, comprises non-stoichiometric manganese oxide comprising trivalent manganese and represented by chemical formula (1) below. Chemical formula (1): Mn 1-δ O, wherein δ satisfies 0