65results about How to "Good catalytic activity at low temperature" patented technology

The invention relates to a liquid-phase CO2 methanation catalyst, a preparation method and application of the catalyst. The liquid-phase CO2 methanation catalyst comprises amphipathic ionic liquid and metal active components dispersed in the amphipathic ionic liquid in the state of stable colloid, the grain sizes of the metal active components range from 0.5nm to 20nm, the spherical metal active components include a first metal active component and a second metal active component, the first metal active component includes nickel, the second metal active component includes one or mixture of more than one of lanthanum, cerium, molybdenum, ruthenium, ytterbium, rhodium, palladium, platinum, potassium and magnesium, and the molar ratio of the first metal active component to the second metal active component is 10:0.1-2. The metal active components in the liquid-phase CO2 methanation catalyst are small in grain size, narrow in distribution, wide in application prospect, easy to separate and recyclable, CO2 methanation of low-temperature liquid phase can be realized at the temperature of 100-200 DEG C, the liquid-phase CO2 methanation catalyst has excellent low-temperature catalytic activity, methane selectivity and heat stability, and the preparation method is simple and practicable, low in cost and easy in popularization.

The invention discloses a method for catalytically oxidizing NO by a dielectric barrier discharge plasma modified catalyst. The method comprises the steps of filling a catalyst into a dielectric barrier discharge plasma reactor to be modified; and placing the modified catalyst into a glass pipe type fixed bed reactor and introducing mixed gas to catalytically oxidize the NO into NO2. The modified catalyst has higher low-temperature catalytic activity and the NO catalytic oxidization efficiency can reach 75-85% at maximum; the cylindrical dielectric barrier discharge plasma reactor is adopted so as to be convenient for observing modification conditions of the catalyst; the actual operation is simple and the modification condition is easy to control; the energy consumption is lower; the modification time is shorter; the product NO2 can be absorbed by an alkali solution to obtain a byproduct and can be recycled; and the method is convenient for actual production and application and has a higher industrial application value.

The invention relates to a hydrogeneration catalyst for the tail gas of a Crouse sulphur recycle device and a preparation method for the catalyst. A nickel-based Crouse tail gas hydrogeneration catalyst, which is characterized in that the catalyst essentially comprises a main active component, a secondary active component and alumina, the mass percentage of each component is like follows: the mainactive component 20.1-60%, the secondary active component 0-10%, the alumina 40-79.9%, the sum of the three components is 100%; wherein, the main active component is nickel oxide, the secondary active component is one or the mixture of any two or three of chrome oxide, copper oxide and iron oxide, when the secondary active component is a mixture, the compounding ratio among the oxides is random.The invention has the advantages of the good catalyzing activity at low temperature and the low cost.