Maria João Cardoso posted this:
Science and Technology Manager at UATEC - Unidade de Transferência de Tecnologia
Research & Technology Organization
UNIVERSIDAD DE ALICANTE posted this:Noble metal-free ceria-based diesel soot combustion catalyst, suitable for gas purification in Diesel engine exhaustsThe developed catalyst does not use Pt, which leads to a cheaper product. The resulting catalyst shows equal or even better performance as Pt catalysts. Following the patented procedure of synthesis, the catalyst produced has a lower particle size. This leads to higher surface per particle and therefore, a better ratio yield when interacting in oxidation reactions, leading to a higher oxygen production rate.
Centre Technology Transfer CITTRU posted this:The new oxide catalysts for the removal of nitrogen oxides originating from stationary emission sources.The experiments carried out with the assistance of these catalysts showed a high conversion efficiency of nitric oxide to nitrogen at relatively low temperatures – up to 100%. Designed reactor allows the direct removal of nitric oxide from the exhaust gases via the efficient decomposition of nitric oxide and, at the same time, systematic removal of carbon particles and other solid particles.
Centre Technology Transfer CITTRU posted this:Catalysts for low-temperature combustion of methane from low-caloric sources and methods for their preparationDue to the rising emission of methane and its extensive contribution to the greenhouse effect, the reduction of CH4 emissions from low-caloric anthropogenic sources is currently a vital importance. The main sources of the methane emission are: exploitation of oil pools, coal mining, pas power stations, landfills, agriculture and biomass. The most popular method of the reduction of methane is its catalytic combustion. Unfortunately, this method has few limitations associated mainly with hard activation of the C-H bond in CH4 and low concentrations of methane in the emitted gases. The catalytic oxidation of methane is limited also by the very large airflows (of order 105 m3/min), passing through the catalyst bed during the process. There is still a lack on the market of a technological solution based on total catalytic combustion of CH4 in the economically reasonable low-temperature window, i.e. below 400 °C. The most popular method among the methods limiting the emission of methane to the atmosphere is the one based on its catalytic combustion. However, this procedure has disadvantages, mainly due to the high activation energy of methane molecules and also because of the low concentration of methane emitted from anthropogenic sources. There is no technology allowing effectively combusting of methane with the concentration of 1-2 % and in the economically justified temperatures, i.e. lower than 400 °C. The fundamental advantages of offered solutions are: - method for preparing catalysts that ensures the repeatability of the parameters and high efficiency in the reactions of methane combustion, - increased both the activity and the thermal stability of the catalysts in comparison with other systems described in the literature, - possibility of using the catalysts in the total oxidation of methane emitted from the low-caloric sources at temperatures below 400 °C.
Centre Technology Transfer CITTRU posted this:Catalyst for low-temperature decomposition of dinitrogen oxide in tail gases from a nitric acid plantLow-temperature catalytic decomposition of dinitrogen oxide, carried out by the developed catalytic system which is the subject of the offer, is much more favorable in comparison with other solutions because of: •lack of necessity to use any reducing agents; •relatively low operating temperature; •high catalytic activity in the presence of other components of tail gases (oxygen, water and other oxides of nitrogen). Experimental studies, both in the laboratory scale and in the pilot plant at the Fertilizers Research Institute in Puławy (Poland), carried out for several prototype catalysts confirmed the high catalytic activity of materials offered. These studies consisted of: •passing a mixture of nitrous oxide and helium through the bed of a catalyst placed in a quartz reactor, •passing a tail gases from the pilot plant of nitric acid manufacturing, characterized by the same composition as the tail gases in the real industrial plant, through the catalytic system, and then determining the tail composition after reaction. The degree of decomposition of dinitrogen oxide in a mixture of N2O and He, at a temperature of 300°C was 95%, while decomposition products were only molecular nitrogen and oxygen. The pilot plant at a temperature of 350°C revealed the degree of decomposition of dinitrogen oxide was higher than 90%.