Abstract:
本发明属于烟气脱硝领域,具体涉及一种抗二氧化硫型低温锰-铁氧化物脱硝催化剂及其制备方法。该脱硝催化剂由碳纳米管(CNTs)载体,锰-铁氧化物(Mn-FeO x )活性组分组成。通过掺杂铁氧化物,得到抗SO 2 型低温Mn-FeO x /CNTs催化剂,所制备的催化剂具有低温(80~180℃)活性优异、抗SO 2 性能显著和制备工艺简单等优点。
Abstract:
The present invention generally relates to catalyst compositions comprising aluminates, such as nickel aluminates, and related methods. In some embodiments, the catalyst composition may be advantageously modified, for example, by the addition of one or more metal additives to further enhance catalyst performance. Such modifications can provide a more effective catalyst and can reduce the level of coking during catalytic processes. Some embodiments of the invention may provide effective catalyst compositions for steam reforming. In some cases, the catalyst composition may be utilized under relatively mild reaction conditions.
Abstract:
A reduction catalyst having a first metal component comprising one of Co, Os, Fe, Re, Rh and Ru. The first metal component is present in the catalyst at from 0.5 percent to 20 percent, by weight. A second metal component differing from the first metal component present in the catalyst with the second metal component being selected from the group consisting of Fe, Mn, Ru, Os, Rh, Ir, Ni, Pd, Pt, Ag, Au, Zn, Co, Re, Cu, Pb, Cr, W, Mo, Sn, Nb, Cd, Te, V, Bi, Ga and Na. A hydrogenation catalyst comprising one or both of Ni and Co and one or more elements selected from the group consisting of Mn, Fe, Ag, Au, Mo and Rh.
Abstract:
Disclosed are catalysts and methods that can reform aqueous solutions of oxygenated compounds such as ethylene glycol, glycerol, sugar alcohols, and sugars to generate products such as hydrogen and alkanes. In some embodiments, aqueous solutions containing at least 20 wt% of the oxygenated compounds can be reformed over a catalyst comprising a Group VIII transition metal and a Group VIIB transition metal, preferably supported on an activated carbon-supported catalyst. In other embodiments, catalysts are provided for the production of hydrogen or alkanes at reaction temperatures less than 300 ° C.
Abstract:
The present invention provides a catalyst which can convert ammonia contained in exhaust gas from an engine of a vehicle equipped with a Urea-SCR(Urea-Selective Catalytic Reduction) system, to nitrogen(N2), and a method for preparating the same. Particularly, when a urea solution is injected to exhaust gas from a vehicle equipped with a Urea-SCR system, the injected urea is decomposed to ammonia(NH3) at the temperature of exhaust gas, and then the ammonia is fed to a SCR catalyst system together with nitrogen oxides (NOx) contained in exhaust gas, wherein the NOx are later converted to N2. The present invention relates to a catalyst which can convert ammonia which is failed to participate in a conversion reaction of NOx to N2 and slipped out of the SCR catalyst, to nitrogen via a SCO(Selective Catalytic Oxidation) reaction, before the ammonia is released to the air. The present invention relates to a catalyst for conversion of ammonia to nitrogen via selective oxidation of ammonia, characterized in that a carrier is coated to a support, and then palladium and either of nickel or manganese are supported on the resulted carrier; and to a method for preparing the same. In addition, the present inveniotn relates to a method for reducing ammonia by using the catalyst as a catalyst for selective oxidation of ammonia.
Abstract:
A process for the preparation of a catalyst or catalyst precursor, comprising the steps of : (a) admixing: (i) a catalytically active metal or metal compound (ii) a carrier material (iii) a gluing agent; and (iv) optionally one or more promoters, and /or one or more co-catalysts; (b) forming the mixture of step (a) ; and (c) drying the product of step (b) for more than 5 hours at a temperature up to 100 C to form the catalyst or catalyst precursor. The catalyst material mixture does not need to be calcined after forming to achieve the required minimum strength for use in a suitable reaction, such as Fischer Tropsch.
Abstract:
The invention relates to a novel process for producing hydrocarbons, which process comprises contacting a mixture of carbon monoxide and hydrogen at elevated temperature and pressure with a catalyst comprising a Group VIII metal supported on a carrier, which Group VIII metal is present at least partly in metallic form, and which catalyst further comprises inorganic phosphate in a quantity of at least 0.05 %w, calculated as elemental phosphorus relative to the weight of the catalyst; a novel catalysts which comprises, supported on a carrier, a Group VIII metal selected from nickel, cobalt, iron and ruthenium, and a further metal selected from manganese, vanadium, zirconium and rhenium, which catalyst further comprises inorganic phosphate in a quantity of at least 0.05 %w, calculated as elemental phosphorus relative to the weight of the catalyst; and a process for preparing the novel catalyst composition.