摘要:
A feed device for supplying solid urea granules into an ammonia generator arranged within or outside of an exhaust line for production of ammonia makes possible NOx reduction with the catalytic purification of exhaust of an internal combustion engine, gas turbine, or a burner, whereby the solid urea granules are stored in a holding tank. No compressed air support for transporting and metering the urea granules is required and transporting and metering of the urea granules adapted to the ammonia specifications is possible. The feed device has a housing with an inlet for supplying the urea granules and internally, a motor-driven, rotating disk with at least one spiral-shaped acceleration channel, as well as an outlet leading outward, to which a tube leading to the ammonia generator is connected.
摘要翻译:用于将固体尿素颗粒供给到布置在用于生产氨的排气管线内或外的氨发生器中的进料装置使得可以通过内燃机,燃气轮机的排气的催化净化来实现NO x 或燃烧器,由此将固体尿素颗粒储存在储存罐中。 不需要用于运输和计量尿素颗粒的压缩空气支撑物,并且适合氨规格的尿素颗粒的输送和计量是可能的。 进料装置具有壳体,其具有用于供应尿素颗粒的入口和内部具有至少一个螺旋形加速通道的马达驱动的旋转盘,以及向外引导的出口,导向氨的管 发电机连接。
摘要:
A feed device for supplying solid urea granules into an ammonia generator arranged within or outside of an exhaust line for production of ammonia makes possible NOx reduction with the catalytic purification of exhaust of an internal combustion engine, gas turbine, or a burner, whereby the solid urea granules are stored in a holding tank. No compressed air support for transporting and metering the urea granules is required and transporting and metering of the urea granules adapted to the ammonia specifications is possible. The feed device has a housing with an inlet for supplying the urea granules and internally, a motor-driven, rotating disk with at least one spiral-shaped acceleration channel, as well as an outlet leading outward, to which a tube leading to the ammonia generator is connected.
摘要翻译:用于将固体尿素颗粒供给到布置在用于生产氨的排气管线内或外的氨发生器中的进料装置使得可以通过内燃机,燃气轮机的排气的催化净化来实现NO x 或燃烧器,由此将固体尿素颗粒储存在储存罐中。 不需要用于运输和计量尿素颗粒的压缩空气支撑物,并且适合氨规格的尿素颗粒的输送和计量是可能的。 进料装置具有壳体,其具有用于供应尿素颗粒的入口和内部具有至少一个螺旋形加速通道的马达驱动的旋转盘,以及向外引导的出口,导向氨的管 发电机连接。
摘要:
A diesel fuel based on ethanol is described, which comprises about 60 to about 90% (v/v) ethanol, up to about 20% (v/v) of a linear dialkyl ether with a chain length of about 10 to about 40 as well as mixtures thereof, and 0 to about 30% (v/v) combustion accelerator.
摘要:
Exhaust gas aftertreatment system for internal combustion engines operated with a lean mixture, wherein nitrogen oxides are reduced by an SCR catalyst, and particulates are removed by a particle separator or filter. A thermolysis catalyst is located near the engine in the exhaust gas split stream downstream of the supply point of the reducing agent. At temperatures above 135° C., this thermolysis catalyst vaporizes the water component of the aqueous urea solution. It contains a catalyst material that is thermally stable at exhaust gas temperatures occurring near the engine and preferentially reacts with the urea to form isocyanic acid. A hydrolysis catalyst is located in the exhaust gas stream downstream of the return of the split stream into the main stream of exhaust gas. The hydrolysis catalyst converts the isocyanic acid formed during thermolysis to ammonia and carbon dioxide using water vapor formed in the thermolysis catalyst.
摘要:
Exhaust gas aftertreatment system for internal combustion engines operated with a lean mixture, wherein nitrogen oxides are reduced by an SCR catalyst, and particulates are removed by a particle separator or filter. A thermolysis catalyst is located near the engine in the exhaust gas split stream downstream of the supply point of the reducing agent. At temperatures above 135° C., this thermolysis catalyst vaporizes the water component of the aqueous urea solution. It contains a catalyst material that is thermally stable at exhaust gas temperatures occurring near the engine and preferentially reacts with the urea to form isocyanic acid. A hydrolysis catalyst is located in the exhaust gas stream downstream of the return of the split stream into the main stream of exhaust gas. The hydrolysis catalyst converts the isocyanic acid formed during thermolysis to ammonia and carbon dioxide using water vapor formed in the thermolysis catalyst.
摘要:
A method for providing ammonia (NH3) in an exhaust gas flow of an internal combustion engine includes generating nitrogen monoxide (NO) with a plasma generator, reversibly storing at least a portion of the nitrogen monoxide (NO), reducing at least a portion of the stored and/or generated nitrogen monoxide (NO) to form ammonia (NH3) in a first gas flow, and mixing the first gas flow with the exhaust gas flow. The method and a device for reducing nitrogen oxides advantageously increase the efficiency of an on-board plasma-assisted generation of ammonia, particularly for mobile applications, such as in motor vehicles, and reduces the consumption of fuel required therefor, in comparison to prior art devices and methods.
摘要:
A fuel for compression-ignition engines is described, which contains mono oxymethylene dimethyl ether and has a cetane number of ≧51. This fuel for compression-ignition engines advantageously contains oxygenates of the n-polyoxaalkane type and/or di-tert-butyl peroxide. Up to about 20% by weight of the mono oxymethylene dimethyl ether can be replaced by dimethyl ether.
摘要:
The invention relates to the use of aqueous guanidinium formiate solutions, optionally combined with urea and/or ammonia and/or ammonium salts, for the selective catalytic reduction of nitrogen oxides using ammonia in exhaust gases of vehicles. The inventive guanidinium formiate solutions enable a reduction of the nitrogen oxides by approximately 90%. Furthermore, said guanidinium formiate solutions can enable an increase in the ammonia forming potential from 0.2 kg, corresponding to prior art, up to 0.4 kg ammonia per liter of guanidinium formiate, along with freezing resistance (freezing point below −25° C.). The risk of corrosion of the inventive guanidinium formiate solutions is also significantly reduced compared to that of solutions containing ammonium formiate.
摘要:
A device for producing ammonia from urea pellets includes a pellet dispensing device, a pellet accelerator, a pellet shooting channel, and an ammonia reactor having a chamber or zone for shooting in urea pellets and a pellet deflector arranged on an end of the shooting path. The device further includes a urea pellet evaporation device and a hydrolytic catalytic converter. The urea pellets are removed from the reservoir in a regulated number/quantity by a dispensing device and transported to the accelerating device, where the pellets are moved from the pellet shooting channel into the ammonia reactor, where they are broken down into small pieces by impacting a pellet deflector at the end of the shooting path. The pieces are converted into a gas mixture containing ammonia and isocyanic acid by means of a urea evaporation device. The isocyanic acid is subsequently converted into ammonia and carbon dioxide.
摘要:
A combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine is provided. A special platinum-coated preliminary oxidation catalytic converter is combined with at least one particle separator, which is exactly coordinated therewith, in a muffler to achieve carbon particle separation rates of greater than 50%.