Abstract:
A moisture exchange module has a bundle of moisture-permeable hollow fibre membranes and at least one line element for supplying a gas stream that flows through the hollow fibres in an inner flow. The at least one line element opens out into an inflow region, which is of at least approximately the same cross section as the bundle of hollow fibre membranes. According to the present invention, the at least one line element opens out into the inflow region at an angle of from 60° to 120° with respect to the longitudinal axis of the bundle of hollow fibre membranes without the longitudinal axes of the one line element and of the bundle of hollow fibre membranes intersecting one another. An annular diverter means for diverting the gas flow are provided between the cross section of the line elements through which gas can flow and the inflow region. The diverter means are arranged in such a way that an annular gap is formed, which annular gap is connected to the at least one line element and, on its side remote from the bundle of hollow fibre membranes, is connected to the inflow region.
Abstract:
In an exemplary embodiment of the present invention, a moisture exchange module comprises a moisture-permeable hollow fiber membrane shell space with a bundle of moisture-permeable hollow fiber membranes being arranged in the shell space for receiving a first gas stream. A conduit member is coupled to the shell space for supplying a second gas stream for flow around the hollow fibers. Pursuant to a feature of the exemplary embodiment of the present invention, a mechanism is arranged and configured in the conduit member to produce a swirling motion in the second gas stream.
Abstract:
An exhaust-gas purification installation for purifying exhaust gas from an internal combustion engine includes an exhaust-gas catalytic converter which is arranged in an exhaust pipe of the internal combustion engine and a catalytic fuel reformer for generating a hydrogen-containing reformer gas which can be fed to the exhaust pipe on an entry side of the exhaust-gas catalytic converter. It is possible for a hydrocarbon-containing fuel, which can be used to operate the internal combustion engine, to be fed to the fuel reformer in order to generate the reformer gas. An exhaust-gas heater can heat the exhaust-gas part-stream which is fed to the fuel reformer. In a method according to the invention, an exhaust-gas part-stream which is removed from the exhaust pipe is heated and fed to the fuel reformer.
Abstract:
The invention relates to an autothermic reforming reactor, comprising an endothermic reaction zone, in which the reforming reaction takes place; an exothermic reaction zone, in which the energy is released which is required for the reforming reaction; a quench zone connected downstream of the reaction zones for the rapid cooling of the reactor gas volume flow. According to the invention, the endothermic reaction zone and the quench zone are separated by a gas permeable heat shield (HS), whereby the heat shield (HS) comprises thermal insulation (IS) for thermally insulating the endothermic reaction zone and quench zone, in addition to a thermal radiator (STR) which faces the endothermic reaction zone and radiates the thermal energy which has been absorbed from the reactor gas volume flow.
Abstract:
A heat exchanger system for a device for autothermal reforming of a hydrocarbon having a reaction zone fed with at least two fluids which react with one another, the reaction zone being at a higher temperature level than an environment of the device and at least one of the fluids being heated by the reaction products effluent from the reaction zone. The heat exchanger system includes tubes for transporting the effluent reaction products, at least one section of the tubes being arranged essentially parallel to a center axis of the reaction zone and led through the flow path of the fluid to be heated. At least sections of the flow path are curved helically or spirally around the center axis so that the fluid to be heated impinges on and passes around the tubes containing the effluent reaction products essentially perpendicularly. The flow path of the fluid to be heated is laid out with respect to the center axis of the tube arrangement in such a manner that the fluid to be heated is conveyed from outside to inside and/or from inside to outside at least once.
Abstract:
A reforming reactor, particularly for the water vapor reforming of methanol, with three serially arranged reactor steps, each of which is charged with a catalyst pellet fill. According to the invention, the center reactor step is maintained at a temperature which is suitable for the reforming reaction, while the two other reactor steps remain unheated. The present invention may be used as a reforming reactor for the water vapor reforming of methanol for the purpose of producing hydrogen in a fuel-cell operated motor vehicle.
Abstract:
The invention provides a process for operating a system for water vapor reforming of methanol in which, in a mixture preparation step, a water vapor/methanol mixture is prepared from water and methanol and is introduced into a reforming reactor. According to the invention, the mixing ratio of the water vapor/methanol mixture is adjusted as a function of the load condition and/or load changes of the system so that a CO-concentration is obtained in the reformate which remains constant over the whole load range.