Daimler Chrysler Ag

Daimler Ag

Andreas Docter

Steffen Oliver Wieland

Rainer Autenrieth

Norbert Wiesheu

Arnold Lamm

Bernhard Vogel

Bernd Krutzsch

Andreas Kaupert

Thomas Poschmann

David Agar

Marc Sommer

Martin Gosewinkel

Uli Roeltgen

A reactor for autothermal reforming of hydrocarbons that allows a reduction of excess-air factor &#x3c6; during the reforming without resulting in a reduced conversion of the hydrocarbons in an end region of the reaction zone. The reactor includes at least one reaction zone in which is arranged at least one catalyst structure for the reformation so that the educts involved in the reformation are converted while flowing through the reaction zone. A heating device is included for heating the end region of the reaction zone to accelerate the conversion of the hydrocarbons.

Reactor for autothermal reforming of hydrocarbons

A method for the autothermal reforming of a hydrocarbon, in particular of diesel, includes introducing a combustible mixture of the hydrocarbon to be reformed and an oxygen-containing medium into a first reaction zone of a reformer, A gas-phase reaction is ignited. After an operating temperature required for the autothermal reforming process is reached, water or a water-containing medium is introduced into the first reaction zone, and the water content is increased until the conditions for the reforming process of the hydrocarbon prevail. The reforming process then takes place predominantly in a second reaction zone.

Method for the autothermal reforming of a hydrocarbon

A reactor system for reacting a hydrocarbon or hydrocarbon derivative charging material comprises a catalyst-coated reaction chamber, to which a reaction educt stream can be fed through a reaction chamber inlet, and electric heating means. The reaction chamber inlet has a flat, electrically heatable, catalyst-coated, and reaction educt stream-permeable heater, which covers at least partially the inlet cross section of the reaction chamber inlet and through which the educts for reacting the charging material can be fed at least in a start operating phase of the reactor system. An electric heater may be provided in front of the reaction chamber inlet, for the purpose of heating at least one reaction educt in a start operating phase and there are means for point-by-point injection of at least one reaction educt, heated in the heater, into the reaction chamber.

Reactor system with electric heating means

A fuel cell method and apparatus includes upstream reforming of hydrocarbons and/or alcohols, with water contained in the exhaust air stream of the fuel cell system being recovered. An absorption unit is connected into the exhaust air stream of the fuel cell, and water absorbed therein is released in a desorption unit, preferably by means of heated air to be supplied, and/or by heating the glycol solution. The moist air can subsequently be returned to the fuel cell system or the reforming unit. This makes it possible to recover all of the process water, and to operate the system at low pressure.

Fuel cell system with device for water recovery and method of operating such a system

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.

Autothermic reforming reactor

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.

Heat exchanger system

An exhaust gas purification device in a vehicle, wherein a reforming reactor is provided for extraction of hydrogen from fuel and the hydrogen is supplied to an exhaust gas stream of an internal combustion engine upstream of the exhaust gas catalytic converter, wherein the reforming reactor includes a supply device for oxygen and/or water, wherein the reforming reactor is connected with a side branch of the exhaust gas conduit and wherein oxygen and water for reforming are supplied in the form of an exhaust gas partial stream via the side branch.

Device and method for cleansing exhaust gas

A fuel cell system has at least one fuel cell and a hydrogen generating arrangement for feeding the fuel cell anode with a hydrogen-containing product gas from a conversion reaction of a hydrocarbon starting substance or hydrocarbon derivative with of water fed supplied by way of a water feeding system. Water recovery devices are provided for condensing water out of the process gas supplied by the hydrogen generating arrangement, and/or out of the cathode waste gas carried away from the fuel cell cathode, and returning the condensed-out water into the water feeding system.

Fuel cell system with an assigned hydrogen generating arrangement

A method and apparatus for applying pressure to at least one reactant for delivery from a storage tank to a gas generating system has at least one pump. An operating medium for applying pressure to the reactants is delivered from the pump to the storage tank via a pipe system. The operating medium itself may also be delivered to a reaction chamber as a reactant of the gas generating system.

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Esslingen, Germany

Andreas Docter