Patent ID: 6793693
Filing Date: 2004-09-21
Classification: B01B,C01B,F23C,F23D,F23M,H01M,Y02E

Abstract:
A process for the utilization of a fuel having an initial boiling temperature or prevailing initial boiling temperature range at 1 bar of between 231-830Â° K, characterized in that:(a) the fuel is contacted with at least one oxidant preheated to from at a pressure, p, of &gE;1 bar or at a lower pressure with a reduction of the temperature range, and a C/O molar ratio of between 1:0.14 and 1:25 in a reaction chamber to initiate exothermic prereactions in the form of a cool flame which cause only partial conversion of the fuel and oxidant even when the fuel and oxidant are homogeneously mixed; and (b) a kinetic reaction inhibition of the further reaction of the oxidizable mixture formed in the cool flame is provided by adjusting the technically relevant residence time tv of the mixture prepared in step (a) in the reaction chamber of tv>25 ms at p&lE;1 bar, and residence times which become shorter when the pressure is increased under otherwise equal conditions, and a limited heat dissipation from the reaction zone through an inert gas stream with a ratio of the heat capacity flow of the oxidant, {dot over (M)}Â·cp, to the product of fuel mass flow, {dot over (M)}b, and heating value, Hu, which is, in the adiabatic reaction space, {dot over (M)}Â·cp/{dot over (M)}bÂ·Hu>2Â·10âˆ’4 Kâˆ’1 and/or through the reactor wall with a heat flow density, {dot over (q)}, of {dot over (q)}<85 kW/m2, whereby auto-ignition of the mixture is prevented, especially for a predictable period of time.