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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 K and 830 K, characterized by the following features: (a) the fuel is contacted with at least one oxidant preheated to from 520 K to 880 K at a pressure, p, of .gtoreq.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 space 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 a technically relevant dwelling time t.sub.v of the mixture prepared in step (a) in the reaction space of t.sub.v >25 ms at p.ltoreq.1 bar, and dwelling 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, M.multidot.c.sub.p, to the product of fuel mass flow, M.sub.b, and heating value, H.sub.u, which is, in the adiabatic reaction space, M.multidot.c.sub.p /M.sub.b.multidot.H.sub.u >2.multidot.10.sup.-4 K.sup.-1, and/or through the reactor wall with a heat flow density, q, of q<85 kW/m.sup.2, whereby auto-ignition of the mixture is prevented, especially for a predictable period of time.

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First Claim