An object of the invention is to provide {HEAD ~ a process} for {TAIL ~ the production} of a high energy combustible gas from waste substances and other combustible materials which, because of their composition, e.g. their water content or pollutant combustion residues, are unsuitable for direct combustion, the resulting combustible gas being usable to drive internal combustion engines, more particularly gas turbines, the energy content of the charge being contained with a high efficiency in the generated combustible gas 
An object of the invention is to provide { HEAD ~ a process } for { TAIL ~ the production } of a high energy combustible gas from waste substances and other combustible materials which , because of their composition , e.g. their water content or pollutant combustion residues , are unsuitable for direct combustion , the resulting combustible gas being usable to drive internal combustion engines , more particularly gas turbines , the energy content of the charge being contained with a high efficiency in the generated combustible gas
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