Abstract: A reactor for supercritical water oxidation includes an essentially vertical reactor section and an essentially non-vertical reactor section. The vertical reactor section has a cross-sectional area which is substantially larger than the cross-sectional area of the non-vertical reactor section. The vertical reactor section has an inlet in an upper portion thereof for receiving a flow containing organic material and water, and an outlet in a lower portion thereof for outputting the flow. Both the vertical and the non-vertical reactor sections are configured to oxidize organic material in the flow through supercritical water oxidation.

Abstract: A method for supercritical water oxidation comprises the steps of: causing a first process stream containing water and organic material to flow in a reaction chamber (11); adding a first flow of oxidant to the first process stream in stoichiometric shortage; reacting the organic material in the first process stream with the oxidant; adding a second process stream containing water and organic material to the reacted first process stream, the second process stream having a temperature which is lower than a temperature of the first process stream to thereby reduce a temperature in the reaction chamber; adding a second flow of oxidant to the process streams; and reacting organic material in the first and second process streams with the second flow of oxidant.

Abstract: A reactor for supercritical water oxidation comprises an essentially vertical reactor section (11) and an essentially non-vertical reactor section (12), wherein the vertical reactor section has a cross-sectional area which is substantially larger than the cross-sectional area of the non-vertical reactor section. The vertical reactor section has an inlet (14) in an upper portion thereof for receiving (17) a flow containing organic material and water, and an outlet (16) in a lower portion thereof for outputting (20) the flow. Both the vertical and the non-vertical reactor sections are configured to oxidize organic material in the flow through supercritical water oxidation.

Abstract: A supercritical oxidation process carried out in water is capable of oxidizing “organics” in precious metal organic compositions such as heterogeneous (Pt/C) or homogeneous precious metal catalysts and producing a precious metal oxide with few by-products and low losses of precious metal.

Abstract: In a high pressure and high temperature reaction system suitable for oxidative waste treatment, particularly a reaction system for supercritical water oxidation (SCWO), a method is disclosed for injecting a first fluid of a first temperature at a first flow rate into a second fluid of a second temperature at a second flow rate, mixing the first and the second fluids within a mixing length (115, 215), and wherein the first and second temperatures and the first and second flow rates are selected such that a temperature of the mixed fluids downstream of said mixing length (115, 215) is obtained, at which said first fluid being substantially non-corrosive.

Abstract: A supercritical oxidation process carried out in water is capable of oxidising “organics” in precious metal organic compositions such as heterogeneous (Pt/C) or homogeneous precious metal catalysts and producing a precious metal oxide with few by-products and low losses of precious metal.

Abstract: An absorption machine and a method for operating the machine are disclosed. The absorption machine comprises an absorber (1) with heat-exchanger assemblies and a generator (2) with heat-exchanger assemblies, the generator (2) and the absorber (1) being interconnected by two conduits (8, 9). The absorber (1) and/or generator (2) are divided into at least two compartments which are in communication with one another and in which the different heat-exchanger assemblies have separate inlets and outlets. By means of the inventive machine, heating media of different temperatures can be obtained from the absorber (1) and waste heat of different temperatures can be used in the generator (2).