Abstract:
PROBLEM TO BE SOLVED: To provide an absorbing medium maintaining absorbing capacity over a long term, and to deacidify fluid streams. SOLUTION: This absorption medium contains at least one aliphatic amine and at least one non-hydroquinoid antioxidant. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
Disclosed is an absorbent for eliminating carbon dioxide from a gas flow. Said absorbent comprises an aqueous solution of at least one amine and at least one amino carboxylic acid and/or amino sulfonic acid. Additionally using an amino carboxylic acid or amino sulfonic acid reduces the amount of energy required for regenerating the absorbent.
Abstract:
The invention relates to a method for the deacidification of a fluid stream, containing acidic gases as impurities, whereby the fluid stream is brought into intimate contact with an absorption agent at a pressure of 0.5 to 20 bar in at least one absorption step, with the proviso that the absorption step and, in the case of multiple absorption steps, at least one of the absorption steps is carried out in an inert scrubbing column, the internal surface of which is essentially made from plastic or rubber.
Abstract:
DONDE EL PROCESO COMPRENDE: a)ABSORCION QUE CONSISTE EN PONER UNA CORRIENTE GASEOSA DE ALIMENTACION QUE CONTIENE CO2 EN CONTACTO GAS-LIQUIDO CON UN FLUIDO ABSORBENTE, SIENDO AL MENOS PARTE DEL CO2 PRESENTE EN LA CORRIENTE GASEOSA ABSORBIDA EN EL FLUIDO ABSORBENTE, PARA PRODUCIR (i)UNA CORRIENTE GASEOSA REFINADA CON CONTENIDO REDUCIDO DE CO2, Y ii)UN FLUIDO ABSORBENTE RICO EN CO2; Y, b) REGENERACION QUE CONSISTE EN TRATAR (ii) A UNA PRESION ENTRE 3 Y 10 BAR (PRESION ABSOLUTA) A FIN DE LIBERAR CO2 Y REGENERAR UN FLUIDO ABSORBENTE POBRE EN CO2 QUE SE RECICLA A (a); DONDE EL FLUIDO ABSORBENTE CONTIENE DE 0,5% A 20% EN PESO DE UNA CANTIDAD EFICAZ DE UN PROMOTOR DE LA ABSORCION DE CO2 (PIPERAZINAS, PIPERIDINA Y MORFOLINA) Y DE 20% A 60% EN PESO DE UNA ALCANOL-AMINA ALIFATICA TERCIARIA, DISTINTA DE N-METILDIETANOLAMINA QUE MUESTRA MENOS DE 5% DE DESCOMPOSICION CUANDO UNA SOLUCION ACUOSA DE LA MISMA A UNA CONCENTRACION DE 4 MOL/L SE MANTIENE DURANTE 300 HORAS EN UNA CONDICION DE EQUILIBRIO VAPOR-LIQUIDO A UNA TEMPERATURA DE 162°C Y UNA PRESION TOTAL DE 6,3 BAR (PRESION ABSOLUTA) CON CO-EXISTENCIA DE LA SOLUCION ACUOSA Y CO2. LA ALCANOL-AMINA ALIFATICA TERCIARIA NO CONTIENE EN SU ESTRUCTURA MOLECULAR UN ATOMO DE N SUSTITUIDO A LA VEZ CON UN RESTO 2-HIDROXIETILO Y UN RESTO METILO; O CONTIENE EN SU ESTRUCTURA MOLECULAR UN SOLO ATOMO DE N SUSTITUIDO CON UN RESTO HIDROALQUILO Y DOS RESTOS ALQUILO; Y ES N-ETILDIETANOLAMINA, 2-(DIMETILAMINO)-ETANOL, 2-(DIISOPROPILAMINO)-ETANOL, ENTRE OTROS
Abstract:
Method for simulation of mass transport controlled separation processes in which a core-film layer is used to describe a mass exchange taking place at a phase border (P). According to the approach, an iterative solution of an implicit differential equation system is undertaken for discretization of an observed transfer area (10) of the core-film layer, from which the differential equation system, especially based on the Stefan-Maxwell equation, is generated. An independent claim is made for a device for simulation of mass transport controlled separation processes in which a core-film layer is used to describe a mass exchange taking place at a phase border.
Abstract:
Disclosed is a method for deacidifying a fluid stream containing acidic gases as contaminants, according to which the fluid stream is brought into intimate contact with a washing liquid in at least one absorption step. Said washing liquid represents an aqueous solution containing a) tertiary aliphatic alkanolamines (alkanolamine A), at least 30 percent by weight of said tertiary aliphatic alkanolamines being 3-dimethylamino-1-propanol, and b) secondary aliphatic amines (activator B), at least 20 percent by weight of said secondary aliphatic amines being piperazin. The fluid stream which has been essentially purified of the acidic gases is then separated from the washing liquid that is loaded with acidic gases.
Abstract:
A description is given of an absorption medium for removing carbon dioxide from gas streams which comprises aqueous solution of an amine of the formula I HNR2 (I) where one or both radicals R are and the other radical R is hydrogen. The absorption medium is distinguished by particular oxidation resistance.
Abstract:
Disclosed is a method for deacidifying a fluid stream containing acidic gases as contaminants, according to which the fluid stream is brought into intimate contact with a washing liquid in at least one absorption step. Said washing liquid represents an aqueous solution containing a) tertiary aliphatic alkanolamines (alkanolamine A), at least 30 percent by weight of said tertiary aliphatic alkanolamines being 3-dimethylamino-1-propanol, and b) secondary aliphatic amines (activator B), at least 20 percent by weight of said secondary aliphatic amines being piperazin. The fluid stream which has been essentially purified of the acidic gases is then separated from the washing liquid that is loaded with acidic gases.
Abstract:
A process for removing acidic gas constituents, of the group consisting of CO2, H2S, COS, CS2 and mercaptans, from gases, in which, in an absorption step, a dirty gas rich in acidic gas constituents is brought into contact with an absorption medium, as a result of which a clean gas low in acidic gas constituents and an absorption medium laden with acidic gas constituents are obtained, the absorption medium used being a mixture comprisinga) from 0.1 to 50% by weight of one or more mono-cyclic or bicyclic nitrogen heterocycles which are unsubstituted and/or monosubstituted or poly-substituted on the carbon by OH, C1-C3 alkyl and/or C1-C3 hydroxyalkyl and which have from 5 to 14 ring atoms and 1 or 2 heterocyclically bound nitrogen atoms per ring as component A,b) from 1 to 60% by weight of a monohydric and/or polyhydric alcohol as component B,c) from 0 to 60% by weight of an aliphatic aminoalcohol as component C,d) from 0 to 98.9% by weight of water as component D,e) from 0 to 35% by weight of K2CO3 as component E,where the sum of components A, B, C, D and E is 100% by weight.