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Artículo

Alternative designs for a catalytic converter operating under autothermal conditions

Lopez, EduardoIcon ; Errazu, Alberto FelipeIcon ; Borio, Daniel OscarIcon ; Bucala, VeronicaIcon
Fecha de publicación: 06/2000
Editorial: Pergamon-Elsevier Science Ltd
Revista: Chemical Engineering Science
ISSN: 0009-2509
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

This paper focuses on the study of two different autothermal designs of a catalytic combustor, based on natural gas oxidation for heat generation. The feed is preheated by means of two different alternatives: (a) indirect heat exchange between the products and feed streams (Design I), (b) direct heat exchange by recycling a fraction of the hot gases leaving the catalytic combustor (Design II). Steady-state and dynamic results have demonstrated that autothermal catalytic units, after an appropriate start-up procedure, can operate with high methane conversion, without exceeding the maximum allowable temperature and minimizing harmful emissions such as NO(x) (to preheat the reactants, the flame of conventional units is replaced by a heat feedback of a fraction of the total heat generated by the catalytic combustor). Due to the dilution originated by the recycle stream (which admits the use of higher methane molar fractions in the fresh feed stream) Design II appears as the most convenient alternative because it can provide significantly higher heat fluxes than Design I for the same process constraints. Moreover, Design II can provide an exit stream at the highest thermal level (for a given maximum allowable temperature) feasible for an autothermal converter.
Palabras clave: Autothermal Reactor , Catalytic Combustion , Catalytic Combustor , Monolith
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/37689
URL: https://www.sciencedirect.com/science/article/pii/S0009250999004777
DOI: http://dx.doi.org/10.1016/S0009-2509(99)00477-7
Colecciones
Articulos(PLAPIQUI)
Articulos de PLANTA PILOTO DE INGENIERIA QUIMICA (I)
Citación
Lopez, Eduardo; Errazu, Alberto Felipe; Borio, Daniel Oscar; Bucala, Veronica; Alternative designs for a catalytic converter operating under autothermal conditions; Pergamon-Elsevier Science Ltd; Chemical Engineering Science; 55; 12; 6-2000; 2143-2150
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