INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
COBALT-EXCHANGED MORDENITE ONTO A CORDIERITE HONEYCOMB FOR THE SCR - NO
Autor/es:
M. A. ERCOLI; J. M. ZAMARO; C. E. QUINCOCES; E. E. MIRÓ; M. G. GONZÁLEZ
Revista:
CHEMICAL ENGINEERING COMMUNICATIONS
Editorial:
Taylor & Francis
Referencias:
Año: 2007
ISSN:
0098-6445
Resumen:
Structured catalysts were prepared by deposition of cobalt-exchanged mordenite
films on the walls of cordierite monolith channels either by wash coating or by
hydrothermal synthesis. The aim of this work is to analyze different deposition techniques
and their influence on the catalytic activity. The catalytic activity of the
structured materials is compared with that of zeolite powder. The hydrothermal
synthesis was performed in situ in a pressured autoclave reactor varying the reaction
conditions (time, stirring degree). This technique consists in the crystallization of
mordenite on the cordierite honeycombs employed as a substrate. In order to analyze
the stirring effect, some of the samples were synthesized by stirring while others were
treated in a stagnant medium. The influence of time on reaction was estimated by
sampling at regular time intervals. Deposition by impregnation (wash coating)
was also performed by immersing the monolith into a suspension (2040 wt.%) with
Co-exchanged mordenite. The wash coating was performed under different conditions
(suspension concentration, incorporation of agglutinants, number of immersions) to
obtain a zeolite coating active and selective as catalyst for nitric oxide selective
reduction with hydrocarbons. The samples obtained by either method were characterized
by scanning microscopy, TPR, XRD, and catalytic activity for the SCR
of NOx with propane.
Co-exchanged mordenite. The wash coating was performed under different conditions
(suspension concentration, incorporation of agglutinants, number of immersions) to
obtain a zeolite coating active and selective as catalyst for nitric oxide selective
reduction with hydrocarbons. The samples obtained by either method were characterized
by scanning microscopy, TPR, XRD, and catalytic activity for the SCR
of NOx with propane.
Co-exchanged mordenite. The wash coating was performed under different conditions
(suspension concentration, incorporation of agglutinants, number of immersions) to
obtain a zeolite coating active and selective as catalyst for nitric oxide selective
reduction with hydrocarbons. The samples obtained by either method were characterized
by scanning microscopy, TPR, XRD, and catalytic activity for the SCR
of NOx with propane.
Co-exchanged mordenite. The wash coating was performed under different conditions
(suspension concentration, incorporation of agglutinants, number of immersions) to
obtain a zeolite coating active and selective as catalyst for nitric oxide selective
reduction with hydrocarbons. The samples obtained by either method were characterized
by scanning microscopy, TPR, XRD, and catalytic activity for the SCR
of NOx with propane.
Co-exchanged mordenite. The wash coating was performed under different conditions
(suspension concentration, incorporation of agglutinants, number of immersions) to
obtain a zeolite coating active and selective as catalyst for nitric oxide selective
reduction with hydrocarbons. The samples obtained by either method were characterized
by scanning microscopy, TPR, XRD, and catalytic activity for the SCR
of NOx with propane.
%) with
Co-exchanged mordenite. The wash coating was performed under different conditions
(suspension concentration, incorporation of agglutinants, number of immersions) to
obtain a zeolite coating active and selective as catalyst for nitric oxide selective
reduction with hydrocarbons. The samples obtained by either method were characterized
by scanning microscopy, TPR, XRD, and catalytic activity for the SCR
of NOx with propane.x with propane.