Direct catalytic decomposition of nitric oxide

Technical Report · Wed Jan 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/6788311· OSTI ID:6788311

Flytzani-Stephanopoulos, M; Sarofim, A F; Zhang, Y

This project investigates a suitable catalyst system for direct NO decomposition in post-combustion NO[sub x] control. Since the process does not use a reductant, it is a greatly simplified process basically involving passing the flue gas through a catalytic converter. Catalysts are prepared by incorporating metal cations into zeolite supports by ion exchange. Catalysts of primary interest include Cu, Pd, Ag, and Ni exchanged zeolites. Particular emphasis is given on promoted Cu-exchanged zeolites, especially the catalyst system Mg/Cu-ZSM-5 and a few others, which are promising for NO conversion to nitrogen at typical flue gas O[sub 2] and NO levels and over the temperature range of 723--873K. Effects of zeolite modification, Cu exchange level and catalyst preparation conditions on the catalyst activity are studied in a packed-bed microreactor. Temperature-programmed desorption and reduction experiments will be carried out in a thermogravimetric analyzer and a single-particle electrodynamic balance. Kinetic studies of NO and O[sub 2] interaction with catalysts over a wide temperature range as well as catalyst structural investigations are planned.

• Research Organization: Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-91PC91293
• OSTI ID: 6788311
• Report Number(s): DOE/PC/91293-T1; ON: DE93008107
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330701 -- Emission Control-- Nitrogen Oxides
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CATALYSTS
CATALYTIC CONVERTERS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CONTROL
COPPER IONS
DECOMPOSITION
DOCUMENT TYPES
EQUIPMENT
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
IONS
MAGNESIUM IONS
MATERIALS
MINERALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
PROGRESS REPORT
PROMOTERS
SILICATE MINERALS
SYNTHESIS
ZEOLITES