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1. (US20030072708) Method for dual-fuel operation of a fuel-rich catalytic reactor

Office : United States of America
Application Number: 10246516 Application Date: 18.09.2002
Publication Number: 20030072708 Publication Date: 17.04.2003
Publication Kind : A1
IPC:
B01J 12/00
F23C 13/00
F23L 7/00
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
12
Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
C
METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN AIR
13
Apparatus in which combustion takes place in the presence of catalytic material
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
L
SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
7
Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
Applicants: SMITH LANCE L.
ETEMAD SHAHROKH
CASTALDI MARCO J.
KARIM HASAN UL
PFEFFERLE WILLIAM C.
Inventors: Smith Lance L.
Etemad Shahrokh
Castaldi Marco J.
Karim Hasan Ul
Pfefferle William C.
Agents: McCormick, Paulding &; Huber City Place II
Priority Data: 10246516 18.09.2002 US
60323488 19.09.2001 US
Title: (EN) Method for dual-fuel operation of a fuel-rich catalytic reactor
Abstract: front page image
(EN)

The present invention is a method for operating a fuel-rich catalytic reactor in a catalytic combustion system, wherein two different fuels having dissimilar reactivity are consecutively used. In this method, a fuel-rich fuel/air mixture comprising a first fuel contacts a catalyst to create a product stream and a heat of reaction. The reactor is operated such that mass transfer of oxygen to the catalyst surface limits the rate of catalytic reaction. The catalyst is backside cooled by a cooling stream comprising air that extracts at least a portion of the heat of reaction before contacting the product stream. The cooling stream flow is sufficient to completely combust all of the remaining fuel. A second fuel is then substituted for the first fuel, and the steps are repeated.