Stacked monolith reactor and process

• US 6,824,749 B2
• Filed: 12/18/2001
• Issued: 11/30/2004
• Est. Priority Date: 12/20/2000
• Status: Expired due to Fees

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Moreno, Maxime, Letourneur, Didier, Leloup, Jérôme, Woehl, Pierre
• Primary Examiner(s): NECKEL, ALEXA DOROSHENK
• Application Number:
  US10/029,738
• Publication Number:
  US 20020076372A1
• Time in Patent Office: 1,078 Days
• Field of Search: 422/168, 422/169, 422/170, 422/171, 422/176, 422/177, 422/180, 422/188-190, 422/193, 422/115, 422/211, 422/220, 422/222
• US Class Current: 422/220
• CPC Class Codes: B01J 10/007 in the presence of catalytically active bodies, e.g. porous plates
• CPC Class Codes: B01J 19/2485 Monolithic reactors
• CPC Class Codes: B01J 2219/32296 Honeycombs
• CPC Class Codes: B01J 2219/32466 comprising catalytically active material
• CPC Class Codes: B01J 2219/3322 Co-current flow
• CPC Class Codes: B01J 35/56 Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
• CPC Class Codes: F01N 13/0097 the purifying devices are arranged in a single housing
• CPC Class Codes: F01N 3/28 Construction of catalytic reactors
• CPC Class Codes: F01N 3/2821 the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence

Abstract

Methods and apparatus for treating a gas-liquid feed stream with structured monolithic catalysts of honeycomb configuration wherein the catalysts are configured as a stack of honeycomb sections with offset channels, the resulting channel dislocations between adjacent contacting honeycombs in the stack introducing controlled, limited turbulence and mixing of feed stream portions traversing the channels to significantly increase the catalytic efficiency of the reactor.

Claims

1. In the method for treating a gas-liquid feed stream in a structured monolithic catalyst reactor wherein a feed stream of combined gas and liquid is brought into contact with a honeycomb catalyst bed made up of multiple honeycomb sections, each section comprising parallel, open-ended honeycomb channels bounded by catalyst-containing channel walls extending from an inlet end to an outlet end thereof, the channels of both sections lying parallel to a common flow axis through the reactor, the improvement wherein:

the feed stream is directed past the inlet end and through a plurality of the honeycomb channels of the first section of catalyst as a plurality of feed stream portions, the feed stream portions comprising gas and liquid in a proportion effective to develop Taylor flow conditions within the honeycomb channels;

the feed stream portions are reacted against the catalyst-containing channel walls of the first section of catalyst and then discharged from the outlet end thereof;

each of a majority of the discharged feed stream portions is separated at the inlet end of the second section of catalyst into subdivided feed stream portions that are directed into a set of at least two parallel adjoining channels in the second catalyst section, the first and second catalyst sections being arranged in flow-connecting, end-to-end relationship with each other such that unchanneled flow of the feed stream portions is avoided;

the subdivided feed stream portions are reacted against the catalyst-containing walls of the second catalyst section; and

the thus-reacted subdivided feed stream portions are discharged from the second catalyst section.

2. A method in accordance with claim 1 wherein the feed stream portions are subdivided by the channel walls of the second catalyst section into from 2 to 4 subdivided feed stream portions at the inlet face of the second catalyst section.

3. A method in accordance with claim 1 wherein the gas and liquid are passed through the reactor in a co-current downflow mode.