Cormetech, Inc.

Grace Gmbh & Co. Kg

Christian Trefzger

Chris E Difrancesco

Thomas W Hastings

Colby A Burtt

Mark L Schirmer

James C Altizer

William D Buynitzky

Raymond Oh

Edward F Kassman

Hans-Gerhard Fritz

Stephen M Lyons

Hans Hermann H&ouml;fer

Edward F Kassmann

Steve M Lyons

Josh Andreas

Chris Difrancesco

Edward Kassman

James Altizer

Briefly, in one aspect, a catalytic assembly described herein comprises a module comprising at least one layer of structural catalyst bodies having an inlet face for receiving a gas stream. A diffuser assembly is arranged a distance of greater than 50 mm from the inlet face, the diffuser assembly including at least one diffuser element comprising a plurality of apertures, wherein a ratio of aperture length (L) in the gas stream flow direction to aperture hydraulic diameter (D) is less than 1.

Diffuser assemblies and catalytic reactors comprising the same

In one aspect, catalyst modules are described herein comprises structural catalyst bodies having cross-sectional flow channel geometries and surface features for enhanced catalytic activity. In some embodiments, the catalyst modules and associated structural catalyst bodies are suitable for use in high particulate matter environments. Briefly, a catalyst module comprises a framework and a plurality of structural catalyst bodies positioned in the framework, a structural catalyst body comprising an outer peripheral wall and a plurality of inner partition walls forming individual flow channels of rectangular cross-section, the outer peripheral wall resistant to localized flexural failures induced by material between adjacent structural catalyst bodies of the module.

SCR catalyst modules and associated catalytic reactors

In one aspect, structural catalyst bodies comprising one or more gradients of catalytic material are provided herein. In some embodiments, a structural catalyst body described herein comprises an inner partition wall having a first surface and a second surface opposite the first surface, the inner partition wall having a gradient of catalytic material along the width of the inner partition wall.

Gradient catalyst compositions and applications thereof

Catalyst compositions and applications thereof

The present invention provides monolithic structural catalysts. The catalysts have a thin wall structure and are advantageous for catalyzing reactions of gaseous fluid or liquid fluid molecules, such as the denitration or selective catalytic reduction (SCR) of nitrogen oxides (NO) in combustion flue gases. In an embodiment, the honeycomb-like monolithic structural body includes catalytically active outer peripheral walls and a plurality of catalytically active thin-walled inner partition walls, the thin-walled inner partition walls adapted to enhance fluid flow through the monolithic catalytic body and to increase interaction of the fluid molecules with the catalyst body.

Catalyst systems

The present invention provides monolithic structural catalysts. The catalysts have a high open frontal area structure and composition advantageous for use in high particulate matter environments such as coal-fired industrial applications. In an embodiment, the present invention provides a monolithic structural catalyst body comprising a high open frontal area structure and composition that can achieve an efficient selective reduction of nitrogen oxides while minimizing the oxidation of sulfur dioxide wherein the structure of the catalyst body is resistant to plugging by particulate matter.

Catalyst systems advantageous for high particulate matter environments

A shaped zeolite-containing body, e.g., zeolite-containing monoliths, having high compressive strength is prepared from a particular class of siloxane-based binders in combination with zeolite, plasticizing agent, and methylcellulose. It has been discovered that when using the particular class of siloxane binder with the aforementioned components, the body formed therefrom can be processed and calcined at temperatures below 300&deg; C., thereby reducing costs typically seen with other processes for preparing shaped materials containing zeolite. The shaped bodies of this invention have been shown to have compressive strengths of at least 20 N/mm or more.

Shaped body of zeolite, a process for its production and its use

Growing community of inventors

Durham, NC, United States of America

Christian Trefzger