A method and apparatus in accordance with the invention is described which comprises treating an engine (12) exhaust gas stream containing hydrocarbons and other pollutants. The method of this invention comprises the steps of flowing the exhaust gas stream through a catalytic member comprising a monolith body (16) having a first catalyst zone (18) and a second catalyst zone (28) therein to contact a catalyst in a first catalyst zone (18) to convert at least some of the pollutants in the exhaust gas stream into innocuous products. The exhaust gas stream is then discharged from the catalytic member and flowed through an adsorbent zone (24) to adsorb at least some of the hydrocarbon pollutants with an adsorbent composition. The exhaust gas stream is then discharged from the adsorbent zone (24) and flowed to the second catalyst zone (28) to convert at least some of the pollutants into innocuous products. The exhaust gas stream, so treated, is then discharged to the atmosphere through suitable discharge means. A preferred adsorbent is a zeolite, having a relatively high silica to alumina ratio and a low relative Bronsted acidity. The preferred adsorbent compositions comprise Beta zeolites. An oxidant such as air (32) may be added to the exhaust gas stream at a point upstream of the second catalyst zone.

Method and apparatus for treating an engine exhaust gas stream

The invention provides an intumescent sheet material comprising 20 to 80 dry weight percent of at least one unexpanded intumescent material, 10 to 40 dry weight percent of at least one processed vermiculite selected from ground expanded vermiculite and delaminated vermiculite, greater than 0 to 5 dry weight percent of inorganic fibers having diameters greater than 5 microns, and greater than 0 to 10 dry weight percent of organic fibers; wherein said sheet material comprises substantially no ceramic fibers of less than 5 microns.

Intumescent sheet material

The present invention in certain embodiments is directed to a catalytic substrate suitable for use in a number of applications, including as a substrate in a catalytic converter or a particulate filter. Another aspect of the present invention is a filtering substrate suitable for use in a number of applications, including as a substrate in a particulate filter, such as a diesel particulate filter (DPF), or diesel particulate trap (DPT). The invention also provides an improved substrate for removing and/or eliminating pollutants from the exhaust of combustion engines. The catalytic substrate and filtering substrate provide, in certain embodiments, improvements in removing pollutants from an exhaust gas. The improvements include one or more of the following: faster light-off period, depth filtration of PM, less backpressure, lower probability of clogging, ability to be placed in multiple locations in the exhaust system including the manifold or the head itself, high probability of catalytic reaction, high conversion ratios of NOx, HC, and CO, a faster burnoff of PM, minimization of catalyst material use, and the like.

Nonwoven composites and related products and methods

A fire barrier protected dynamic joint in a structure, and a method for installing the same. The fire barrier protected dynamic joint includes a flexible sheet of a fire barrier material and a adhesive material for bonding the sheet to an attachment area of the joint.

Fire barrier protected dynamic joint

A multilayer intumescent mat or sheet (30) is useful for mounting a pollution control device (20) or as a firestop In one aspect, the multilayer intumescent sheet of the invention comprises a non-moldable flexible non-intumescent layer and a non-moldable flexible intumescent layer comprising an intumescent material wherein the layers form a single sheet without the use of auxiliary bonding means The mat desirably includes a significant proportion of inorganic fiber containing shot, and small proportions of shot-free inorganic fiber and intumescent material In another aspect, the multilayer intumescent sheet of the invention comprises a first non-moldable intumescent layer comprising a first intumescent material and a second non-moldable intumescent layer comprising a second intumescent material, the first and second intumescent materials being different, wherein the layers form a single sheet without the use of auxiliary bonding means The invention also provides a pollution control device comprising a multilayer sheet of the invention disposed between a monolith and a housing

Multilayer intumescent sheet

An intumescent sheet material is provided containing vermiculite or other expandable mica. A process for mounting catalyst supports is described.

A process is provided for applying refractory wear-resistant interlocking tile to the inner surface of a circular to elliptical tubular casing and securing them in position by exertion of centripetal force from intumescence of an insulative sheet material between the tile and the casing exerting substantially uniform centrifugal and centripetal forces.

Process for wear-resistant ducts

A dual catalyst system comprises a cross-flow or countercurrent flow honeycomb ceramic body coated with two catalysts, for example, in one direction with a reducing catalyst and in the other direction with an oxidizing catalyst. Such a catalyst system may be mounted so that auto exhaust gases first pass through the reducing catalyst to reduce NOx and thereafter pass through the oxidizing catalyst to oxidize carbon monoxide and hydrocarbons. The heat from the latter reaction aids materially in providing suitable conditions for the first reaction.

Dual cross-flow catalyst system

Refractory catalyst supports are secured in metallic containers having different coefficients of thermal expansion by providing at least one layer of a resilient thermally resistant inorganic sheet material or paper between the support and casing and securing the paper and catalyst support in the container by foaming an inorganic material in the space between the sheet material or paper and catalyst support. A further layer of sheet material or paper may be provided adjacent the support with the foam between the separate layers of sheet material.

Johnson James R

Papers

Intumescent sheet material

Process for wear-resistant ducts

Dual cross-flow catalyst system

Method of containing a resiliently supported rigid ceramic catalyst support

Verfahren zum befestigen eines starren keramischen katalysatortraegers in einer metallischen umhuellung und katalysatorpatrone