Injecting CO2 that is diluted within water, into a coal seam, which allows for the sequestering and control of downhole CO2 within connected fractures without damaging the subterranean formation.

A wall-flow filter for inhibiting the emission of very fine nano-particles. The wall-flow filter includes a honeycomb body including an intersecting array of filter walls formed of a porous material and defining channels extending through the honeycomb body between an inlet face and an outlet face of the filter. The channels comprise a plurality of inlet channels that are open at the inlet face and plugged at the outlet face and a plurality of outlet channels that are open at the outlet face and plugged at the inlet face. A mixed metal oxide particle deposition is located on and/or in the filter walls of the wall-flow filter. The mixed metal oxide particle deposition comprises precious metals in an amount of less than 0.1 wt %.

An exhaust gas purification catalyst body for gasoline engine, having a high NH.sub.3 purifying performance after endurance, is provided. The exhaust gas purification catalyst body for gasoline engine, disclosed herein, is configured to be placed in an exhaust path for the gasoline engine. The exhaust gas purification catalyst body includes a base material, an NH.sub.3 adsorption layer containing proton-type zeolite, and a catalyst layer containing a catalyst noble metal. The NH.sub.3 adsorption layer is stacked with the catalyst layer so as to be located closer to the base material than the catalyst layer. The proton-type zeolite has a basic skeleton substantially consisting of 4-, 6-, and 8 membered rings.

A CeZr composite oxide contains cerium and zirconium, wherein an uneven distribution ratio of cerium atoms is 1.80 or less. A method for producing a CeZr composite oxide includes an acid treatment step of bringing at least one selected from the group consisting of sulfuric acid, nitric acid, and hydrochloric acid, in an amount of 4 to 28 parts by mass with respect to 100 parts by mass of the raw material composite oxide, into contact with the surface of a raw material composite oxide containing cerium and zirconium, and a calcination step of calcining the treated composite oxide obtained in the acid treatment step at 400 to 1200 C. for 5 to 300 minutes.

A catalyzed particulate filter is a filter that is arranged in an exhaust passage of an engine and captures particulate matter in exhaust gas, and includes a support that is porous, and a catalytic layer provided on a wall surface of the support, and the catalytic layer has a density of 2.0 g/cm.sup.3 or higher.

A surgical treatment system for contaminated air streams having particulate contamination, polar contamination and/or nonpolar contamination in the gas or vapor stream. A surgical smoke plume treatment system and method provide or define a multi-stage treatment process that mechanically filters the air stream, followed by nonpolar decontamination and then polar decontamination or treatment. The system may be used stand alone or incorporated and used with other surgical instruments or incorporated into an air handler adapted to decontaminate an air stream. A desiccant may optionally be used to remove water from the air stream.

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; a first catalytic region comprising a first platinum group metal (PGM) component supported on a first PGM support material, wherein the first PGM component comprises platinum and rhodium; and wherein the first PGM support material comprises ZrO.sub.2Al.sub.2O.sub.3.

Disclosed herein are exhaust gas treatment systems comprising a combustion engine, and a selective catalytic reduction article downstream of the combustion engine; wherein the exhaust gas treatment system does not have a diesel oxidation catalyst in fluid communication between the combustion engine and the selective catalytic reduction article, the exhaust gas treatment system does not have a catalyzed soot filter in fluid communication between the combustion engine and the selective catalytic reduction article, and the selective catalytic reduction article has one or more washcoats comprising a copper containing small pore zeolite having a silica to alumina molar ratio ranging from 5 to less than 30. Also disclosed are methods for exhaust gas treatment comprising contacting the exhaust gas with a disclosed exhaust gas treatment system.

A method for the manufacture of a catalytic gasoline particulate filter (GPF) for the treatment of exhaust gas from a gasoline engine is disclosed. The method comprises: coating a wall-flow filter substrate with a first washcoat slurry from a second face of the substrate to form a first coating disposed within the porous walls and extending from the second face for at least 50% of a length of a second plurality of channels; coating the wall-flow filter substrate with a second washcoat slurry from a first face to form a second coating disposed on the first plurality of inner surfaces and extending from the first face for at least 70% of a length of the first plurality of channels; and calcining the first coating and the second coating to form the catalytic GPF.

The invention relates to a method and an apparatus for purifying gas, wherein the gas which includes at least tars and/or undesired hydrocarbons is supplied to a catalytic treatment reactor which has at least one catalyst zone including at least one catalyst element with a catalyst, oxygen gas is fed into the catalyst element of the catalyst zone in the catalytic treatment reactor and is supplied through the catalyst element, the gas is arranged to flow to the catalyst zone and arranged to contact with the oxygen gas and the catalyst, and a purified gas is discharged from the catalytic treatment reactor. Further, the invention relates to the use of the method.