Patent
Process and apparatus
Carl D Keith,John J Mooney +1 more
TLDR
In this paper, an initial honeycomb-type catalyst is used to purify exhaust gases from an internal combustion engine and an excess of extraneous fuel is fed to the initial catalyst to reduce nitrogen oxides to nitrogen.Abstract:
Exhaust gases from internal combustion engines are purified by catalytic treatment. The systems have an initial catalyst, preferably in a separate vessel near the engine, and a subsequently-in-line catalyst. Preferably, the catalysts are of the honeycomb-type. The exhaust gases and an excess of oxygen, with or without a supplemental fuel, are passed through the initial catalyst during the start-up of the engine to insure that the exhaust gases are purified more or less as soon as the engine begins operation. In order to reduce the amount of nitrogen oxides in the exhaust gas after start-up, an excess of extraneous fuel is fed to the initial catalyst to reduce nitrogen oxides to nitrogen. The subsequently-in-line catalyst serves to reduce the carbon monoxide and hydrocarbon contents of the exhaust gases.read more
Citations
More filters
Journal ArticleDOI
CO2 mitigation and renewable oil from photosynthetic microbes: a new appraisal.
TL;DR: In this paper, the authors report the results of a privately funded US$20 million program that has engineered, built, and successfully operated a commercial-scale (2 ha), modular, production system for photosynthetic microbes.
Patent
Exhaust Gas Control Apparatus for Internal Combustion Engine
Kenji Harima,Shigeki Miyashita +1 more
TL;DR: In this article, a first cylinder and a second cylinder are connected by a communicating pipe connecting the intermediate portion of the first exhaust pipe with an intermediate part of the second exhaust pipe, and an exhaust gas control catalyst is arranged downstream of the portion to which the communicating pipe is connected.
Patent
Exhaust gas cleaner and method for cleaning exhaust gas
TL;DR: In this article, an exhaust gas cleaner constituted by a first catalyst comprising a first porous inorganic oxide supporting an Ag component, a W component and a Pt component and optionally a second catalytic component supporting a P component alone or in combination with W component is presented.
Patent
Dual converter engine exhaust system for reducing hydrocarbon emissions
TL;DR: In this paper, an engine exhaust system and a method of controlling hydrocarbon emissions are provided. The system and method are based on the use of two catalytic converter chambers, a first chamber containing a catalytic material and a second chamber containing catalyst as well as molecular sieves capable of adsorbing hydrocarbons during engine start-up and of having hydro-carbons desorbed therefrom when the catalysts reach an effective converting temperature.
Patent
Zero platinum group metal catalysts
TL;DR: In this article, the authors proposed to improve the performance of nitrogen oxide reduction by exposing rich exhaust to catalysts systems comprising a catalyst, wherein the catalyst systems are free of platinum group metals.
References
More filters
Patent
Control system for an engine system
David M Boyd,Clarence G Gerhold +1 more
TL;DR: In this paper, secondary air flow to the converter is the variable utilized to control the performance of the converter and is regulated in response to the ratio of gas flow in respect to the engine of the system to secondary gas flow.
Patent
Control for an engine system
TL;DR: In this article, a control system for an engine system which utilizes solid oxygen-ion electrolyte oxygen sensing means to generate an electrical signal responsive to the oxygen content of exhaust gases of the engine which in turn is used to control regulating means to vary the character of the exhaust gases issuing from the engine.
Patent
Integrated engine exhaust emission control system
TL;DR: An integrated method for controlling and preventing the emission of noxious components in engine exhaust during all the various phases of the engine operating cycle, such as startup, normal operation, overload, and when the engine exhaust gas is at an abnormally elevated temperature is presented in this article.
Patent
Exhaust gas purification
James H. Jones,Ervin E Weaver +1 more
TL;DR: In this article, a process for the effective removal of carbon monoxide hydrocarbons and the oxides of nitrogen from the exhaust stream of mobile internal combustion engines is described, which is accomplished by passing the exhaust gas from an engine operating at near the stoichiometric fuel-air ratio through a high-temperature catalyst.