Apparatus, system, and method for reducing NOx emissions on an SCR catalyst
A technology of SCR catalytic converters and catalytic converters, applied in chemical instruments and methods, exhaust devices, separation methods, etc.
Inactive Publication Date: 2013-05-01
CUMMINS INTPROP INC
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0010] Furthermore, many known SCR systems do not utilize an ammonia oxidation (AMOX) catalyst downstream of the SCR catalyst to convert at least some of the ammonia leaking from the SCR catalyst into N2 and other less hazardous compounds
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0048] Many of the functional units described in this specification have been labeled as modules in order to more particularly emphasize their implementation independence. For example, a module may be implemented as a hardware circuit comprising conventional VLSI circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices, such as field programmable gate arrays, programmable array logic, programmable logic devices, or the like.
[0049] Modules may also be implemented in software executed by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions, which may, for instance, be organized as an object, procedure, or function. However, the identified modules of the executable need not be physically located together, but may include distinct instructions st...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
According to one representative embodiment, an apparatus (130) for reducing NOx emissions in an engine exhaust gas stream of an engine system (10) having a selective catalytic reduction (SCR) system (150) with an SCR catalyst (152) positioned downstream of a reductant injector (192) includes a NOx reduction target module (300) and a reductant module (330). The NOx reduction target module is configured to determine a NOx reduction requirement (304). The reductant module is configured to determine the amount of reductant added to the exhaust gas stream to achieve the NOx reduction requirement. The amount of reductant added to the exhaust gas stream is a function of at least one ammonia storage characteristic of the SCR catalyst, at least one reductant-to-ammonia conversion characteristic, and a conversion capability of an AMOX catalyst (160) in exhaust receiving communication with the SCR catalyst.
Description
technical field [0001] The present disclosure relates to the control of nitrogen oxides (NO x ) emissions, and more particularly relate to the use of selective catalytic reduction (SCR) catalysts to control NO x devices, systems and methods. Background technique [0002] Emission regulations for internal combustion engines have become increasingly stringent in recent years. Specified NO for internal combustion engines x And particulate matter emissions are low enough that in many cases improved combustion technologies cannot meet emission levels. As a result, there has been a gradual increase in the use of aftertreatment systems on engines to reduce emissions. To reduce NO x emissions, NO x Reduction catalysts, including selective catalytic reduction (SCR) systems, for reducing NO x (NO and NO in some parts 2 ) into N 2 and other compounds. SCR systems use a reducing agent, usually ammonia, to reduce NO x . Currently available SCR systems can generate high NO ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20B01D53/94B01D53/58F01N3/10B01D53/56
CPCF02B37/16B01D2258/014B01D2251/2062B01D53/9495B01D2257/702F01N2560/021B01D2255/20723F01N2560/08B01D2257/502B01D2251/208B01D2258/012B01D2251/2067F02B37/18B01D2255/50F01N2560/06Y02T10/24B01D53/9409B01D53/9477B01D2255/20738F01N2560/026F01N3/208F01N2560/07B01D2255/20761F01N2900/1622Y02T10/12
Inventor 琼·M·威尔斯约翰·N·池王蔚文帕宁德拉·加里梅拉蒂莫西·R·弗雷泽阿卜杜尔·R·奥夫里乔·V·希尔利萨·A·法雷尔尼尔·W·柯里尔阿力克斯·叶泽列茨安德鲁·奥斯本
Owner CUMMINS INTPROP INC