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1. (WO2017034467) METHOD AND EXHAUST TREATMENT SYSTEM FOR TREATMENT OF AN EXHAUST GAS STREAM
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Pub. No.: WO/2017/034467 International Application No.: PCT/SE2016/050799
Publication Date: 02.03.2017 International Filing Date: 25.08.2016
IPC:
F01N 3/035 (2006.01) ,F01N 3/20 (2006.01) ,F01N 9/00 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
3
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
02
for cooling, or for removing solid constituents of, exhaust
021
by means of filters
033
in combination with other devices
035
with catalytic reactors
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
3
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
08
for rendering innocuous
10
by thermal or catalytic conversion of noxious components of exhaust
18
characterised by methods of operation; Regulation
20
specially adapted for catalytic conversion
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
9
Electrical control of exhaust gas treating apparatus
Applicants:
SCANIA CV AB [SE/SE]; 151 87 Södertälje, SE
Inventors:
NILSSON, Magnus; SE
BIRGERSSON, Henrik; SE
Agent:
GARDEMARK, Niklas; SE
Priority Data:
1551108-227.08.2015SE
Title (EN) METHOD AND EXHAUST TREATMENT SYSTEM FOR TREATMENT OF AN EXHAUST GAS STREAM
(FR) PROCÉDÉ ET SYSTÈME DE TRAITEMENT DE GAZ D'ÉCHAPPEMENT POUR LE TRAITEMENT D'UN FLUX DE GAZ D'ÉCHAPPEMENT
Abstract:
(EN) According to the present invention a method and an exhaust treatment system, are provided for treatment of an exhaust stream, which results from a combustion in a combustion engine and comprises nitrogen oxides N0X. The method comprises a first oxidation of compounds comprising one or more of nitrogen, carbon and hydrogen in the exhaust stream. The method also comprises a determination of a value (NO2-1/NOx-1) det for a ratio between a first amount of nitrogen dioxide NO2_1 and a first amount of nitrogen oxides NOx-1 leaving a first oxidation catalyst after the first oxidation. The method also comprises a first supply of a first additive into the exhaust stream, which is actively controlled based on the determined value (NO2-1/NOx-1) det for the ratio. Subsequently, a first reduction of at least the first amount of nitrogen oxides NOx_1 is carried out through a catalytic reaction in a catalytic filter. This catalytic filter consists of a particulate filter with an at least partly catalytic coating with reduction characteristics. The catalytic filter is arranged to catch and oxidise soot particles, and to carry out the first reduction of the first amount of nitrogen oxides NOx_1·
(FR) La présente invention concerne un procédé et un système de traitement de gaz d'échappement, destinés au traitement d'un flux de gaz d'échappement, qui résulte d'une combustion dans un moteur à combustion et comprend des oxydes d'azote NOX. Le procédé comprend une première oxydation de composés comprenant un ou plusieurs éléments parmi l'azote, le carbone et l'hydrogène dans le flux de gaz d'échappement. Le procédé comprend également la détermination d'une valeur (NO2-1/NOx-1) det pour un rapport entre une première quantité de dioxyde d'azote NO2_1 et une première quantité d'oxydes d'azote NOx-1 laissant un premier catalyseur d'oxydation après la première oxydation. Le procédé comprend également une première alimentation d'un premier additif dans le flux de gaz d'échappement, qui est activement commandée en se basant sur la valeur déterminée (NO2-1/NOx-1) det pour le rapport. Par la suite, une première diminution d'au moins la première quantité d'oxydes d'azote NOx_1 est réalisée par l'intermédiaire d'une réaction catalytique dans un filtre catalytique. Ce filtre catalytique est constitué d'un filtre à particules avec un revêtement au moins partiellement catalytique présentant des caractéristiques de réduction. Le filtre catalytique est agencé pour saisir et oxyder des particules de suie, et pour mettre en œuvre la première réduction de la première quantité d'oxydes d'azote NOx_1·
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: Swedish (SV)