Wszystkie pola: NOx reduction catalyst - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Development project of a hydrogen fuelled internal combustion engine for heavy duty truck - outline and preliminary test
Autorzy:: Sato, Y.
Yanai, T.
Goto, Y.
Powiązania:: https://bibliotekanauki.pl/articles/246354.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engine
hydrogen engine
direct injection
NOx emission
NOx reduction catalyst
Opis:: The hydrogen fuelled internal combustion engine represent a promising solution to the issues of global warming, fossil fuel break point and environmental protection. The development of a hydrogen fuelled internal combustion engine for heavy-duty truck has been being carried out at Hydrogen Energy Research Centre (HERC) of Musashi Institute of Technology and National Traffic Safety and Environment Laboratory (NTSEL) since FY 2005 in the Next-Generation, Low-Emission Vehicle Development - Practical Implementation Project (EFV21) of Ministry of Land, Infrastructure and Transport (MLIT). As the most important key technology, the development of the common-rail type electronic high pressure hydrogen injectors is performed. Now the development of a hydrogen fuelled engine with 6 cylinders, the total displacement of 7.7 litters, direct injection and spark ignition is about to start. In this paper, the development concept, the characteristics of the injectors, some performance in the engine output power and the effects of nox reduction catalyst ever obtained experimentally by using a single cylinder engine are demonstrated.
Źródło:: Journal of KONES; 2007, 14, 3; 543-549
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Optimization of an active phase composition in the low-temperature nitric oxide reduction catalyst
Autorzy:: Kułażyński, M.
Bratek, K.
Walendziewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/777954.pdf
Data publikacji:: 2007
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: NOx
SCR
katalizator
optymalizacja
nośnik mineralno-węglowy
catalyst
optimization
mineral-carbon carrier
Opis:: In the first research studies series a selection of the quantitative composition of catalyst active phase composition (iron, copper and manganese) deposited on mineral-carbon support was carried out. It was found on the basis of the selection studies series that the best results were attained when copper and manganese were used as catalyst components. The quantitative composition of the denitrogention catalyst was estimated using a statistical method of experiment planning and metals content changed in the range 0.5 - 1.5wt % for both metals. Catalyst activity in nitric oxide reduction by ammonia was determined in the dependence on an active phase composition in the temperature range 100 - 200° C, at GHSV (Gas Hour Space Velocity) 6 000 and 10 000 Nm3/m3h, NO concentration 400 ppm, NH3/NO ratio 1:1. A graphic presentation of the obtained results was made using the UNIPLOT program. The highest activity in nitric oxide reduction by ammonia presented copper - manganese catalysts prepared by the impregnation of mineral-carbon support with active metals salts solutions and calcination after each metal impregnation with copper (up to 1.5 wt %) and manganese (up to 1.5 wt %).
Źródło:: Polish Journal of Chemical Technology; 2007, 9, 3; 33-37
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Estimation of nox conversion into oxide, platinum and combined oxide - platinum SCR catalyst
Autorzy:: Kamela, W.
Kruczyński, S.
Powiązania:: https://bibliotekanauki.pl/articles/246547.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
catalytic reactors
selective reduction
nitric oxides
air pollution
Opis:: The paper contains the results of the tests of the oxide, platinum and combined oxide-platinum catalytic reactor model used in the NH3-SCR system. As regards the combined oxide-platinum catalyst the first reactor block was extracted from the oxide catalyst used in trucks. As the second module of the reactor a block with platinum acting as a catalyst was used with 2.5g/dm3 platinum load. The only differences between the combined reactor system and the single platinum and oxide catalysts were connected with the reactors volume which in the case of the single reactors was two times higher than the volume of the corresponding blocks of the combined system. During the tests the ammonia concentration in the engine exhaust gases at the inlet of the reactors was set to 400 ppm. The article contains the results of the physical and chemical active surface structure tests of the reactors with their active surface chemical microanalysis and its topographic pictures performed and taken with the Scanning Electron Microscope. The results obtained from the tests of the influence of the reactor type on the NOX and NO conversion and the content of NO2 in NOX are presented in this article in the form of the function of their operating temperature. Additionally, the results of measured ammonia slip at the outlet of the reactors are presented. The obtained results have shown that the usage of the combined oxide-platinum reactor allows for widening the SCR system effective operating temperature range with a low ammonia slip at its outlet. This was achieved by use of the platinum reactor block which features a high nitric oxides conversion efficiency at the operating temperatures which are lower than those of the oxide catalyst and which can also provide the high ammonia spices conversion rangeto lower the ammonia slip at system outlet.
Źródło:: Journal of KONES; 2012, 19, 3; 195-202
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Directions in vehicle efficiency and emissions
Autorzy:: Johnson, T. V.
Joshi, A.
Powiązania:: https://bibliotekanauki.pl/articles/133977.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: greenhouse gases
vehicle emissions
regulations
engines
aftertreatment
NOx
diesel oxidation catalyst
selective catalytic reduction
diesel particulate filter
gasoline particulate filter
gazy cieplarniane
przepisy prawne
silniki
katalizator utleniania oleju napędowego
selektywna redukcja katalityczna
filtr cząstek stałych
Opis:: This paper provides a general review of light-duty (LD) and heavy-duty (HD) regulations, engine technology, and key emission control strategies. The US is placing a stronger emphasis on laboratory emissions, and the LD regulations are about an order of magnitude tighter than Euro 6, but Europe is focusing on real-world reductions. The California HD low-NO_x regulation is advancing and may be proposed in 2017/18 for implementation in 2023+. The second phase of US HD greenhouse gas regulations propose another 25-30% tightening beyond Phase 1, beginning in 2021. LD and HD engine technology continues showing marked improvements in engine efficiency. LD gasoline concepts are closing the gap with diesel. HD engines are demonstrating more than 50% BTE using methods that can reasonably be commercialized. LD and HD diesel NO_x technology trends are also summarized. NO_x storage catalysts and SCR combinations are the lead approach to meeting the LD regulations. Numerous advanced NO_x technologies are being evaluated and some promise for meeting the California HD low NO_x targets. Oxidation catalysts are improved for both diesel and methane oxidation applications. Gasoline particulate filters (GPF) are the lead approach to reducing particles from gasoline direct injection (GDI) engines. They reduce PAH emissions, and catalyzed versions can be designed for low back pressure. Regeneration largely occurs during hot decelerations.
Źródło:: Combustion Engines; 2016, 55, 3; 3-8
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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