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Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue [3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water .
While diesel fuel contains slightly more carbon (2.68 kg CO 2 /litre) than petrol (2.31 kg CO 2 /litre), overall, the CO 2 emissions of a diesel car tend to be lower due to higher efficiency. In use, on average, this equates to around 200 g CO 2 /km for petrol and 120 g CO 2 /km for diesel.
New York, United States, Feb. 03, 2025 (GLOBE NEWSWIRE) -- Selective catalytic reduction (SCR) is a sophisticated way of actively reducing emissions, wherein a catalyst is utilized to inject a liquid-reductant agent into the exhaust stream of a diesel engine. Diesel exhaust fluid (DEF) is urea designed for use in automobiles and is the most ...
Diesel fuel has many colloquial names; most commonly, it is simply referred to as diesel.In the United Kingdom, diesel fuel for road use is commonly called diesel or sometimes white diesel if required to differentiate it from a reduced-tax agricultural-only product containing an identifying coloured dye known as red diesel.
BlueTEC is Mercedes-Benz Group's marketing name for engines equipped with advanced NO x reducing technology for vehicle emissions control in diesel-powered vehicles.The technology in BlueTec vehicles includes a selective catalytic reduction (SCR) system that uses diesel exhaust fluid, and a system of NOx adsorbers the automaker calls DeNO x, which uses an oxidizing catalytic converter and ...
Dozens of diesel vehicle models are being investigated over concerns their emissions are higher than thought, the Department for Transport (DfT) has confirmed.
With an optimal diesel particulate filter (DPF), soot emissions may be decreased to 0.001 g/km or less. [10] The quality of the fuel also influences the formation of these particles. For example, a high sulphur content diesel produces more particles. Lower sulphur fuel produces fewer particles, and allows use of particulate filters.
The urea solution is also referred to as diesel exhaust fluid (DEF). Diesel exhaust contains relatively high levels of particulate matter. Catalytic converters remove only 20–40% of PM so particulates are cleaned up by a soot trap or diesel particulate filter (DPF). In the U.S., all on-road light, medium, and heavy-duty diesel-powered ...
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