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Technologies such as Selective Catalytic Reduction (SCR) assists in complying with diesel emission limits for NOx. Diesel Exhaust Fluid (DEF) which is an aqueous urea solution plays an important role in SCR systems. DEF freezes at approximately −11 °C due to which it becomes a challenge to meet regulations which state that, NOx emissions must be under regulatory limits within 70 min of engine starting...
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