![Adblue (DEF) Chemistry and Operation in winter time](https://d91ztqmtx7u1k.cloudfront.net/ClientContent/Images/Large/20240229072818-0e257222-280b-466f-aaa4-9bb9f1af1f1f.jpeg)
The ratio between NO2 and NO determines which reactions take place and how fast. The highest conversion rates are achieved if equal amounts of NO2 and NO are present, especially at temperatures between 200°C and 350°C. If there is more NO than NO2, fast SCR and standard SCR take place sequentially. Read More
![Adblue Urea Plant, DEF Plant, Liquid Urea Plant, Diesel Exhaust Fluid](https://d91ztqmtx7u1k.cloudfront.net/ClientContent/Images/Large/20240228105656-a6974cb5-bc7a-4dcc-9863-f23dfd7fa9a7.jpg)
What is exhaust fluid for a diesel? Diesel exhaust fluid (DEF; also known as AUS 32 and marketed as AdBlue) 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. Read More