Welcome to TradeChina
Adblue for SCR system
FOB Reference Price
Purchase quantity ()
Minimum order quantity
Payment
Meorient Import & Export Co.LTD
China - Hangzhou
Trading Company
Trade Capacity
Export Percentage
Nearest Port
Hangzhou,Shanghai
Accepted Delivery Terms
Employees
5-10人
Accepted Payment Currency
USD,CNY
Average Lead Time
45 Day(s)
Certifications
Product Specifications
--Product Description
Product Description
What is Adblue
Diesel exhaust fluid (DEF) is an aqueous urea solution made with 32.5% urea and 67.5% deionized water. It is standardized as AUS 32 (aqueous urea solution) in ISO 22241.[3] DEF is used as a consumable in selective catalytic reduction (SCR) in order to lower NOx concentration in the diesel exhaust emissions from diesel engines.
(NH2)2CO → NH3 + HNCO
The isocyanic acid hydrolyses to carbon dioxide and ammonia:
HNCO + H2O → CO2 + NH3
Overall, this is
(NH2)2CO + H2O → 2 NH3 + CO2
From this point, ammonia, in the presence of oxygen and a catalyst, will reduce nitrogen oxides:[6]
2 NO + 2 NH3 + 1⁄2 O2 → 2 N2 + 3 H2O and 3 NO2 + 4 NH3 → 3 1⁄2 N2 + 6 H2O
The overall reduction of NOx by urea is:
2 (NH2)2CO + 4 NO + O2 → 4 N2 + 4 H2O + 2 CO2 and 2 (NH2)2CO + 3 NO2 → 2 1⁄2 N2 + 4 H2O + 2 CO2
Diesel engines can be run with a lean burn air-to-fuel ratio (over stoichiometric ratio), to ensure the full combustion of soot and to prevent them exhausting unburnt fuel. The excess of air necessarily leads to generation of nitrogen oxides (NOx), which are harmful pollutants, from the nitrogen in the air. Selective catalytic reduction is used to reduce the amount of NOx released into the atmosphere. Diesel exhaust fluid (DEF) from a separate tank is injected into the exhaust pipeline, where the aqueous urea vaporizes and decomposes to form ammonia and carbon dioxide. Within the SCR catalyst, the NOx are catalytically reduced by the ammonia (NH3) into water ( H2O) and nitrogen (N2), which are both harmless; and these are then released through the exhaust.
DEF is a 32.5% solution of urea, (NH2)2CO. When it is injected into the hot exhaust gas stream, the water evaporates and the urea thermally decomposes to form ammonia and isocyanic acid:(NH2)2CO → NH3 + HNCO
The isocyanic acid hydrolyses to carbon dioxide and ammonia:
HNCO + H2O → CO2 + NH3
Overall, this is
(NH2)2CO + H2O → 2 NH3 + CO2
From this point, ammonia, in the presence of oxygen and a catalyst, will reduce nitrogen oxides:[6]
2 NO + 2 NH3 + 1⁄2 O2 → 2 N2 + 3 H2O and 3 NO2 + 4 NH3 → 3 1⁄2 N2 + 6 H2O
The overall reduction of NOx by urea is:
2 (NH2)2CO + 4 NO + O2 → 4 N2 + 4 H2O + 2 CO2 and 2 (NH2)2CO + 3 NO2 → 2 1⁄2 N2 + 4 H2O + 2 CO2
Detailed Images
Packing & Delivery
No desirable products?
Sourcing assistant>
How to start your business
- Step 1Find your interested products by search keywords
- Step 2Contact the supplier by clicking ”Enquire” or “request meeting” button, otherwise, you also could consult our import consultant.
- Step 3After verifying your email, get response from suppliers or our trade manager will contact you as soon as possible
- Step 4Set up meeting with the Chinese supplier without language barrier