Tracking AdBlue properties during tests of selective catalytic reduction (SCR) systems - the suitability of various analytical methods for urea content determination

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F20%3A43901260" target="_blank" >RIV/60076658:12310/20:43901260 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/er.4921" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/er.4921</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/er.4921" target="_blank" >10.1002/er.4921</a>

Result language

angličtina

Original language name

Tracking AdBlue properties during tests of selective catalytic reduction (SCR) systems - the suitability of various analytical methods for urea content determination

Original language description

Reliability tests of selective catalytic reduction (SCR) systems are performed extensively in industry. The aim of this work was to track the AdBlue properties when testing SCR systems under enhanced temperatures (around 80 degrees C). To extend and improve the current practice in the automotive industry, HPLC and titration were chosen to develop and optimize appropriate analytical methods for urea content determination in various AdBlue samples. We showed that the testing (temperature loading) of SCR systems is associated with changes of the properties of AdBlue such as conductivity, alkalinity, density, urea content and absorbance. Our results demonstrate the unsuitability of refractometry as a method for tracking urea concentration in AdBlue during tests of SCR systems. HPLC and titration proved to be accurate and precise methods to determine urea in untreated as well as in treated AdBlue samples. Both analytical methods are not affected by matrix effects - accuracy ranged from 96.6% to 100.0% and precision ranged from 0.18% to 3.24%. We showed that the process of testing SCR system is associated with changes of properties of AdBlue such as conductivity, alkalinity, density, urea content and absorbance. Our results provide compelling evidence of the necessity to extend the list of possible methods to determine the urea content in AdBlue given by ISO 22241-2 for the automotive industry. HPLC and titration were proved as accurate and precise methods for urea concentration determination.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Energy Research

ISSN

0363-907X

e-ISSN

—

Volume of the periodical

44

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

2549-2559

UT code for WoS article

000519301600008

EID of the result in the Scopus database

2-s2.0-85078636711