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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

International Journal of Energy Research

ISSN

0363-907X

e-ISSN

—

Svazek periodika

44

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

2549-2559

Kód UT WoS článku

000519301600008

EID výsledku v databázi Scopus

2-s2.0-85078636711