Effect of oxygen and additives on thermal decomposition of aqueous urea solution

Effect of oxygen and additives on thermal decomposition of aqueous urea solution The thermal decomposition of aqueous urea solution was studied in a lab-scale experimental system. The experimental research was focused on the effect of oxygen concentration and different additives on NH3 yields, N2O production, and CO concentration. Without oxygen or additives, the NH3 yields increased gradually as the temperature increased from 473K to 923K and remained approximately 60% in the temperature range of 923–1073K. Oxygen promoted the thermal decomposition process and enhanced the NH3 yields in the temperature range of 473–773K, but it brought about the oxidation of NH3 and led to significant decline of the NH3 yields when the reaction temperature was above 823K. The addition of Na2CO3 promoted the NH3 yields obviously, but it did not restrain the NH3 oxidation at high temperatures. Furthermore, Na2CO3 reduced the production of N2O and CO at 623–1073K. Similar to Na2CO3, the addition of NaNO3 also increased the NH3 yields and decreased the N2O and CO concentration. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Fuel Elsevier

Effect of oxygen and additives on thermal decomposition of aqueous urea solution

Loading next page...
 
/lp/elsevier/effect-of-oxygen-and-additives-on-thermal-decomposition-of-aqueous-10srzLJ7V4
Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier Ltd
ISSN
0016-2361
D.O.I.
10.1016/j.fuel.2016.04.018
Publisher site
See Article on Publisher Site

Abstract

The thermal decomposition of aqueous urea solution was studied in a lab-scale experimental system. The experimental research was focused on the effect of oxygen concentration and different additives on NH3 yields, N2O production, and CO concentration. Without oxygen or additives, the NH3 yields increased gradually as the temperature increased from 473K to 923K and remained approximately 60% in the temperature range of 923–1073K. Oxygen promoted the thermal decomposition process and enhanced the NH3 yields in the temperature range of 473–773K, but it brought about the oxidation of NH3 and led to significant decline of the NH3 yields when the reaction temperature was above 823K. The addition of Na2CO3 promoted the NH3 yields obviously, but it did not restrain the NH3 oxidation at high temperatures. Furthermore, Na2CO3 reduced the production of N2O and CO at 623–1073K. Similar to Na2CO3, the addition of NaNO3 also increased the NH3 yields and decreased the N2O and CO concentration.

Journal

FuelElsevier

Published: Sep 15, 2016

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off