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 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

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

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial