Health & Environmental Research Online (HERO)


Print Feedback Export to File
2009046 
Journal Article 
Urea formation from carbon dioxide and ammonia at atmospheric pressure 
Xiang, X; Guo, Li; Wu, X; Ma, X; Xia, Y 
2012 
Yes 
Environmental Chemistry Letters
ISSN: 1610-3653
EISSN: 1610-3661 
10 
3 
295-300 
English 
WOS:000307547000010 
Urea synthesis, currently the largest use of carbon dioxide in organic synthesis, is conventionally operated at high pressure and high temperature. Here, we report for the first time that urea forms at atmosphere and ambient temperatures by negative corona discharge in gas phase. The conversion of CO 2 and yields of a solid mixture of urea and ammonium carbamate, which was identified by the 13C NMR spectrum, rise with reducing temperatures and increasing molar ratios of NH 3/CO 2 and discharge frequencies. The conversion of carbon dioxide was found to be 82.16 % at 20 °C and 1 atm with a molar flow ratio of n(NH 3)/n(CO 2) of 2.5. High pressure and high temperature as energy inputs are not necessary. © 2012 Springer-Verlag. 
Electronegative ions; Carbon dioxide; Ammonia; Urea synthesis; CO2 utilization; Anion reaction 
Other
• Harmful Algal Blooms- Health Effects
     April 2021 Literature Search
          WOS
          Scopus
          Saxitoxins
               WOS