Urea to ammonia process

摘要

Methods and systems for producing a pressurized ammonia-containing gas stream from aqueous urea. The method comprising pumping an aqueous urea-containing solution to a fluid-tight enclosure at a rate to match the external demand for ammonia-gas, wherein a fluid heat transfer medium is applied to the exterior of the fluid-tight enclosure to transfer heat to the aqueous urea-containing solution sufficient to hydrolyze the solution to an ammonia gaseous product. The systems comprise means for carrying out the methods.

主权项

1. A method adapted to provide a pressurized ammonia-containing gas stream from aqueous urea, the method comprising feeding an aqueous urea-containing solution to a fluid-tight enclosure at a rate to match the external demand rate for ammonia-gas, wherein a fluid heat transfer medium is present on the exterior of said fluid-tight enclosure to transfer heat to the aqueous urea-containing solution within the enclosure to hydrolyze the solution and convert the urea-containing solution to an ammonia gaseous product comprising ammonia, carbon dioxide and water vapor, the pressure within said fluid-tight enclosure being maintained by back pressure control to ensure that the ratio of urea and water is maintained independent of the ammonia generation rate, and the urea is converted.