Urea plant off-gases as fuel
Urea plant off-gases as fuel
(OP)
Our urea plant off gases contain 33% ammonia,
15% hydrogen, 08% oxygen and 44% nitrogen. I was thinking to burn these gases in primary reformer of ammonia plant as fuel.Is this possible? How ammonia could be removed from these gases to increase concentration of hydrogen without spending much money?
Thanks
15% hydrogen, 08% oxygen and 44% nitrogen. I was thinking to burn these gases in primary reformer of ammonia plant as fuel.Is this possible? How ammonia could be removed from these gases to increase concentration of hydrogen without spending much money?
Thanks





RE: Urea plant off-gases as fuel
Ammonia is very soluble in water. I think a simple water scrubber would remove a great deal of the ammonia.
Milton Beychok
(Contact me at www.air-dispersion.com)
.
RE: Urea plant off-gases as fuel
Is the above mixture can be burn as it is? I heard that ammonia %age in air 16-30% is burnable. So the mixture of gases containing 33% ammonia, 15% hydrogen, 08% oxygen and 44% nitrogen will burn by mixing it with natural gas going to burners of primary reformer at ammonia plant or to the boilers of utility plant? what will be negative effects regarding burning process and environment.
Thanks.
RE: Urea plant off-gases as fuel
do you use air for passivation of the urea reactor, that may be a source of a safety concern in the transport of the gas.
we tried to recover this same stream in our plant (+1000 MTPD Urea) and tried to use natural gas to ensure we always stayed above the flamable limits of the gas. we gave up finally due to difficulties with operational upsets. this was several years ago and typical of the fertilizer business, we went cheap on the controls.
good luck
RE: Urea plant off-gases as fuel
Thanks.