Q & A > Question Details
Our problem relates to treated gas from Amine absorber. Our plant has SPONGE ABSORBER and water wash for heat stable salt. The treated gas H2S varies from 0 to 600 ppm at same amine flow/ temperature and plat throughput. What are the reasons for H2S variation and how do we bring H2S below 100 ppm?
 
Answers
08/08/2009 A: Pawan Gupta, Essar Oil Limited, Pawan.Gupta@essaroil.co.in
I suggest you check the delta temp of fuel gas and lean amine. If the delta is higher by more than 12 degC that time this problem occurs or the slug deposited on the tray surface so you go for online chemical cleaning of Amine absorber.
24/06/2009 A: Egbert van Hoorn, Hocon B V, Egbertvh@hotmail.com
There are two possibilities:
1) The most likely one is that the quality of your lean amine is variable. Do you run with a constant top temperature in the amine regnerator?
2) The second less likely possibility is that the amount of H2S/CO2 in the feed gas to the absorber is changing. A high level can overload the absorber.
Detailed modeling of your system can show which option is the problem.