Amine Thermal Reclamation; Technology Development from Keywords: CO2 capture; amine; degradation; reclamation . amines during a reclaimer cycle. Amine reclaimer wastes (ARW) generated in CO2 capture processes demand suitable disposal means. Such wastes contain remaining amine, NH3 and other. Amine reclaimer wastes (ARW) generated in carbon capture and sequestration ( CCS) is categorized as a hazardous waste which needs proper disposal.
|Published (Last):||12 December 2013|
|PDF File Size:||2.47 Mb|
|ePub File Size:||5.80 Mb|
|Price:||Free* [*Free Regsitration Required]|
Login or Vote Anonymously. Dissolved oxygen concentration was wmine in . Where, Estimation of heat stable salts formation follows from the removal rates and stoichimetry of the reactions: The column has shell and tube typed exchangers in the downstream-end of the reclaimer system.
Oxidative degradation is the main form of MEA loss in a capture process. The energy associated with this reclaiming is 60MWth, approximately 0. The reclaimer is periodically discharged to empty the accumulated salts. Amien facility has been performing CO 2 capture from flue gas since [28;38]. This reaction model is a simplified one, since in reality there are numerous degradation products detected in amine reclaimer samples that could form heat stable salts.
An ordinary differential erclaimer ODE solver was used to solve the set of differential equations. The following model is a parametric model that aims to quantify the influence of gas impurities in the waste generated by the reclaimer unit. Therefore, only a reduced number of components were taken into account. Abstract Carbon dioxide CO2 capture in post-combustion by the use of amines is one amiine several technologies known to reduce the release of CO2 to the atmosphere when burning fossil fuels.
Corrosion in Amine Reclaimer System. The concentration taken for SO 2 is the gas phase concentration.
This paper describes the root cause failure analysis of severe corrosion and erosion in reclaimef reclaimer system including the overhead piping. The most effective techniques used to purify amine solutions include distillation thermal reclaimingion exchange and electrodialysis. Estimation of heat stable salts formation follows from the removal rates and stoichimetry of the reactions:. This reaction rate was used to estimated the MEA degradation rate at different O 2 concentrations in the Flue gas.
Vapour containing H2S, CO2, and sulfinol leave the top of the column and oxosolidone in the liquid phase, which in turn leaves at the bottom outlet of the column. Some features of this site may not work without it. The degradation products also interact with MEA molecules according to reactions 3 and 4.
In principle, the concentration of the amine in the reclaimer should be as low as possible.
There was a problem providing the content you requested
The oxidative pathways leads principally amime the formation of carboxylic acids reactions 1 and 2 are an example of degradation reaction. This study established the correlation between type of amine, type of flue gas, type of degradation products to be reclaimed, and type of reclaiming technology. This causes loss of valuable and expensive amine that has to be replaced together with reduced solvent performance. Improvements of the model are suggested.
Simulated data was compared to real reclaimer data to test how well the model explains the conditions in a ammine reclaimer. According to this results, the reference value taken 0.
Corrosion products Fe contaminated the sulfinol solution causing erosion of carbon steel and stainless steel parts of the column and the associated overhead piping and elbows. Estimation of MEA loss is done trough the following equations:.
The overall HSS formation rate is used for the mass balance over the reclaimer. Even though the simulated data did not fit the curves from the real data accurately, the simulations are believed to present the conditions in a reclaimer well. Further, the external tube of heat exchangers experienced severe corrosion due to corrosive environment by higher accumulation of H2S and CO2 in the inlet of the exchanger.
Reclaimee of the lean stream reclaimed: The table below shows the main performance characteristics of the capture plant and the lean reclaiker conditions for case 1B. Publisher Norges teknisk-naturvitenskapelige universitet, Fakultet for naturvitenskap og teknologi, Institutt for kjemisk prosessteknologi.
Appendix D Thermal reclaiming of amine systems | Global CCS Institute
The following reaction rate has been derived experimentally:. The technologies were compared and evaluated. It receives sour vapour from the 2nd reclaimer knock-out drum.
The other fraction will lead to degradation products or will be emitted in the CO 2 stream.
The following reactions show how the possible HSS are formed. To prevent these degradation products to accumulate, and to regain lost solvent, a reclaimer can be used to reclaaimer the contaminated amine solution. The reactions lead to degradation products and formation of HSS.
Amine reclaimer technologies
The second objective was to develop a model of a thermal reclaiming process for monoethanolamine MEA. Concentration and temperature profiles were obtained. The following assumptions were taken for the mass balance: Nevertheless, in many thermal reclaimers the concentration of amine is still high, transforming the thermal reclaimer more into a feed and bleed system .
Oxidative degradation rate depends on Temperature, oxygen concentration in the flue gas, MEA concentration, SO2 concentration in the flue gas and CO 2 loading . MEA degradation leads to many degradation compounds.