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.
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The overall HSS formation rate is used for the mass balance over the reclaimer. Collections Institutt for kjemisk prosessteknologi .
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Oxidative pathways have been studied by several authors [29;30;52;53;54]. The oxidative pathways leads principally to the formation of carboxylic acids reactions 1 and 2 are an example of degradation reaction. This causes loss of valuable and expensive amine that has to be replaced together with reduced solvent performance.
When the oxidative degradation is assumed to be 0. Dissolved oxygen concentration was studied in . The degradation products also interact with MEA molecules according to reactions reclaomer and 4. Skip to main content.
Appendix D Thermal reclaiming of amine systems | Global CCS Institute
The table below shows the main performance characteristics of the capture plant and the lean solvent conditions for case 1B. Simulated data was compared to real reclaimer data to test how well the model explains the conditions in a thermal reclaimer.
The technologies were compared and evaluated. The following assumptions were taken for the mass balance: The most effective techniques used to purify amine solutions include distillation thermal reclaimingion exchange and electrodialysis.
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. Recommendations provided to control the observed corrosion within the acceptable limit are by limiting the operation of the column from continuous to intermittent as per original design and reclaimet required to upgrade with the better corrosion resistant material with sufficient economic justification.
The reclaimer is periodically discharged to empty the accumulated salts. This rcelaimer rate was used to estimated the MEA degradation rate at different O 2 concentrations in the Flue gas. According to this results, the reference value taken 0.
Corrosion in Amine Reclaimer System
The energy associated with this reclaiming is 60MWth, approximately 0. MEA is known reclaimeg degrade with different impurities in flue gas.
The following reaction rate has been derived experimentally:. The column has shell and tube typed exchangers in the downstream-end of the reclaimer system. The following reactions show how the possible HSS are formed. The concentration taken for SO 2 is the gas phase concentration. Fraction of the lean stream reclaimed: The reclaimer system was operated continuously, irrespective of the limit of oxozolidone content which is not as per the design specifications thereby increasing reclaomer exposure between carbon steel material parts of the system to the corrosive environment more than design.
Estimation of MEA reclaiker is done trough the following equations: It receives sour vapour from the 2nd reclaimer knock-out drum.
Appendix D Thermal reclaiming of amine systems
For case 4B the MEA degradation would be significantly larger 1. Estimation of heat stable salts formation follows from the removal rates and stoichimetry of the reactions:. The figure below show the results: Corrosion in Amine Reclaimer System. The other fraction will lead to degradation products or will be emitted in the CO 2 stream.
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.