TY - JOUR

T1 - Modellierung und Entwicklung der Dekarbonisierung von Abfallverbrennungsanlagen mit CO2-Bereitstellung

AU - Vodegel, Stefan

A2 - Büchner, Harm-Peter

A2 - Scharf, Roland

PY - 2022/12

Y1 - 2022/12

N2 - As part of the DrACO2 project a chemical-physical model of an amine scrubber for CO2 separation was created. The incoming gas comes from the flue gas cleaning of a commercial waste incineration plant. The CO2 obtained is to be made available as a salable product with a purity greater than 99 % at -20° C and 20 bar. The calculations show that a CO2 separation rate of 90 % can be achieved with the solvent MEA at a minimum concentration of 25 % by mass. However, even a slight dilution immediately leads to a significant reduction in the retention rate. According to the modelling, the CO2 capture as a function of the L to G ratio also has a curve with a sharp increase and a rapid flattening. A value of 3 was calculated for MEA for a separation efficiency of 90 %. Higher fluid circulation increases electrical demand without benefit. The simulations further confirm the fact that the energy demand for the CO2 capture from the flue gas and the conditioning of the gas is significant. In the model calculations, it is about 50 % of the boiler output even with the best possible solvent and system technology. About 63 % of this is thermal energy and 37 % is electrical energy, provided that it is produced in-house. The loss of boiler output is in contrast to the orientation of waste incineration plants as energy suppliers. Nevertheless, it can be stated that if the missing energy is replaced by natural gas, the climate balance with regard to CO2 remains clearly positive.

AB - As part of the DrACO2 project a chemical-physical model of an amine scrubber for CO2 separation was created. The incoming gas comes from the flue gas cleaning of a commercial waste incineration plant. The CO2 obtained is to be made available as a salable product with a purity greater than 99 % at -20° C and 20 bar. The calculations show that a CO2 separation rate of 90 % can be achieved with the solvent MEA at a minimum concentration of 25 % by mass. However, even a slight dilution immediately leads to a significant reduction in the retention rate. According to the modelling, the CO2 capture as a function of the L to G ratio also has a curve with a sharp increase and a rapid flattening. A value of 3 was calculated for MEA for a separation efficiency of 90 %. Higher fluid circulation increases electrical demand without benefit. The simulations further confirm the fact that the energy demand for the CO2 capture from the flue gas and the conditioning of the gas is significant. In the model calculations, it is about 50 % of the boiler output even with the best possible solvent and system technology. About 63 % of this is thermal energy and 37 % is electrical energy, provided that it is produced in-house. The loss of boiler output is in contrast to the orientation of waste incineration plants as energy suppliers. Nevertheless, it can be stated that if the missing energy is replaced by natural gas, the climate balance with regard to CO2 remains clearly positive.

M3 - Artikel

VL - 2022

SP - 34

JO - vgbe energy journal

JF - vgbe energy journal

SN - 1435-3199

IS - 12

ER -