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Recently a new innovative process developed by Procede Gas Treating B.V. has been commissioned at line 3 of the Twence plant, a Waste-To-Energy (WTE) plant located in the eastern part of the Netherlands. In this process the CO2, that usually is emitted to atmosphere, is in this new application, scrubbed from the flue gas and the obtained pure CO2 stream is used to produce a sodium bicarbonate slurry (SBC). Instead of the conventional SBC flue gas scrubbing process, where dry SBC particles are used, this SBC slurry will be injected to remove the acid components from the flue gas, before the gas is emitted to atmosphere. Due to the implementation of this process the carbon footprint of the Twence installation is reduced. The new SBC plant produces 8,000 tons of sodium bicarbonate annually and to produce this amount of SBC 2,000 ton per year CO2 is captured from the flue gas. The CO2 originates for about 50 percent from biomass.
Before this project was implemented Twence used solid sodium bicarbonate particles and this solid material was sprayed in the flue gas channel. In the new technology a 40 wt.-% bicarbonate slurry is produced and instead of SBC particles, this slurry is injected to remove the acidic impurities from the flue gas. The efficiency of this new spray technology with SBC slurry was tested at full scale – up to 1 ton/h slurry injection rate – at a Waste Power Plant in Bremen, Germany (BREWA). Initially the tests were started with the injection of dry SBC and slurry SBC, however, after some time the injection of dry SBC was stopped completely.
|Copyright:||© TK Verlag - Fachverlag für Kreislaufwirtschaft|
|Source:||Waste Management, Volume 6 (September 2016)|
|Autor:||Dr. Patrick Huttenhuis|
Professor Dr. Ir. Geert Versteeg
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