ALIGN-CCUS: Results of the 18-Month Test with Aqueous AMP/PZ Solvent at the Pilot Plant at Niederaussem – Solvent Management, Emissions and Dynamic Behavior

15 Pages Posted: 26 Mar 2021

See all articles by Peter Moser

Peter Moser

RWE Power AG

Georg Wiechers

RWE Power AG

Sandra Schmidt

RWE Power AG

Juliana Garcia Moretz-Sohn Monteiro

TNO, NL

Earl Goetheer

TNO Information and Communication Technology in Delft

Charithea Charalambous

Heriot-Watt University

Ahmed Saleh

Heriot-Watt University

Mijndert van der Spek

University of Oslo

Susana Garcia

Heriot-Watt University

Date Written: February 8, 2021

Abstract

After a 13,000-hour test campaign with aqueous 30 wt% MEA (2-aminoethanol) solvent at the CO2 capture pilot plant at Niederaussem, another long-term test was carried out as part of the ALING-CCUS project. This test ran for more than 12,275 hours with aqueous AMP/PZ (2-Amino-2-methyl-1-propanol/piperazine) solvent, named CESAR1 (3.0 molar AMP (~ 26.74 wt%) and 1.5 molar PZ (~ 12.92 wt. %)). A minimum specific reboiler duty of 2,970 MJ/tCO2 was identified for the capture plant operation with four active absorber beds (total 16 m packing height). Neither a lower desorber pressure of 1.5 bar(a), instead of 1.75 bar(a), nor a change of the different positions of intercooling had a significant effect on energy consumption. Reduction of the active packing height to three beds (i.e., 12 m), resulted in a moderately higher specific energy demand (+100 MJ/tCO2). Tests with CO2 capture rates between 90 and 98% showed only a small increase of the specific energy demand at 95% (+20 MJ/tCO2) and four active packings (98%: + 250 MJ/tCO2). The average solvent consumption of CESAR1 during 400 days of operation was 0.45 kg/tCO2 and is lower than for MEA if the phase of accelerated non-linear degradation of MEA is taken into account. CESAR1 follows a slow-progressing linear degradation behavior; neither a critical metal ion concentration threshold value could be found that triggers fast degradation nor a correlation between accumulated trace components or metal ion concentrations in the solvent and the degradation rate was observed. Highly transient tests were conducted to investigate the dynamic behavior of the capture plant and subsequently special settings were chosen to stimulate high emissions for the investigation of aerosol-based emissions, connected with performance tests of several emission mitigation measures: single water wash, double water wash, acid wash, dry bed, wet electric precipitator and flue gas pre-treatment. When applying the dry bed configuration, emissions of AMP between 15 - 20 mg/Nm3, PZ between 3 - 7 mg/Nm3, and NH3 below 3 mg/Nm3 were achieved.

Keywords: AMP, piperazine, solvent consumption, solvent degradation, emissions, dynamic operation, pilot plant

Suggested Citation

Moser, Peter and Wiechers, Georg and Schmidt, Sandra and Garcia Moretz-Sohn Monteiro, Juliana and Goetheer, Earl and Charalambous, Charithea and Saleh, Ahmed and van der Spek, Mijndert and Garcia, Susana, ALIGN-CCUS: Results of the 18-Month Test with Aqueous AMP/PZ Solvent at the Pilot Plant at Niederaussem – Solvent Management, Emissions and Dynamic Behavior (February 8, 2021). Proceedings of the 15th Greenhouse Gas Control Technologies Conference 15-18 March 2021, Available at SSRN: https://ssrn.com/abstract=3812132 or http://dx.doi.org/10.2139/ssrn.3812132

Peter Moser (Contact Author)

RWE Power AG ( email )

Ernestinenstrasse 60
Essen, 45141
Germany

Georg Wiechers

RWE Power AG

Huyssenallee 2
Essen, 45128
Germany

Sandra Schmidt

RWE Power AG

Huyssenallee 2
Essen, 45128
Germany

Earl Goetheer

TNO Information and Communication Technology in Delft

Delft
Netherlands

Charithea Charalambous

Heriot-Watt University ( email )

Riccarton
Edinburgh EH14 4AS, Scotland EH14 1AS
United Kingdom

HOME PAGE: http://https://rccs.hw.ac.uk/

Ahmed Saleh

Heriot-Watt University

Research Centre for Carbon Solutions (RCCS)
School of Engineering and Physical Sciences
Edinburgh EH14 4AS, Scotland EH14 1AS
United Kingdom

Mijndert Van der Spek

University of Oslo

PO Box 6706 St Olavs plass
Oslo, N-0317
Norway

Susana Garcia

Heriot-Watt University ( email )

Riccarton
Edinburgh EH14 4AS, EH14 1AS
United Kingdom

Do you have a job opening that you would like to promote on SSRN?

Paper statistics

Downloads
291
Abstract Views
469
rank
131,111
PlumX Metrics