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Galtür, Austria

Rabensteiner M.,University of Graz | Kinger G.,EVN AG | Koller M.,Andritz Group | Gronald G.,Andritz Group | Hochenauer C.,University of Graz
International Journal of Greenhouse Gas Control | Year: 2014

The application of new solvents enables a reduction in energy demand. The present work describes the testing of a 32wt% solution of ethylenediamine (EDA) in a pilot plant at the power plant in Dürnrohr, Austria. Through the use of the power plant' flue gas and the well-conceived dimensions of the test facility, industry-related conditions for full scale applications can be provided. The measurements are compared with results of an aqueous solution with 30wt% of monoethanolamine (MEA) as well as other measurements from literature. The high reaction rate of EDA has especially positive effects at high flue gas flow rates. A reduction of up to 11.5% of the required regeneration energy is possible. This property allows higher flow rates in the same column and therefore leads to a reduction in investment costs. The optimal liquid to gas ratio is 2.5l/m3 and is thus lower than when using MEA. As a result, fewer pumping and cooling demands are necessary for approaching the optimum operating point. © 2014 Elsevier Ltd.


Rabensteiner M.,University of Graz | Kinger G.,EVN AG | Koller M.,Andritz AG | Hochenauer C.,University of Graz
International Journal of Greenhouse Gas Control | Year: 2016

Piperazine (PIP) activated 2-amino-2-methyl-1-propanol (AMP) (28/17 wt% AMP/PIP) was investigated in a PCC test facility on the power plant in Dürnrohr, Austria. Through the use of real power plant flue gas and the well-conceived dimensions of the test facility, industry-related conditions for full-scale applications can be assured. The specific energy consumption for solvent regeneration can be reduced to 3.15 GJ/tCO2 (without absorber intercooler and multi-stage flash), resulting in an energy saving of 10% in comparison to 30 wt% monoethanolamine (MEA). The optimal solvent flow rate is 38% lower in comparison to that of 30 wt% MEA, resulting in less pumping demand. 28/17 wt% AMP/PIP shows a good performance especially at high flue gas flow rates because of piperazinés fast kinetics. The fast kinetics also have a positive effect in the reduction of the absorber height. Halving the absorber height still allows a performance similar to that of 30 wt% MEA. In contrast to the MEA-process, the energy demand remains constant when varying the desorber pressure. © 2016 Elsevier Ltd.


Schreiner M.,TU Bergakademie Freiberg | Kampichler G.,EVN AG | Krzack S.,TU Bergakademie Freiberg | Meyer B.,TU Bergakademie Freiberg
Fuel Processing Technology | Year: 2011

The Austrian utility company EVN AG is investigating possibilities to substitute part of the hard coal used in their Dürnrohr power station by biomass pyrolysis gas produced in an upstream rotary kiln at relatively low temperatures of ≤ 600 °C. A major advantage of the low temperature is the retention of alkalis and halogenes in the coke. The aim of the present work was to set up a working thermo-chemical computer model in order to calculate the possible effects that this co-firing may have on corrosion phenomena in the boiler. The work was carried out using the software packages FactSage ® and SimuSage ®. A model was successfully developed and validated using data from laboratory analyses as well as from the power station and a biomass pyrolysis test facility set up next to the plant. The results of the calculations show that the gas produced in the rotary kiln at the planned scale very likely does not pose any potential threat to the power plant. © 2010 Elsevier B.V. All rights reserved.


Rabensteiner M.,University of Graz | Kinger G.,EVN AG | Koller M.,Andritz Group | Hochenauer C.,University of Graz
Energy Procedia | Year: 2014

A test facility for the investigation of the CO2 post combustion process named CO2SEPPL (acronym for CO2 SEParation Plant) was erected in 2010 by EVN and ANDRITZ Energy & Environment at the EVN power plant station in Dürnrohr (Austria). Since the test facility has an absorber height on an industrial scale and operates with flue gas of a natural gas- or coal-fired boiler, realistic results can be achieved. The pilot plant is designed for a flue gas flow rate of 100 m3/hSTP. The test facility allows a variation of many operating parameters. A sensitivity analysis was carried out for each solvent. In addition to the standard solvent 30 wt% monoethanolamine (MEA), other aqueous solvents were investigated. Separation using aqueous solutions of the amines piperazine (PZ) and ethylenediamine (EDA) enables significant energy savings compared to 30 wt% MEA. In order to reduce emissions of harmful substances, absorbents with very low or non-existent vapor pressure were tested (sodium glycinate). These investigated solvents have a high energy demand because of poor mass transfer and slow kinetics. Experimental results are explained on the basis of physical/chemical solvent data and technical specifications of the pilot plant. © 2014 The Authors Published by Elsevier Ltd.


Rabensteiner M.,University of Graz | Kinger G.,EVN AG | Koller M.,Andritz Group | Gronald G.,Andritz Group | Hochenauer C.,University of Graz
International Journal of Greenhouse Gas Control | Year: 2015

37.6wt% piperazine (7molal) was investigated in a PCC-test facility on the power plant in Dürnrohr, Austria. Through the use of real power plant flue gas and the well-conceived dimensions of the test facility, industry-related conditions for full scale applications can be provided. Deviations from measurement results, generated on other test facilities in which piperazine was tested, are discussed scientifically. The specific energy consumption for solvent regeneration can be reduced to 3.17GJ/tCO2 (without absorber intercooler and multi-stage flash), resulting in an energy saving of 14% in comparison to 30wt% MEA. The low CO2 absorption heat of piperazine and the low sensible heat are crucial for the low energy consumption. The optimal solvent flow rate is 20% lower in comparison to that of 30wt% MEA, resulting in less pumping and cooling demand.Especially for the regenerated solvent there is a risk of solidification. Even a small temperature reduction of the regenerated solvent in operation can lead to failure. A sudden system failure leads to a rapid solidification. Endangered areas have to be trace heated.A detailed parameter study and an emission measurement on the pilot plant will be presented in Part II of this paper. © 2015 Elsevier Ltd.

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