Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 136-148 |
| Seitenumfang | 13 |
| Fachzeitschrift | Separation and Purification Technology |
| Jahrgang | 2006 |
| Ausgabenummer | 49 |
| Publikationsstatus | Veröffentlicht - 15 Apr. 2006 |
| Extern publiziert | Ja |
Abstract
An Integrated Gasification Combined Cycle plant (IGCC) opens the well-proven and highly efficient combined cycle process to fossil fuels, like coal or heavy refinery residues. Such a plant thereby possesses a novel linkage of typical energy engineering related units, e.g. a gas turbine and typical process engineering parts, which in the present case is an air separation plant. Different responses from the connected components can cause undesired mass flow fluctuations within the system especially during changing load demands. The cryogenic rectification column, as the core of the air separation plant, strongly affects the system's transient behaviour. The upper part of such a heat-integrated double column, a packed column with structured packing, has therefore been more closely investigated in the present paper. For this purpose, a dynamic model of such a column has been developed which is also able to describe the pressure dynamics supposedly responsible for these mass flow fluctuations. The transient behaviour of the uncontrolled column is analysed and discussed with special regard to pressure dynamics. The column pressure responds to disturbances on two different time scales. The short-term response, which is in the range of 100-200 s, is governed by the transient behaviour of the fluid dynamics and is discussed in detail. The long-term response is dominated by the nonlinear dynamics of the concentration profiles. The time constant of this response depends strongly on the direction and intensity of the disturbance and takes from 10,000 up to several 100,000 s.
Schlagwörter
- Cryogenic air separation, Dynamic modelling, IGCC, Packed column, Pressure dynamics, Coal, Fluid dynamics, Fossil fuels, Gasification, Power plants
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Analytische Chemie
- Chemische Verfahrenstechnik (insg.)
- Filtration und Separation
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in: Separation and Purification Technology, Jahrgang 2006, Nr. 49, 15.04.2006, S. 136-148.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Modelling and dynamics of an air separation rectification column as part of an IGCC power plant
AU - Seliger, Beate
AU - Hanke-Rauschenbach, Richard
AU - Hannemann, Frank
AU - Sundmacher, Kai
N1 - Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/4/15
Y1 - 2006/4/15
N2 - An Integrated Gasification Combined Cycle plant (IGCC) opens the well-proven and highly efficient combined cycle process to fossil fuels, like coal or heavy refinery residues. Such a plant thereby possesses a novel linkage of typical energy engineering related units, e.g. a gas turbine and typical process engineering parts, which in the present case is an air separation plant. Different responses from the connected components can cause undesired mass flow fluctuations within the system especially during changing load demands. The cryogenic rectification column, as the core of the air separation plant, strongly affects the system's transient behaviour. The upper part of such a heat-integrated double column, a packed column with structured packing, has therefore been more closely investigated in the present paper. For this purpose, a dynamic model of such a column has been developed which is also able to describe the pressure dynamics supposedly responsible for these mass flow fluctuations. The transient behaviour of the uncontrolled column is analysed and discussed with special regard to pressure dynamics. The column pressure responds to disturbances on two different time scales. The short-term response, which is in the range of 100-200 s, is governed by the transient behaviour of the fluid dynamics and is discussed in detail. The long-term response is dominated by the nonlinear dynamics of the concentration profiles. The time constant of this response depends strongly on the direction and intensity of the disturbance and takes from 10,000 up to several 100,000 s.
AB - An Integrated Gasification Combined Cycle plant (IGCC) opens the well-proven and highly efficient combined cycle process to fossil fuels, like coal or heavy refinery residues. Such a plant thereby possesses a novel linkage of typical energy engineering related units, e.g. a gas turbine and typical process engineering parts, which in the present case is an air separation plant. Different responses from the connected components can cause undesired mass flow fluctuations within the system especially during changing load demands. The cryogenic rectification column, as the core of the air separation plant, strongly affects the system's transient behaviour. The upper part of such a heat-integrated double column, a packed column with structured packing, has therefore been more closely investigated in the present paper. For this purpose, a dynamic model of such a column has been developed which is also able to describe the pressure dynamics supposedly responsible for these mass flow fluctuations. The transient behaviour of the uncontrolled column is analysed and discussed with special regard to pressure dynamics. The column pressure responds to disturbances on two different time scales. The short-term response, which is in the range of 100-200 s, is governed by the transient behaviour of the fluid dynamics and is discussed in detail. The long-term response is dominated by the nonlinear dynamics of the concentration profiles. The time constant of this response depends strongly on the direction and intensity of the disturbance and takes from 10,000 up to several 100,000 s.
KW - Cryogenic air separation
KW - Dynamic modelling
KW - IGCC
KW - Packed column
KW - Pressure dynamics
KW - Cryogenic air separation
KW - Dynamic modelling
KW - IGCC
KW - Packed column
KW - Pressure dynamics
KW - Coal
KW - Fluid dynamics
KW - Fossil fuels
KW - Gasification
KW - Power plants
UR - http://www.scopus.com/inward/record.url?scp=33645216541&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2005.09.007
DO - 10.1016/j.seppur.2005.09.007
M3 - Article
AN - SCOPUS:33645216541
VL - 2006
SP - 136
EP - 148
JO - Separation and Purification Technology
JF - Separation and Purification Technology
SN - 1383-5866
IS - 49
ER -