Coupling Power Generation with Syngas-Based Chemical Synthesis

A Process Chain Evaluation from a Power Plant Viewpoint

verfasst von: Clemens Forman

Verlag: Springer Fachmedien Wiesbaden

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik"

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Über dieses Buch

Coupling power generation with syngas-based chemical synthesis according to the so-called ‘Polygeneration-Annex’ concept offers economic and technical benefits. Clemens Forman assesses the integration of incoming streams by the Annex plant from a power plant point of view across its full load range. Analyses are done by load-dependent flowsheet simulation. The pulverized lignite combustion power plant process is covered by two generic technical states: an existing 650 MW(el) power plant and a near future 1,100 MW(el) power plant with duo block design and dry lignite co-firing. Modeling comprises both the flue gas path and the water-steam circuit. Appropriate stream interfaces are identified and determined depending on the load status. The technical feasibility of integration can be proven.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction and Motivation

Abstract

Coal recently undergoes a massive image change. Ever since, it played the most important role as primary energy carrier besides petroleum not least because of its abundance worldwide. Being mainly used for electricity generation, this demand more than doubled in the past 40 years and nowadays has the highest share of 41 % (2014) among the other fuels [1]. Thus, coal can be considered as a cornerstone of the present wealth of industrial nations. The big drawback using coal mostly via combustion is the high release of CO₂ into the atmosphere.

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Chapter 2. Material Processing of Coal

Abstract

The transformation routes of coal are manifold. Depending on the raw coal composition, there are preferred process chains with their corresponding product ranges. Compared to petroleum refining almost any hydrocarbon substance of the chemical industry can be also derived from coal because key components for syntheses have an alternative coal-based production process. In the following subsections, further details about a material use besides the common energetic use of coal are provided. This includes the idea of coupling power generation with syngas-based chemical synthesis.

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Chapter 3. Reference Case Lignite-Fired Power Station

Abstract

The following framework provides an investigation of a lignite-fired power station. Two cases of generic power plants of different power class and design are considered in order to cover an evaluation for both current and future boundary conditions. Using the commercial simulation software EBSILON® Professional 11.04 [68], a subcritical unit of the kind built in the 1970s and an ultra-supercritical unit of the kind to be built after 2020 are modeled. Every process step in the model is typically represented by a particular component, which can be parameterized for design and off-design operation.

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Chapter 4. Syngas-Based Annex Plant

Abstract

Concerning the Annex plant, no modeling and simulation was conducted in this work. Instead, referring data was extracted from a separate/related study [18,141]. The results derive from calculations being carried out via the commercial simulation software Aspen® Plus V8.6. They are handled as fixed boundary condition and are provided in Section 5.

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Chapter 5. Coupling of Power Block and Annex Plant

Abstract

According to the description in Section 2.3 and the schemes of Figures 27–30 explained in Section 4, coupling power generation with syngas-based chemical synthesis means an exchange or integration of electricity, boiler feed water, steam, residual and sour gases, carbonaceous residue, and wastewater of various contamination. The latter is excluded from further consideration due to a lack of data. Furthermore, handling these streams is more a matter of costs and technological solutions (treatment) than of energetic evaluation.

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Chapter 6. Evaluation of Preferential Technology Combination

Abstract

Further CO₂ emissions can be prevented by incorporating external hydrogen from water electrolysis at the Annex plant, allowing a higher carbon retention in the chemical product. As described in Section 2.3, the additional electricity demand can be well satisfied during periods of high penetration of renewable energy sources. This improves the power plant’s load elasticity seen from the grid (↦ Section 2.3, Figure 4).

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Chapter 7. Summary and Conclusion

Abstract

Within the scope of this work, the coupling of power generation with syngas-based chemical synthesis was investigated according to the so-called ‘Polygeneration-Annex’ concept. The overall intention was to assess in detail the integration of incoming streams by the Annex plant from power plant point of view across its full load range. Analyses are done by flowsheet simulation.

Clemens Forman

Backmatter

Titel: Coupling Power Generation with Syngas-Based Chemical Synthesis
verfasst von: Clemens Forman
Verlag: Springer Fachmedien Wiesbaden
Electronic ISBN: 978-3-658-22609-1
Print ISBN: 978-3-658-22608-4
DOI: https://doi.org/10.1007/978-3-658-22609-1