On the variability of CO2 feed flows into CCS transportation and storage networks

Spitz, Thomas; Avagyan, Vitali; Ascui, Francisco; Bruce, Alasdair; Chalmers, Hannah; Lucquiaud, Mathieu

doi:10.1016/j.ijggc.2018.04.008

Cited by 16 publications

(8 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In many jurisdictions it is expected, that power stations fitted with CCS technology will be required to operate in a significantly more flexible way than current fossil-fired power plants. This is likely to include responding to more significant changes in the variable electricity demand and supply by ramping up or down power output in real time (Bruce et al 2016, Spitz et al 2018, Mac Dowell and Staffell 2016, Brouwer et al 2016, Mechleri et al 2017b).…”

Section: Introductionmentioning

confidence: 99%

“…The techno-economic literature on flexible operation of CCS power plants is, however, generally separate from studies investigating the effect of this flexible operation on the downstream CO 2 transport and storage system (IEAGHG 2016, Jensen et al 2014, Roy et al 2016, Aursand et al 2017. Recently a study by Spitz et al (2018) found that regular bypass operation has the potential to further increase the variability of CO 2 flows in the transport and storage system, particularly at low carbon prices (i.e. £50/tCO 2 and lower).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Operating flexibility of natural gas combined cycle power plant integrated with post-combustion capture

Spitz

González-Díaz

Chalmers

et al. 2019

International Journal of Greenhouse Gas Control

View full text Add to dashboard Cite

Highly flexible, low-carbon electricity generation with gas-fired power stations with CO 2 capture addresses the challenges of balancing variable renewable electricity supply in low carbon electricity systems. This detailed technical assessment of flexible CO 2 capture plant operation at natural gas combined cycle power stations with post-combustion CO 2 capture examines the operating strategies of capture plant bypass and interim solvent storage. We show that solvent storage allows expanding the operating envelope of gas fired CCS power stations by +/-10%. Further we demonstrate that electricity and CO 2 output can be decoupled for up to 3 hours with approx. 6000 m 3 of additional solvent inventory for the purpose of reducing the CO 2 flow variability in downstream transportation and storage systems, mitigating potentially deleterious injection well effects. 1hr of solvent storage operation at full load can be regenerated in as fast as 2.1hrs during continuous operation of the CCS power plant by choosing a controlled steam extraction strategy from the combined cycle and thus throttling the low pressure turbine. The electricity output penalty associated with the delayed regeneration of solvent ranges from 420-450kWh/tCO 2 with this strategy, which compares to 380kWh/tCO 2 for immediate regeneration at full load design conditions. By deploying a novel variable speed drive integrally geared compressor model, we find that, unlike previously thought, an uncontrolled steam extraction strategy, referred as a floating steam extraction strategy, can lead to choking of the CO 2 compressor during additional solvent regeneration. A pre-compression stage would be necessary under this extraction strategy to restore feasible operation of the main CO 2 compressor, and makes this strategy more complex to implement. When decreasing the desorber pressure at part-load care must, therefore, be taken to respect the operating limits of the compressor. To assist with the use of rigorous plant performance data in wider electricity system models, correlations for key performance parameters of NGCC-CCS power plants at varying load, with capture bypass and additional solvent regeneration are provided.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Operating flexibility of natural gas combined cycle power plant integrated with post-combustion capture

Spitz

González-Díaz

Chalmers

et al. 2019

International Journal of Greenhouse Gas Control

View full text Add to dashboard Cite

show abstract

“…Between pipelines and carriers, which are the two most common methods of CO 2 transportation, pipelines have been the most widely used [5]. When transporting CO 2 to a pipe, a variable CO 2 transportation network is required for the flexible operation of the CCS chain, which is technically challenging [7,8]. Considering the flexibility of CO 2 carriers, however, the significance of carriers is likely to increase in the near future [9][10][11][12][13].…”

Section: Of 18mentioning

confidence: 99%

“…FFBD is graphical tool used to show the sequence of all functions that the system should perform. FFBD focuses the sequence of each function, not the time required or the flow of time between functions [8]. In FFBD, each function represented by a block is identified in terms of inputs and outputs [45].…”

Section: Functional Flow Block Diagram (Ffbd)mentioning

confidence: 99%

Conceptualization of CO2 Terminal for Offshore CCS Using System Engineering Process

Noh¹,

Kang²,

Huh

et al. 2019

Energies

View full text Add to dashboard Cite

In this study, the basic configuration and operation concept of a CO2 terminal were identified by conducting a system engineering process. The performance goal of a CO2 terminal was determined by requirement analysis. Then, functions and timelines were derived by functional analysis to meet the performance goal. Equipment to perform the functions were defined and finally, a process flow block diagram of the CO2 terminal was acquired. The CO2 terminal in this study consisted of three parts. First, the CO2 loading/unloading part is responsible for liquid CO2 unloading from the carrier and loading vapor CO2 onto the carrier. Secondly, the liquid CO2 transmission part extracts liquid CO2 from the storage tanks and increases the pressure until it satisfies the offshore pipeline transportation condition. The vapor-treatment part collects boil-off gas, generates vapor CO2, and charges the storage tanks with vapor CO2 to control the pressure of the storage tanks that discharge liquid CO2. Finally, the study results were compared with a liquefied natural gas (LNG) terminal. The biggest difference between the CO2 terminal in this study and the LNG terminal is that a vaporizer is essential in the CO2 terminal due to the smaller storage capacity of the CO2 terminal and, therefore, the lower amount of boil-off gas.

show abstract

“…Many capture technologies are now available for industrial applications such as pre-, post-combustion capture, oxyfuel combustion and solvent absorption [6,7,8,9]. However, they are not always directly installed at the CO 2 storage/reuse sites, indicating a need for CO 2 transportation network [10]. As the reliability and cost-effectiveness of the pipeline transport network are crucial to the overall operability and resilience of the CCUS system, it is vital to realize the possible corrosion risks of the employed pipeline steels corresponding to the impurity level of the gas source.…”

Section: Introductionmentioning

confidence: 99%

On the Corrosion Mechanism of CO2 Transport Pipeline Steel Caused by Condensate: Synergistic Effects of NO2 and SO2

2019

View full text Add to dashboard Cite

To study the effects of condensed acid liquid, hereafter referred to as condensate, on the CO2 transport pipeline steels, gas mixtures containing a varying concentration of H2O, O2, NO2, and SO2, were proposed and resulted in the condensate containing H2SO4 and HNO3 with the pH ranging from 0.5 to 2.5. By exposing the pipeline steel to the synthetic condensate with different concentration of acidic components, the corrosion kinetic is significantly changed. Reaction kinetic was studied using electrochemical methods coupled with water analysis and compared with surface analysis (scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffractometry (XRD)) of corroded coupons. The results showed that, although the condensation of NO2 in the form of HNO3 causes faster general corrosion rate, it is the condensation of SO2 in the form of H2SO4 or the combination of SO2 and NO2 that may cause much more severe problems in the form of localized and pitting corrosions. The resulting corrosion forms were depended on the chemical nature of acids and their concentration at the same investigated pH. The effects of changing CO2 flow rate and renewing condensate on pitting corrosion were further studied.

show abstract

On the variability of CO2 feed flows into CCS transportation and storage networks

Cited by 16 publications

References 22 publications

Operating flexibility of natural gas combined cycle power plant integrated with post-combustion capture

Operating flexibility of natural gas combined cycle power plant integrated with post-combustion capture

Conceptualization of CO2 Terminal for Offshore CCS Using System Engineering Process

On the Corrosion Mechanism of CO2 Transport Pipeline Steel Caused by Condensate: Synergistic Effects of NO2 and SO2

Contact Info

Product

Resources

About