Fixed and Capture Level Reduction operating modes for carbon dioxide removal in a Natural Gas Combined Cycle power plant

Moioli, Stefania; Pellegrini, Laura

doi:10.1016/j.jclepro.2020.120016

Cited by 20 publications

(5 citation statements)

References 33 publications

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“…According to our economic analysis results, the ZLD route is not economical compared to the SLD route. The same occurs also for carbon dioxide removal from flue gases from power plants to reduce the global warming effect because of the CO 2 emissions to the atmosphere. − Therefore, if China had not enforced a ZLD policy, enterprises in China would not have chosen the ZLD route because of the costs.…”

Section: Results and Discussionmentioning

confidence: 99%

Sustainability Analysis for the Wastewater Treatment Technical Route for Coal-to-Synthetic Natural Gas Industry through Zero Liquid Discharge Versus Standard Liquid Discharge

Yang

Hou

Meng

et al. 2020

ACS Sustainable Chem. Eng.

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In recent years, the rapid development of the coal chemical industry has triggered problems related to supply and demand imbalances of the regional water resources in China. Water resources have become the main bottleneck restricting the sustainable development of the coal chemical industry. To achieve cleaner production, China has issued policies on zero liquid discharge for the coal chemical industry, especially for coal gasification wastewater. However, to achieve zero liquid discharge targets, coal gasification companies have to add more processes to support and complete the sustainable reuse of wastewater. To scientifically evaluate this sustainability problem, in this study, we conducted a life cycle assessment of water consumption, costs, and environmental impacts for the zero liquid discharge route of the fixed-bed coal gasification wastewater treatment process. The results reveal that the total water consumption of the zero liquid discharge route is greater than the one of the standard liquid discharge route. Reusing 1 m 3 of water would consume an extra 1.64 m 3 of water. This is because of the large amount of indirect water consumption caused by the extra high power consumption. Moreover, the life cycle cost of the zero liquid discharge route is approximately twice that of the standard liquid discharge route while the total environmental impact is 1.15 times that of the standard liquid discharge route and 1.03 times for total human health impact. The zero liquid discharge route increases water consumption, incurs higher costs, and causes more serious environmental impacts. Therefore, the zero liquid discharge route does not meet the requirements of cleaner production and sustainable development.

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Section: Results and Discussionmentioning

confidence: 99%

Sustainability Analysis for the Wastewater Treatment Technical Route for Coal-to-Synthetic Natural Gas Industry through Zero Liquid Discharge Versus Standard Liquid Discharge

Yang

Hou

Meng

et al. 2020

ACS Sustainable Chem. Eng.

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show abstract

“…The typical trends of electricity consumption have been detailed in a previous work focusing on chemical absorption using an MEA solvent [36], and the analysis of the electricity price for the year taken as a reference in this work (2015) has been reported by Moioli et al [28].…”

Section: The Electricity Market In Italymentioning

confidence: 99%

“…An in-house tool developed by GASP of Politecnico di Milano for economic optimization, on the basis of the assumptions and the methodology detailed in Moioli et al [36], has been employed. The inputs to the tool are the results of the simulations in ASPEN Plus ® V11 that had been previously integrated with new ionic species and has been modified for the thermodynamic model by introducing reactions and values of parameters to represent the vapor-liquid-solid equilibrium of the potassium taurate system.…”

Section: Profit Minimizationmentioning

confidence: 99%

Techno-Economic Assessment for the Best Flexible Operation of the CO2 Removal Section by Potassium Taurate Solvent in a Coal-Fired Power Plant

Moioli,

Spatolisano,

Pellegrini

2024

Energies

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Alternative solvents based on aqueous solutions of amino acids have been recently developed as possible substitutes for Mono Ethanol Amine (MEA) for CO2 removal from flue gas streams. The potassium taurate solvent has the advantages of degradation resistance, low toxicity and low energy requirements for its regeneration. With any type of solvent, CO2 removal applied to a power production plant decreases the revenues obtained from selling electricity because of the energy requirements. Operating the CO2 removal section in flexible mode avoids significant effects on the profits of the power plant, while accomplishing environmental regulations. This work is the first journal paper focusing on the application in flexible mode of the potassium taurate system for treating a flue gas stream from a 500 MW coal-fired power plant. Techno-economic evaluations are performed to determine the best operating conditions considering the variation in the electricity demand and its price, and different values of carbon tax. In the summer period, with high electricity prices and demands, carbon tax values between 45 EUR/tCO2 and 60 EUR/tCO2 favor CO2 absorption in the flexible mode, without periods of full CO2 emissions during the day.

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“…Because of its high energy requirement, CO 2 capture represents a step toward affecting the overall efficiency of the plant. In coal-fired power plants, for instance, up to 30% of the power produced can be lost by running this section of the plant, so flexible operation may be considered to reduce the economic losses [54][55][56][57][58][59][60]. For a selected solvent, when operating at full capacity, to avoid uneconomic energy demands, it is fundamental to account for a careful design of the regeneration section by optimizing its configuration and its operating conditions.…”

Section: Co 2 Removalmentioning

confidence: 99%

CO2 Removal in Hydrogen Production Plants

Moioli,

Pellegrini

2024

Energies

Self Cite

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Hydrogen is an industrial raw material both for the production of chemicals and for oil refining with hydrotreating. It is the subject of increasing attention for its possible use as an energy carrier and as a flexible energy storage medium. Its production is generally accomplished in Steam Methane Reforming (SMR) plants, where a gaseous mixture of CO and H2, with a limited number of other species, is obtained. The process of production and purification generates relevant amounts of carbon dioxide, which needs to be removed due to downstream process requirements or to limit its emissions to the atmosphere. A work by IEAGHG focused on the study of a state-of-the-art Steam Methane Reforming plant producing 100 kNm3/h of H2 and considered chemical absorption with MethylDiEthanolAmine (MDEA) solvent for removing carbon dioxide from the PSA tail gas in a baseline scheme composed of the absorber, one flash vessel and the regeneration column. This type of process is characterized by high energy consumption, in particular at the reboiler of the regeneration column, usually operated by employing steam, and modifications to the baseline scheme can allow for a reduction of the operating costs, though with an increase in the complexity of the plant. This work analyses three configurations of the treatment section of the off gas obtained after the purification of the hydrogen stream in the Pressure Swing Adsorption unit with the aim of selecting the one which minimizes the overall costs so as to further enhance Carbon Capture and Storage in non-power industries as well.

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Fixed and Capture Level Reduction operating modes for carbon dioxide removal in a Natural Gas Combined Cycle power plant

Cited by 20 publications

References 33 publications

Sustainability Analysis for the Wastewater Treatment Technical Route for Coal-to-Synthetic Natural Gas Industry through Zero Liquid Discharge Versus Standard Liquid Discharge

Sustainability Analysis for the Wastewater Treatment Technical Route for Coal-to-Synthetic Natural Gas Industry through Zero Liquid Discharge Versus Standard Liquid Discharge

Techno-Economic Assessment for the Best Flexible Operation of the CO2 Removal Section by Potassium Taurate Solvent in a Coal-Fired Power Plant

CO2 Removal in Hydrogen Production Plants

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