Enhancing the energetic efficiency of MDEA/PZ-based CO2 capture technology for a 650 MW power plant: Process improvement

Zhao, Bin; Liu, Fangzheng; Cui, Zheng; Liu, Changjun; Yue, Hairong; Tang, Siyang; Liu, Yingying; Lu, Houfang; Liang, Bin

doi:10.1016/j.apenergy.2016.11.009

Cited by 179 publications

(59 citation statements)

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“…1 Organic alkanolamine has become established as one of the most commonly used absorbents, and it has been developed and industrialized in present CO 2 separation and recovery devices. 2,3 Presently, the traditional alkanolamines -Monoethanolamine (MEA), Diethanolamine (DEA) and N-Methyldiethanolamine (MDEA) -applied at the industrial scale are considered to be the irreplaceable, efficient and the least expensive absorbents. 4,5 In particular, MEA has been applied widely in the decarburization process due to its capture performance advantages, including relatively faster absorption rate, higher absorption capacity and smaller size of equipment.…”

Section: Introductionmentioning

confidence: 99%

Fast screening of amine/physical solvent systems and mass transfer studies on efficient aqueous hybrid MEA/Sulfolane solution for postcombustion CO₂ capture

Zou

Gao

Wu³

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The addition of a physical solvent to a traditional chemical absorbent has been shown to improve the absorption and desorption performance of the absorbent system. This type of novel absorbent system combining a single physical solvent with an amine solvent is a promising development in the industrial application of CO 2 capture. RESULTS: Hybrid solutions composed of Monoethanolamine (MEA), a physical solvent, and H 2 O were comprehensively investigated using the rapid solvent screening apparatus and a VLE apparatus. The results show that 30 wt% MEA with 20 wt% Sulfolane and 50 wt% H 2 O achieved higher rich loading, strong cyclic CO 2 capacity and the highest desorption rate over a wide range of CO 2 loadings. Also, the mass transfer performance of CO 2 absorption into the 30 wt% MEA and 20 wt% Sulfolane solution was investigated in a lab-scale random packing column. The effects of liquid flow rate, liquid feed temperature, lean CO 2 loading, inert gas flow rate and CO 2 partial pressure on the mass transfer performance were evaluated in terms of volumetric overall mass transfer coefficient (K G a v ). Furthermore, a correlation was developed for CO 2 absorption into MEA/Sulfolane solution in a random packing column using semi-empirical models as functions.CONCLUSION: Unlike for amine solution alone, inert gas flow rate is an indispensable operating parameter in the MEA/Sulfolane system. A mass transfer correlation model was established and holds significance in studying the kinetics of CO 2 absorption by a mixture of physical and chemical solvents and for the optimal design of Dixon-ring random packing columns. Industry ratus shown in Fig. 1. From the beginning of this experiment, a water saturation chamber and a reactor loaded with 15 mL hybrid solution were put into the water bath with the temperature kept at 313.15 K. Then a gas blend of CO 2 and N 2 with CO 2 partial pressure J Chem Technol Biotechnol 2020; 95: 649-664

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Section: Introductionmentioning

confidence: 99%

Fast screening of amine/physical solvent systems and mass transfer studies on efficient aqueous hybrid MEA/Sulfolane solution for postcombustion CO₂ capture

Zou

Gao

Wu³

et al. 2019

J of Chemical Tech & Biotech

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“…Alkanolamine solvents, such as 30% monoethanolamine (MEA) solvent, which possess the characteristic of quick absorption, large absorption capacity, and simple regeneration, have been used widely in postcombustion capture (PCC) . However, this process still raises the question of high energy consumption because of the high heat duty for solvent regeneration, which accounts for nearly 60–80% of the total running cost for a CO 2 capture process …”

Section: Introductionmentioning

confidence: 99%

“…Zhao et al . have investigated the CO 2 capture and stripping process, and they found that absorber inter‐cooling, rich‐split, advanced rich‐split, and striper inter‐heating processes could significantly improve energy efficiency . The heat duty of reboiler is 2.24 GJ/t CO 2 after optimization, which is ∼ 27.7% lower than the initial process.…”

Section: Introductionmentioning

confidence: 99%

“…3,4 However, this process still raises the question of high energy consumption because of the high heat duty for solvent regeneration, which accounts for nearly 60-80% of the total running cost for a CO 2 capture process. 5 Many efforts have been made to reduce the energy consumption of the CO 2 capture process by enhancing the stripping process. For instance, Li et al simulated a MEA regeneration process with improvements to the absorber inter-cooling process, the rich-split process, and the stripper inter-heating process, and the total reboiler duty was reduced from 3.6 MJ/kg CO 2 to 3.1 MJ/kg CO 2 .…”

Section: Introductionmentioning

confidence: 99%

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On the role of solid particles in CO₂ bubble nucleation for solvent regeneration of MEA‐based CO₂ capture technology

Liu

Tang

et al. 2019

Greenhouse Gases

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Monoethanolamine (MEA) solution has been used widely in the post‐combustion CO2 capture process; however, the high heat duty and reaction temperature (e.g. 125°C) for MEA regeneration leads to a high energy requirement (nearly 70–80% of the total running cost). We report the use of solid particles (H‐Zeolite Socony Mobile‐5 (HZSM‐5), quartz, and activated carbon) to facilitate the mass transfer of CO2 bubble nucleation and enhance the CO2 desorption rate. The results show that the mass transfer of CO2 from liquid phase to gas phase is the rate‐determining step, rather than the chemical reaction. The addition of HZSM‐5 particles in the solution significantly enhanced CO2 bubble nucleation by providing nucleation sites and gas cavities, leading to an average CO2 desorption rate enhancement of 43.2%, and an energy consumption reduction of 23.3%. This process also operated at ∼95°C, which is a much lower temperature than that used in the commercial process and is feasible for industrial applications. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…Various methods have been used to improve these problems. Zhao et al [16] studied different concentrations of amine to absorb acid gas, but the energy saving was not very good. Gutierrez et al [17] used Aspen HYSYS and Aspen plus to simulate the process of natural gas sweetening in northern Argentina and analyzed CO 2 mole fraction in absorber and regenerator; however, they did not say how to effectively reduce process energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of a Novel Two-Stage Flashing Process for Acid Gas Removal from Natural Gas

et al. 2019

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Excessive CO2 content will reduce the natural gas calorific value and increase the energy consumption of the regenerator in natural gas desulfurization and decarbonization. This paper uses Aspen HYSYS to model a novel two-stage flash process of acid gas removal process from natural gas. According to the results from the simulation, as well as running experiences in a natural gas processing plant in the middle east, it can be demonstrated that this new process, which has been used in the field of natural gas desulfurization and decarbonization, can meet the requirement of product specifications. Based on the steady state simulation, Aspen HYSYS sensitivity function is used to evaluate influence of key operating parameters, such as the second flash pressure and temperature, on the energy consumption. Compared to the traditional acid gas removal process and acid gas enrichment process, the new two-stage flash acid gas removal process has less energy consumption (2.2 × 109 kJ·h−1). In addition, two-stage flash acid gas removal process also improves the efficiency of acid gas enrichment, while the overall energy consumption is less than combination process of traditional process and acid gas enrichment process.

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Enhancing the energetic efficiency of MDEA/PZ-based CO2 capture technology for a 650 MW power plant: Process improvement

Cited by 179 publications

References 56 publications

Fast screening of amine/physical solvent systems and mass transfer studies on efficient aqueous hybrid MEA/Sulfolane solution for postcombustion CO₂ capture

Fast screening of amine/physical solvent systems and mass transfer studies on efficient aqueous hybrid MEA/Sulfolane solution for postcombustion CO₂ capture

On the role of solid particles in CO₂ bubble nucleation for solvent regeneration of MEA‐based CO₂ capture technology

Techno-Economic Analysis of a Novel Two-Stage Flashing Process for Acid Gas Removal from Natural Gas

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Enhancing the energetic efficiency of MDEA/PZ-based CO2 capture technology for a 650 MW power plant: Process improvement

Cited by 179 publications

References 56 publications

Fast screening of amine/physical solvent systems and mass transfer studies on efficient aqueous hybrid MEA/Sulfolane solution for postcombustion CO2 capture

Fast screening of amine/physical solvent systems and mass transfer studies on efficient aqueous hybrid MEA/Sulfolane solution for postcombustion CO2 capture

On the role of solid particles in CO2 bubble nucleation for solvent regeneration of MEA‐based CO2 capture technology

Techno-Economic Analysis of a Novel Two-Stage Flashing Process for Acid Gas Removal from Natural Gas

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Product

Resources

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Fast screening of amine/physical solvent systems and mass transfer studies on efficient aqueous hybrid MEA/Sulfolane solution for postcombustion CO₂ capture

Fast screening of amine/physical solvent systems and mass transfer studies on efficient aqueous hybrid MEA/Sulfolane solution for postcombustion CO₂ capture

On the role of solid particles in CO₂ bubble nucleation for solvent regeneration of MEA‐based CO₂ capture technology