Parametric investigation of CO2 capture from industrial flue gases using aqueous mixtures of ammonia (NH3) and potassium carbonate (K2CO3)

Pachitsas, Stylianos; Bonalumi, Davide

doi:10.1016/j.ijggc.2021.103567

Cited by 8 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To better solve the above problems, many scholars have proposed the modification of CO 2 absorption by ammonia solution using additives, which can inhibit not only NH 3 escape but also improve CO 2 absorption performance. Many scholars have studied the CO 2 capture performance of ammonia with additives [35][36][37][38][39][40][41], among which Gao and Zhang et al [39,41] have shown significant advantages in various aspects of using ethanol as an additive. Ammonia and additives can, to some extent, promote each other to improve the CO 2 uptake rate of ammonia [42].…”

Section: Ammonia-ethanol Mixture Absorbermentioning

confidence: 99%

Biochar Synergistic New Ammonia Capture of CO₂ and High-Value Utilization of Intermediate Products

Zhang¹,

Feng²,

Wu³

et al. 2023

Biochar - Productive Technologies, Properties and Applications

View full text Add to dashboard Cite

In the face of global warming and the urgent need for CO2 reduction, carbon capture, utilization, and storage, technology plays an important role. Based on the traditional liquid-phase and solid-phase CO2 capture technologies, the liquid-phase ammonia and biochar CO2 capture technologies are reviewed with emphasis. A multiphase carbon capture technology that uses biochar to enhance the mass transfer-crystallization process of the new ammonia CO2 capture technology is proposed. High CO2 capture efficiency, limited ammonia escape, and low system energy consumption can be achieved through the orderly construction of three-dimensional graded pore channels and the directional functionalization of biochar. The intermediate products of CO2 captured by the ammonia process and the special agricultural waste rice husk components were considered. The use of rice husk-based biochar for CO2 capture by synergistic new ammonia method and the process regulation of intermediate products to prepare nano-silica to achieve high-value utilization of interstitial products of carbon capture. This technology may be important to promote the development of CO2 capture technology and CO2 reduction.

show abstract

Section: Ammonia-ethanol Mixture Absorbermentioning

confidence: 99%

Biochar Synergistic New Ammonia Capture of CO₂ and High-Value Utilization of Intermediate Products

Zhang¹,

Feng²,

Wu³

et al. 2023

Biochar - Productive Technologies, Properties and Applications

View full text Add to dashboard Cite

show abstract

“…Thus, heat of vaporization becomes less significant because of the high pressures in the desorber column. This also results in less energy consumption for CO 2 compression . To operate columns at high desorber pressures, solvents with high thermal stability are necessary.…”

Section: Process Intensification Technologiesmentioning

confidence: 99%

“…This also results in less energy consumption for CO 2 compression. 111 To operate columns at high desorber pressures, solvents with high thermal stability are necessary. Piperazine, for instance, has a high absorption heat and can be operated at high desorber pressures.…”

Section: Solvents Used Formentioning

confidence: 99%

Process Intensification of CO₂ Desorption

Gecim

Ouyang

Roy

et al. 2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Anthropogenic climate change due to, among other causes, unhindered CO 2 emissions is a major concern worldwide. The postcombustion capture (PCC) process using a solvent, known as chemical absorption, is currently the most effective way to reduce CO 2 emissions from large point sources. However, high capital investment costs when using the conventional packed bed absorber/desorber technology and high energy requirements during solvent regeneration are the primary obstacles for its large-scale implementation. Different process intensification (PI) technologies to desorb CO 2 from the solvent have been introduced to mitigate the energy consumption compared to the conventional packed bed technology. This work reviews different technologies for intensification of CO 2 desorption. In this context, rotating packed beds, microreactors, and membrane contactors have been explored as potential alternatives to intensify the desorption because of their superior mass and heat transfer. Alternative energy sources like ultrasound and microwaves have also been used to improve the desorption performance of conventional equipments. PI can also be realized by using novel solvents with improved desorption kinetics in combination with intensification equipment. Thus in this review, a comprehensive assessment of different existing PI technologies based on regeneration energies and regeneration efficiencies relative to conventional technology is presented. The intensification of mass transfer for the different technologies is compared, and a new parameter, named the regeneration factor, is proposed to evaluate the performance of PI equipment. This study outlines the advances in process intensification of CO 2 desorption technologies to date and presents an overview of the merits and limits of all technologies.

show abstract

“…18 Although the application of MEA gets more popular nowadays, Yeh et al 19 found that, compared to the standard MEA solution, ammonia−water has higher loading capacity, lower reaction heat, and lower vaporization heat and can reduce regeneration energy by 62%, so ammonia decarbonization is still a widely used method. Pachitsas et al 20 added K 2 CO 3 to the ammonia reaction system to reduce the regeneration energy consumption of the rich solution, but the lean solution with high CO 2 loading for NH 3 escape seems to be ineffective; it also leads to the increased NH 3 escape in flue gas with low CO 2 content. Besides, the additives have been proposed to mix in the regeneration solution to reduce the energy consumption and ammonia escape during the regeneration process.…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Oxides on Ammonia Escape and Carbon Dioxide Desorption during Ammonia Decarbonization Regeneration

Yang

Chu

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The high energy consumption during the regeneration process is an important issue that currently limits the application of ammonia decarbonization technology. In this work, four solid metal oxides are proposed to be added in ammonia-rich solutions during regeneration for reducing energy consumption. The effects of the metal oxide type, heat duty, and CO2 loading on CO2 regeneration and NH3 escape are investigated. The results show that WO3 enhances the desorption of CO2 regeneration while inhibiting the escape of NH3 compared to other oxides. The CO2 regeneration rate increased by 68.9%, and the ammonia escape reduced by 36.3% with the addition of 4 wt % WO3 at 90 °C. Based on the CO2 loading rate and the product characterization, a possible mechanism for the metal oxide assisted ammonia regeneration process is analyzed, where WO3 can be used as an additive during the regeneration process of ammonia decarbonization to reduce the activation energy of the regeneration reaction and enhance CO2 desorption while suppressing NH3 escape.

show abstract

Parametric investigation of CO2 capture from industrial flue gases using aqueous mixtures of ammonia (NH3) and potassium carbonate (K2CO3)

Cited by 8 publications

References 30 publications

Biochar Synergistic New Ammonia Capture of CO₂ and High-Value Utilization of Intermediate Products

Biochar Synergistic New Ammonia Capture of CO₂ and High-Value Utilization of Intermediate Products

Process Intensification of CO₂ Desorption

Effects of Metal Oxides on Ammonia Escape and Carbon Dioxide Desorption during Ammonia Decarbonization Regeneration

Contact Info

Product

Resources

About

Parametric investigation of CO2 capture from industrial flue gases using aqueous mixtures of ammonia (NH3) and potassium carbonate (K2CO3)

Cited by 8 publications

References 30 publications

Biochar Synergistic New Ammonia Capture of CO2 and High-Value Utilization of Intermediate Products

Biochar Synergistic New Ammonia Capture of CO2 and High-Value Utilization of Intermediate Products

Process Intensification of CO2 Desorption

Effects of Metal Oxides on Ammonia Escape and Carbon Dioxide Desorption during Ammonia Decarbonization Regeneration

Contact Info

Product

Resources

About

Biochar Synergistic New Ammonia Capture of CO₂ and High-Value Utilization of Intermediate Products

Biochar Synergistic New Ammonia Capture of CO₂ and High-Value Utilization of Intermediate Products

Process Intensification of CO₂ Desorption