Energy and exergy analyses for the carbon capture with the Chilled Ammonia Process (CAP)

Valenti, Gianluca; Bonalumi, Davide; Macchi, Ennio

doi:10.1016/j.egypro.2009.01.140

Cited by 74 publications

(39 citation statements)

References 17 publications

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“…Past results indicate that the parametric conditions could have a significant impact on the emissions and that operational techniques will be required to eliminate any fugitive ammonia releases. In the Chilled Ammonia Process [13][14][15], the flue gas is reduced in temperature and this greatly decreases the ammonia emissions within the regenerable process. In ammonia scrubbing processes at or slightly above ambient temperature [7,11], techniques need to be developed to address the ammonia emissions issue.…”

Section: Discussion and Implications With Respect To Process Designmentioning

confidence: 99%

Study of an ammonia-based wet scrubbing process in a continuous flow system

Resnik

Pennline

2013

Fuel

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A continuous gas and liquid flow, regenerative scrubbing process for CO 2 capture was demonstrated at the bench-scale level. An aqueous ammonia-based solution captures CO 2 from simulated flue gas in an absorber and releases a nearly pure stream of CO 2 in the regenerator. After the regeneration, the solution of ammonium compounds is recycled to the absorber. The design of a continuous flow unit was based on earlier exploratory results from a semi-batch reactor, where a CO 2 and N 2 simulated flue gas mixture flowed through a well-mixed batch of ammonia-based solution. During the semi-batch tests, the solution was cycled between absorption and regeneration steps to measure the carrying capacity of the solution at various initial ammonia concentrations and temperatures. Consequentially, a series of tests were conducted on the continuous unit to observe the effect of various parameters on CO 2 removal efficiency and regenerator effectiveness within the flow system. The parameters that were studied included absorber temperature, regenerator temperature, initial NH 3 concentration, simulated flue gas flow rate, liquid solvent inventory in the flow system, and height of the packed-bed absorber. From this testing and subsequent testing, ammonia losses from both the absorption and regeneration steps were quantified, and attempts were made to maintain steady state during operations. Implications of experimental results with respect to process design are discussed.

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Section: Discussion and Implications With Respect To Process Designmentioning

confidence: 99%

Study of an ammonia-based wet scrubbing process in a continuous flow system

Resnik

Pennline

2013

Fuel

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“…Although the process is similar in structure to amine-based processes, in the ammonia-based process, aqueous ammonia reacts with CO2 in the flue gas in an absorption tower at atmospheric pressure and low temperatures (either at room temperature [12] or at chilled temperatures of 0-20 °C [13,14]) to form ammonium bicarbonate salts. The flue gas is exhausted after a washing step, and the ammonia bicarbonate slurry leaving the bottom of the absorber is sent to a regenerator at higher temperatures (100 °C) and pressures (20-40 bar) [14] in which the CO2 is desorbed and released as a high pressure gas. The CO2 is washed with water to separate the residual ammonia contained in the gases, and then the CO2 is cooled and Figure 2.…”

Section: Figurementioning

confidence: 99%

Comparison of CO2 Capture Approaches for Fossil-Based Power Generation: Review and Meta-Study

et al. 2017

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This work is a meta-study of CO 2 capture processes for coal and natural gas power generation, including technologies such as post-combustion solvent-based carbon capture, the integrated gasification combined cycle process, oxyfuel combustion, membrane-based carbon capture processes, and solid oxide fuel cells. A literature survey of recent techno-economic studies was conducted, compiling relevant data on costs, efficiencies, and other performance metrics. The data were then converted in a consistent fashion to a common standard (such as a consistent net power output, country of construction, currency, base year of operation, and captured CO 2 pressure) such that a meaningful and direct comparison of technologies can be made. The processes were compared against a standard status quo power plant without carbon capture to compute metrics such as cost of CO 2 emissions avoided to identify the most promising designs and technologies to use for CO 2 emissions abatement.

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“…Carbon dioxide (CO 2 ) is considered to be themain contributing factor to global warming and climate change,CO 2 capture technologies have started getting attention [1],2].Aqueous ammonia-based CO 2 capture technology has many technical and economical advantages over amine-based capture technology, such as high CO 2 absorption capacity, low regeneration energy, no sorbent degradation, cheap chemical cost,and simultaneous capture of multiple pollutants [3]-10]. However ammonia absorbent has a limitation in practical application because of its high vapor pressure, which causes highloss of ammonia in regeneration process [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Metal Ion on Ammonium Bicarbonate Solution Decomposed into Carbon Dioxide

Hu¹,

Li²,

Jin³

et al. 2017

Proceedings of the 2nd 2016 International Conference on Sustainable Development (ICSD 2016)

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Abstract-Ammonia-based carbon capture process is one of the promising technologiesfor CO2 mitigation. However, it has a problem to be solved for practical implementation due to the high volatilityof ammonia, which incurs ammonia lose during regeneration. Effects of Fe 3+ or Co 2+ on ammonia escape and CO2desorption in NH4HCO3 solution decomposition processwere investigated. The results showed that, the addition of metal ion noticeably decreased ammonia escape and slightly increased desorption proportion due to the complexation of metal ion and free ammonia.The metal ion added also promoted desorption rate in this process. Moreover, metal ion Fe 3+ is more effective than Co 2+ on CO2desorption and ammonia escape in the regeneration process.

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Energy and exergy analyses for the carbon capture with the Chilled Ammonia Process (CAP)

Cited by 74 publications

References 17 publications

Study of an ammonia-based wet scrubbing process in a continuous flow system

Study of an ammonia-based wet scrubbing process in a continuous flow system

Comparison of CO2 Capture Approaches for Fossil-Based Power Generation: Review and Meta-Study

Effect of Metal Ion on Ammonium Bicarbonate Solution Decomposed into Carbon Dioxide

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