Carbon dioxide removal from air-A state of the art review (original) (raw)
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SOLUTION TO AIR POLLUTION FOR REMOVING CO2 AND SO2 FROM FLUE GASES: A PROSPECTIVE APPROACH
International Conference on Mechanical Engineering and Renewable Energy 2019 (ICMERE2019) 11 – 13 December, 2019, Chittagong, Bangladesh, 2019
Among all environmental pollutions air pollution is severe which causes health and environmental problems. Air pollution on the other hand caused from different fossil-fueled vehicles and industries. This paper presents a system which reduces air pollution by capturing CO2 and SO2 and store CO2 and SO2. This proposed system reduces the CO2 and SO2 emissions from air of different fossil-fueled vehicles, power plants and industries and as a consequences reduce global warming and agricultural losses. This paper also represents membrane separation process with their corresponding advantages and disadvantages which is most significant for CO2 separation. Moreover, wet flue gas desulfurization is one of the most efficient methods among all the processes for SO2 separation and the separated CO2 and SO2 is used for different purposes in industry. However, due to rapid industrialization in recent years, this proposed system is significant to reduce global warming and health diseases by reducing CO2 and SO2 from fossil-fueled vehicles, power plants and industry.
New Technique of CO2 Removal from Industrial Area
International Journal of Advanced Research, 2023
The main source of CO2 is the burning of fossil fuels like coal and oil. When this happens, carbon dioxide gets released into the atmosphere.CO2 is a colorless, odorless gas. It is essential for life on Earth and is produced naturally by plants in the process of photosynthesis. The burning of fossil fuels releases CO2 into the atmosphere. CO2 is not very soluble in water, so it does not dissolve easily in seawater, making it difficult to detect at sea.There are many benefits for society as a whole from removing CO2 from the atmosphere, but there are also many problems associated with doing so. In this article I will examine these problems and look at several methods that could be used to remove carbon dioxide from the atmosphere. The most promising method for removing carbon dioxide from the atmosphere is probably direct air capture. This involves using a chemical process to extract CO2 directly from the air and store it in a liquid or solid form. The most promising method for remov...
Assessment of different methods of CO2 capture in post-combustion using ammonia as solvent
Journal of Cleaner Production, 2014
Aqueous ammonia is well known to be a substitute of MEA solvent for absorbing CO 2 in post-combustion process. However, aqueous ammonia is highly volatile it can become gaseous and leaves the absorption column with the treated gas. Several processes that use ammonia solution as solvent deal with this problem. The use of membrane contactor could limit ammonia loss and could widen the operative ranges of temperature, pressure and ammonia concentration. This paper aims at evaluating and comparing different methods to capture CO 2 by ammoniac. The evaluation of all process has demonstrated a high CO 2 removal efficiency.
Stripping of Ammonia from Aqueous Solutions in the Presence of Carbon Dioxide
Chemical Engineering Research and Design, 2005
T he stripping of ammonia from aqueous solutions in the presence of carbon dioxide in the low concentration region is studied experimentally and theoretically. The phase equilibria method of is selected by comparison of different methods with newer experimental data. The differential two adjacent films model enabling component fluxes calculations is used in a stripper model. In the experimental part the systems NH 3 -water -air and CO 2 -water -air are used in order to select the best physical mass transfer coefficients correlations. The system NH 3 -CO 2 -water-air modified with strong acids or bases is used for experimental verification of the process model in a wide range of process variables. Model predictions in conditions of negative enhancement of mass transfer are presented. The influence of this effect on ammonia stripping efficiency in the presence of carbon dioxide is analysed.
Chilled Ammonia Process Evaluation for Co 2 Separation
2019
In this study, the chilled ammonia technology was analyzed for diminishing CO2. Thus, the temperature in the absorption stage of the chilled ammonia method was varied, observing its influences on the CO2 capture performance and on the thermal heat consumption for solvent regeneration. The number stages of the absorption column are another factor that has an impact on the CO2 capture method performance. Also, the ratio between the flue gases amount and aqueous ammonia amount was varied for determining the optimal ratio of the technical point of view. It is observed that the optimal solvent temperature was 10 C for which a minimum energy consumption was obtained.
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/use-of-aqueous-ammonia-in-silencer-for-removal-of-co2-so2-and-nox-from-exhaust-gases-of-i.c.-engines https://www.ijert.org/research/use-of-aqueous-ammonia-in-silencer-for-removal-of-co2-so2-and-nox-from-exhaust-gases-of-i.c.-engines-IJERTV2IS90156.pdf This paper consists of experimental research work for implementing aqueous ammonia solution as an absorber for the reduction of CO2, SO2 and NOx from exhaust gases of I.C. Engines. The aqueous ammonia process can simultaneously remove CO2, SO2, NOx and also hydrocarbons that may present in the exhaust gas. There could be oxidation of SO2 and NOx prior to contacting the aqueous ammonia absorbent. A concept pertaining to the ammonia/carbon dioxide reaction in an exhaust system is presented.
Hemijska industrija
In this work a review of the currently available methods for carbon dioxide removal from flue gasses is given. Some of them are commercially available, while others are still under development. Special attention is given to detailed description of the methods based on hemi sorption by aqueous solutions of alkanol amines, which found wide commercial use in industry. Selection of appropriate absorbent, process equipment, methods, working parameters, combustion process etc. are some of key points that will be reviewed within this work in order to present advantages and limitations of carbon dioxide removal methods. In the experimental section density, viscosity and refractive index of insufficiently investigated carbon dioxide removal agents, such as monoisopropanolamine (MIPA), diisopropanolamine (DIPA), triisopropanolamine (TIPA) and currently widely used dietanolamine (DEA) are provided. The data obtained are crucial for the equipment design and process optimization.
International Journal of Research Amines' effect on CO 2 removal efficiency
International Journal of Research, 2019
Efficient CO2 mitigation techniques will become increasingly demanding due to environmental issues. There are many sources which release CO2 and combustion of fossil fuel plays the major role. Coal fired power plants are the most prominent CO2 emitting source today. The main purpose of this study is to understand the solvent's effect on CO2 removal efficiency for power plant flue gas treating. Four different types of solvents are taken into consideration. MEA, Diethanolamine (DEA), Diglycolamine (DGA) and Methyldiethanolamine (MDEA) are applied as solvent for capturing processes. A coal fired flue gas removal process is implemented in to Aspen Plus. The solvent strength and lean loading are considered as most relevant factors for analyzing. With the variation of these factors, efficiency of CO2 removal from power plant flue gas is examined for different solvents. The four different solvents have unique optimum conditions such as; concentration, lean loading and solvent temperature, for highest removal efficiency. The suitable concentrations for MEA, DEA and MDEA are normally around 20-30wt%, however, DGA can be used as higher concentration solvent for CO2 removal. MDEA has low heat of regeneration and maximum loading capacity as well as less corrosive effect than MEA.
Process analysis of improved process modifications for ammonia-based post-combustion CO2 capture
Journal of Environmental Chemical Engineering, 2021
Carbon-based fuels contribute majorly towards global energy demand; however, it results in global warming. The increasing energy demand and climate change highlights the need to develop cost-effective carbon sequestration schemes. Amine-based CO2 scrubbing have been widely used for their high selectivity and production of pure CO2. However, a challenge in implementing amine-based technology is high energy consumption with a low capture ratio. The energy penalty can be reduced either by introducing new solvents, optimizing parameters, or through process modifications. Recently, ammonia has tempted attraction in place of amines. In this present work, a Radfrac model in Aspen Plus is developed involving heat integration and absorption enhancement to overcome the barriers. The heat integration is performed with a rich solvent split and absorption enhancement is done with split flow arrangement. Further, the model is evaluated at different split ratios by performing heat integration between different streams of the flowsheet. Moreover, the process configurations used in this system is compared with MEA based process modifications concerning energy reduction. A competitive reduction in regeneration duty was observed which was 36% less than the reference NH3 and 47% less than the MEA process. This evaluated modification will result in maximum efficiency, a maximum level of CO2 capture, and a reduction in the reboiler duty. The rich solvent split and split flow process reduced the reboiler duty by 15.8% and 32.8%, respectively. The split flow process also indicated an increase of 17.2% in rich loading to recover 90% CO2.
An effective and ecofriendly suggestion to decrease atmospheric carbon dioxide by using NH3 gas
Global Journal of Environmental Science and Management, 2018
Global warming is increasing permanently, because the concentration of CO2 in the atmosphere is rising continuously. According to National Oceanographic and Atmospheric Administration, the concentration of CO2 in the atmosphere was 407 ppm in June 2016 and 413 ppm in April 2017 as a last record for now. If the effects of other greenhouse gases, such as CH4, N2O, SF6, NF3, chlorofluorocarbons, hydrofluorocarbons, perfluorocarbons are added, the effective concentration may reach or exceed 550 ppm CO2-equivalent. According to the United Nations Intergovernmental Panel on Climate Change-2014 Climate Change Report, this is about two times higher than 278 ppm CO2 concentration in the pre-industrial year 1765. Thus, very urgent solutions must be found. The aim of this article is to suggest a vital, fast and very meticulous solution using NH3 gas in the atmosphere in order to decrease the atmospheric CO2 without delay. The laboratory experiments in the gas phase for (NH3+ CO2) reaction sho...