Stability and Carbon Capture Enhancement by Coal-Fly-Ash-Doped Sorbents at a High Temperature

Sreenivasulu, B.; Sreedhar, I.; Reddy, Benjaram M.; Raghavan, K. V.

doi:10.1021/acs.energyfuels.6b02721

Cited by 34 publications

(41 citation statements)

References 72 publications

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“…The exit gas composition was measured by an online gas analyzer with data logging facility. The CC data as a function of time was recorded to plot the required breakthrough curves [15]. The CC achieved was estimated using the Eq.…”

Section: Experimental Set-up and Procedures For Carbon Capture Studiesmentioning

confidence: 99%

Carbon capture using amine modified porous carbons derived from starch (Starbons®)

2019

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Adsorption based carbon capture to address the serious concern of global warming has been gaining worldwide attention of researchers due to its inherent advantages vis a vis other technical options like absorption, membrane and cryogenic separations, chemical looping combustion etc. Porous carbons from biomass wastes are under focus currently owing to its abundance, simple synthesis and regeneration and flexibility to achieve the desired pore structure and chemical modification. Carbon capture studies using porous carbons from starch have received little attention when compared to other biomass precursors. Hence in this work, facile synthesis of porous carbons from corn and potato starch has been employed. These were then screened w.r.t physico-chemical properties using different analytical tools like XRD, FTIR and BET surface area. Amine loading was done by wet impregnation method at different levels from 10 to 30% by wt to enhance their CC performance. Process standardization was done to maximize the CC capacity w.r.t critical process parameters like carbonation time, temperature, loading level, biomass precursor etc. A reasonably good CC of 3.4 mmol/g has been achieved at the optimal conditions. Cyclic stability and regenerability studies were also conducted to assess their stability and long term deployment potential. Amine loading was found to have a positive influence in achieving higher CC but at the cost of cyclic stability. From our studies, we could state that Starbons ® have a great potential to act as green sorbent in CC and the technology is in nascent stage, there is a huge window for innovation in synthesis, structure and chemical modification.

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Section: Experimental Set-up and Procedures For Carbon Capture Studiesmentioning

confidence: 99%

Carbon capture using amine modified porous carbons derived from starch (Starbons®)

2019

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“…This indirect heating mode brings about additional thermal resistance and heat loss during the calcination process. Another drawback of CaCO 3 is that it is easy to get sintered at the operating temperature 30–33 . The Tammann temperature of CaCO 3 is ~533°C while the operating temperature ranges from 650 to 850°C, as a result, the CaCO 3 granules are severely agglomerated and the chemical reactivity of the sintered body dramatically declines.…”

Section: Introductionmentioning

confidence: 99%

Blackened calcium‐based composite particles and their apparent kinetics features for solar thermochemical energy storage

et al. 2021

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The calcium looping (CaL) thermochemical thermal energy storage is one of the best high-temperature heat storage schemes for 3th concentrating solar power (CSP) photothermal power. However, the application of this technology is greatly hindered by the low solar absorption capability and the poor cyclic stability of CaCO 3 /CaObased material. In this article, the solar absorbing capability of CaCO 3 particles is enhanced by doping Mn-Fe oxides, meanwhile, awns of setaria faberis (ASF) and microcrystalline cellulose (MCC) are used as bio-templates to generate pores inside the particles. The pore-making process promotes the cyclic stability and carbonation kinetic features of the composite particles simultaneously. The test results show that the proposed particles possess adequate anti-crushing strength, high cyclic stability, high solar absorption, and high carbonation rate. In addition, the apparent carbonation kinetic features of the composite porous particles are studied with the influencing factors such as CO 2 partial pressure, reaction temperature, and particle morphology taken into consideration. A kinetic equation involving these parameters is developed with the thermogravimetry data of the prepared samples. By employing this kinetic function, the carbonation reaction of the prepared particles inside the carbonator becomes predictable, which is of great significance for the design and regulation of the carbonator achieving highly stable thermal output from the CaL thermochemical heat storage system.

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“…In inorganic CCU, the energy consumption is much lower than organic CCU due to the lower temperature and pressure during the processes. It can also use many materials such as amine [11], ammonia [12][13][14][15], alkaline materials [16], solid wastes [17][18][19][20][21][22], fly ash [23][24][25][26], cement [27], wastewater [28,29], and brine to capture CO 2 [30][31][32]. In the inorganic CCU method, magnesium and calcium are the chief elements for capturing CO 2 due to their high reaction with CO 2 and their obtainability.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Alkaline Earth Metals from Desalination Brine for Carbon Capture and Sodium Removal

Lee

Chen

2021

Water

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Because carbon dioxide adsorbs the radiation from the Sun and the Earth’s surface, global warming has become a severe problem in this century. Global warming causes many environmental problems such as heatwave, desertification, and erratic rainfall. Above all, erratic rainfall makes people have insufficient freshwater. To solve this problem, desalination technology has been developed in many countries. Although desalination technology can provide freshwater, it produces brine as well (producing 1 L of freshwater would result in 1 L of brine). The brine will decrease the dissolved oxygen in the sea and affect the organism’s habitat. In this study, magnesium and calcium from desalination brine were recovered in the form of magnesium hydroxide and calcium hydroxide by adjusting the pH value for carbon capture and sodium removal. Magnesium hydroxide would turn into magnesium carbonate through contacting CO2 in saturated amine carriers. Calcium hydroxide was added to the brine and reacted with CO2 (modified Solvay process). Sodium in brine would then be precipitated in the form of sodium bicarbonate. After removing sodium, brine can be released back into the ocean, or other valuable metals can be extracted from brine without the side effect of sodium. The results revealed that 288 K of 3-Amino-1-propanol could capture 15 L (26.9 g) of CO2 and that 25 g/L of Ca(OH)2 at 288 K was the optimal parameter to remove 7000 ppm sodium and adsorb 16 L (28.7 g) of CO2 in the modified Solvay process. In a nutshell, this research aims to simultaneously treat the issue of CO2 emission and desalination brine by combining the amines carrier method and the modified Solvay process.

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Stability and Carbon Capture Enhancement by Coal-Fly-Ash-Doped Sorbents at a High Temperature

Cited by 34 publications

References 72 publications

Carbon capture using amine modified porous carbons derived from starch (Starbons®)

Carbon capture using amine modified porous carbons derived from starch (Starbons®)

Blackened calcium‐based composite particles and their apparent kinetics features for solar thermochemical energy storage

Recovery of Alkaline Earth Metals from Desalination Brine for Carbon Capture and Sodium Removal

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