CuFeAl Nanocomposite Catalysts for Coal Combustion in Fluidized Bed

Fedorov, A. P.; Yazykov, N. A.; Булавченко, О. А.; Saraev, Аndrey А.; Kaichev, Vasily V.; Yakovlev, V. А.

doi:10.3390/nano10051002

Cited by 11 publications

(5 citation statements)

References 43 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A spherical shape; monodispersity, with regard to particle distribution; and also a nanometric size are preferred. In addition, the catalytic stability of the catalyst is important [10]. The aspect that needs to be optimized is the appropriate amount of added catalyst.…”

Section: New Combustion Catalystsmentioning

confidence: 99%

“…Fedorov et al [10] present a method of obtaining an innovative CuFeAl nanocomposite catalyst, which can be successfully used in the combustion processes of, e.g., lignite. It was shown that the developed spherical CuFeAl nanocomposite catalyst exhibits high CO oxidation activity, is characterized by satisfactory mechanical properties, and has a high stability temperature (up to 800 • C).…”

Section: New Combustion Catalystsmentioning

confidence: 99%

See 1 more Smart Citation

Pulverized Coal-Fired Boilers: Future Directions of Scientific Research

et al. 2023

View full text Add to dashboard Cite

The paper provides an outlook on future directions of research and the possible applications for pulverized coal-fired boilers. One potential direction for future research is to focus on the ways to improve the efficiency of pulverized coal-fired boilers. This could involve developing new combustion technologies that are able to more thoroughly burn the coal and produce less waste or finding ways to capture and use the excess heat that is generated during the combustion process. The pulverized coal combustion process in power boilers is still being improved by the preliminary cleaning of coal and the use of various catalytic additives. Another area of research that could be valuable is the development of advanced control systems and monitoring technologies for pulverized coal-fired boilers. These systems could be used to optimize the performance of the boiler and ensure that it is operating at maximum efficiency while also providing real-time data on the condition of the boiler and any potential problems that may arise. The analysis of literature shows that several future paths of development and scientific research related to the technology of pulverized coal combustion in boilers can be distinguished.

show abstract

Section: New Combustion Catalystsmentioning

confidence: 99%

Section: New Combustion Catalystsmentioning

confidence: 99%

Pulverized Coal-Fired Boilers: Future Directions of Scientific Research

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Its key strength lies in efficient solid dispersion that ensures effective utilization of the solids’ surface area and significantly enhances the surface-based rate processes. In the fluidized bed mode of contact, lower pressure drop, greater interfacial contact, efficient gas–solid mixing, and higher heat and mass transfer rates provide a substantial advantage over fixed bed or packed bed processes [ 1 , 2 , 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Inlet Flow Strategies on the Dynamics of Pulsed Fluidized Bed of Nanopowder

et al. 2023

View full text Add to dashboard Cite

The use of fluidization assistance can greatly enhance the fluidization hydrodynamics of powders that exhibit poor fluidization behavior. Compared to other assistance techniques, pulsed flow assistance is a promising technique for improving conventional fluidization because of its energy efficiency and ease of process implementation. However, the inlet flow configuration of pulsed flow can significantly affect the bed hydrodynamics. In this study, the conventional single drainage (SD) flow strategy was modified to purge the primary flow during the non-flow period of the pulse to eliminate pressure buildup in the inlet flow line while providing a second drainage path to the residual gas. The bed dynamics for both cases, namely, single drainage (SD) and modified double drainage (MDD), were carefully monitored by recording the overall and local pressure drop transients in different bed regions at two widely different pulsation frequencies of 0.05 and 0.25 Hz. The MDD strategy led to substantially faster bed dynamics and greater frictional pressure drop in lower bed regions with significantly mitigated segregation behavior. The spectral analysis of the local and global pressure transient data in the frequency domain revealed a pronounced difference between the two flow strategies. The application of the MDD inlet flow strategy eliminated the disturbances from the pulsed fluidized bed irrespective of the pulsation frequency.

show abstract

“…Fluidized beds are often preferred over packed beds due to their superior gas-solid contact, higher mass and heat transfer rates, and efficient gas-solid handling and mixing [1][2][3][4][5][6]. However, the fluidization of ultrafine and fine powders belonging to Geldart group C is difficult due to strong inter-particle forces (IPFs), which lead to severe bed non-homogeneities and poor interphase phase mixing [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Voidage on the Collapsing Bed Dynamics of Fine Particles: A Detailed Region-Wise Study

et al. 2022

View full text Add to dashboard Cite

Bed collapse experiments provide vital information about fluidized bed hydrodynamics. In this study, the region-wise bed collapse dynamics of glass beads, titania (TiO2), and hydrophilic nanosilica (SiO2) particles with widely different voidages (ε) of 0.38, 0.80, and 0.98, respectively, were carefully investigated. These particles belonged to different Geldart groups and exhibited varied hysteresis phenomena and fluidization indices. The local collapse dynamics in the lower, lower-middle, upper-middle, and upper regions were carefully monitored in addition to the distributor pressure drop to obtain greater insight into the deaeration behavior of the bed. While the collapse dynamics of glass beads revealed high bed homogeneity, the upper middle region controlled the collapse process in the case of titania due to the size-based segregation along the bed height. The segregation behavior was very strong for nanosilica, with the slow settling fine agglomerates in the upper bed regions controlling its collapse dynamics. The collapse time of the upper region was 25 times slower than that of the lower region containing mainly large agglomerates. The spectral analysis confirmed the trend that was observed in the pressure transients. The clear presence of high frequency events at 20 and 40 Hz was observed in the nanosilica due to agglomerate movements. The residual air exiting the plenum was strongly affected by the bed voidage, being lowest for the nanosilica and highest for the glass beads.

show abstract

CuFeAl Nanocomposite Catalysts for Coal Combustion in Fluidized Bed

Cited by 11 publications

References 43 publications

Pulverized Coal-Fired Boilers: Future Directions of Scientific Research

Pulverized Coal-Fired Boilers: Future Directions of Scientific Research

Effect of Inlet Flow Strategies on the Dynamics of Pulsed Fluidized Bed of Nanopowder

Effect of Voidage on the Collapsing Bed Dynamics of Fine Particles: A Detailed Region-Wise Study

Contact Info

Product

Resources

About