Journal ArticleDOI
Suitability of laser-induced breakdown spectroscopy in screening potential additives to mitigate fouling deposits
Soundaravalli Balakrishnan,V. Midhun Reddy,A. Mehta,Nilesh J. Vasa,Rajarathinavelu Nagarajan +4 more
Reads0
Chats0
TLDR
In this article, laser-induced breakdown spectroscopy (LIBS) technique is proposed and demonstrated to screen potential additives to trap alkali elements in ash, which can suppress the growth rate of fouling deposits, and increase thermal efficiency of a coal-fired thermal power plant.Abstract:
Alkali vapors present in the flue gas generated during coal-based combustion form fouling deposits as they condense. An additive added to coal can trap alkali elements in ash, therefore suppress the growth rate of fouling deposits, and increase thermal efficiency of a coal-fired thermal power plant. Laser-induced breakdown spectroscopy (LIBS) technique is proposed and demonstrated to screen potential additives to trap alkali elements in ash. Five additives—namely, kaolinite, alumina, silica, magnesia, and pumice—were analyzed for their effectiveness on four Indian coals for retaining/confining alkali elements in ash during coal combustion. Ratio analysis based on LIBS emission intensity values clearly shows that kaolinite and pumice are promising additives to trap sodium. Similarly, kaolinite, pumice, and silica exhibited good potassium retention.read more
Citations
More filters
Journal ArticleDOI
Theoretical investigation of sodium capture mechanism on kaolinite surfaces
TL;DR: In this paper, the adsorption and capture mechanisms of different sodium species vapor (Na, NaCl and NaOH) on kaolinite surface were investigated by density functional theory (DFT) calculation.
Journal ArticleDOI
Effect of ambiance on the coal characterization using laser-induced breakdown spectroscopy (LIBS)
TL;DR: In this article, the influence of surrounding gases, such as He, N2, atmospheric air, and Ar, and gas flow rate on the laser-induced breakdown spectroscopy (LIBS) characterization of coals in free space is studied.
Journal ArticleDOI
An Ultra-Thin, Bandwidth Enhanced Metamaterial Absorber for X-Band Applications
S. Ramya,I. Srinivasa Rao +1 more
TL;DR: A simple metamaterial absorber with ultra-thin structure has been proposed for X-band applications with enhanced absorption bandwidth and is polarization sensitive because of its asymmetrical design, and has diverse impacts on absorption at various incidence angles.
Journal ArticleDOI
Laser-Induced Breakdown Spectroscopy Combined with Temporal Plasma Analysis of C2 Molecular Emission for Carbon Analysis in Coal.
TL;DR: In this article, a benchtop laser-induced breakdown spectroscopy is demonstrated to determine the elemental carbon content present in raw coal used for combustion in power plants, and the spectral intensities of molecular CN and C2 emission are measured together with the atomic carbon (C) and other inorganic elements (Si, Fe, Mg, Al, Ca, Na, and K) in the spectrum of coal.
Book ChapterDOI
Determination of Ash Content in Coal Using Laser-Induced Breakdown Spectroscopy with Multivariate Analysis
TL;DR: In this article, the average emission intensity of the inorganic elements increases with the ash content of the coal sample with R2 = 0.82 and resolution = 3.7% corresponding to the reference ash data.
References
More filters
Book
Gas Cleaning at High Temperatures
Roland Clift,Jonathan Seville +1 more
TL;DR: In this article, the performance of the EPRI hot gas filter at Grimethorpe PFBC establishment has been investigated under high temperature for PFBC unit, and a low-density ceramic filter has been used for gas cleaning at high temperatures.
Journal ArticleDOI
Reducing fly ash deposition by pretreatment of brown coal: Effect of aluminium on ash character
TL;DR: In this paper, the effect of pretreatment on the structure and the related fouling/slagging behavior of fly ash from brown coal has been investigated and it was shown that less of such components were formed after treatment of Loy Yang brown coal with water and particularly, with Al compounds.
Journal ArticleDOI
Ultrasonic coal washing to leach alkali elements from coals.
TL;DR: Ulasonic water-washing and chemical-washing, in comparison with agitation, are studied in order to estimate the intensification of the alkali removal process by sonication.
Journal ArticleDOI
An investigation into the effectiveness of fireside fuel additives
TL;DR: A combination of laboratory prescreening tests and longer trials on a 2MW industrial chaingrate stoker have been used to investigate the effectiveness of fuel additives at alleviating alkali bonded fouling as mentioned in this paper.