Author
V. Midhun Reddy
Bio: V. Midhun Reddy is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Fouling & Coal. The author has an hindex of 2, co-authored 2 publications receiving 24 citations.
Papers
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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.
26 citations
TL;DR: 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.
5 citations
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TL;DR: In this paper, the effect of parameters such as the hydrothermal temperature, the residence time and the particle size (PS) of the sawdust on the dechlorination efficiency (DE), the inorganics removal efficiency (RE), and the HHV of hydrochar was studied.
93 citations
TL;DR: The results show that the HTC is a promising alternative for conventional technologies for treatment and energy conversion of OEFW and shows high removal rates of sodium and potassium.
74 citations
TL;DR: Benefiting from advantage of the ultrasonication effects, ultrasound-assisted caustic leaching on spent cathode carbon had 55.6% shorter residue time than the traditional process with a higher impurity removal rate.
64 citations
TL;DR: The application of ultrasound in bio-leaching, termed sonobioleaching is a technique which has been reported to increase the rate and extent of metal extraction as discussed by the authors, however, one of the principal shortcomings is the slow rate of leaching which needs to be addressed.
Abstract: Chemical and biological leaching is practiced on a commercial scale for the mining of metals from ores. Although bioleaching is an environmentally-friendly alternative to chemical leaching, one of the principal shortcomings is the slow rate of leaching which needs to be addressed. The application of ultrasound in bioleaching, termed sonobioleaching, is a technique which has been reported to increase the rate and extent of metal extraction. This article reviews efforts made in the field of sonobioleaching. Since bioleaching is effectively a biological and chemical process, the effects of sonication on chemical leaching/reactions and biological processes are also reviewed. Although sonication increases metal extraction by increasing the metabolite production and enhanced mixing at a micro scale, research is limited in terms of the microorganisms explored. This paper highlights some shortcomings and limitations of existing techniques, and proposes directions for future research.
46 citations
TL;DR: A critical review of the ultrasound mechanism in enhancing coal demineralization, desulphurization, grindability, slurryability and dewatering is reviewed, which can significantly increase the clean coal yield under the substantial effect of cavitation and streaming.
45 citations