Ultra-repeatability measurement of calorific value of coal by NIRS-XRF

Abstract

Calorific value is an important indicator to evaluate the comprehensive quality of coal, and its real-time and rapid analysis is of great significance for optimizing the coal blending process and...

Combustion properties and pollutant analysis of coal-blended bio-heavy oil fuel

“…Moreover, the higher the proportion of bio-heavy oil blending, the closer the caloric value of the fuel is to that of petroleum. 19,31…”

“…29,30 This accounts for the favorable fuel properties of bio-heavy oil, which has been reported to possess a high calorific value for combustion, even exceeding that of coal. 31 Therefore, the use of bio-heavy oil as fuel blended with coal not only helps reduce the CO 2 , SO x , and NO x emissions generated during the combustion process but also increases the combustion calorific value of the fuel, reduces the ash content, and improves the combustion characteristics of the fuel. 32,33…”

“…29,30 This accounts for the favorable fuel properties of bio-heavy oil, which has been reported to possess a high caloric value for combustion, even exceeding that of coal. 31 Therefore, the use of bio-heavy oil as fuel blended with coal not only helps reduce the CO 2 , SO x , and NO x emissions generated during the combustion process but also increases the combustion caloric value of the fuel, reduces the ash content, and improves the combustion characteristics of the fuel. 32,33 This study employs a technology involving the blending of coal with bio-heavy oil to increase the combustion caloric value of the fuel, improve the fuel miscibility characteristics, and reduce the emission of gaseous pollutants.…”

NIRS-XRF fusion spectroscopy for coal calorific value prediction using data deficient learning

“…However, this approach is associated with radioactive hazards, necessitating signicant nancial investments in equipment procurement and ongoing maintenance, thereby rendering it a costly endeavor. Recently, the spectral sensors laser-induced breakdown spectroscopy (LIBS), 2,3,[8][9][10][11][12][13][14][15][16][17] near-infrared spectroscopy (NIRS), 16,[18][19][20][21] and X-ray uorescence spectroscopy (XRF) [21][22][23][24] are utilized for evaluating coal properties. LIBS leverages a high-energy laser beam to ablate coal samples that generate plasma exhibiting a unique radiation spectrum.…”

Determination of ash content, volatile matter, and calorific value in coal by OLS combined with laser-induced breakdown spectroscopy based on PC recombination

“…However, it can detect only elements with an atomic number higher than 11 because of instrument limitations and low yields of light element X-rays. 15 Dual-energy γ-ray transmission technology is the frequently used online coal ash measurement technique; however, the large size, nuclear radiation threats, and high running expenses limit its use. 16 Microwave technology measures coal moisture online primarily and has a limited scope of application, and the accumulation mode and thickness of powdered coal easily affect its measurement.…”