coal and higher heating value

Heat of combustion - Wikipedia

The heating value of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it. The calorific value is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard...

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Estimation of higher heating value of coal based on proximate ...

To estimate the higher heating value (HHV) of coals based on proximate analysis, a nonlinear model termed support vector regression (SVR) is introduced in this work. A total of 167 Chinese coal samples and 4540 U.S. coal samples were employed to develop and verify the SVR-based correlations. The estimation results...

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Standard Grade Coal - Heating Values - Engineering ToolBox

Coal Grade, Heating Value. (Btu/lb), (kJ/kg). Anthracite, 12910, 30080. Semi-Anthracite, 13770, 32084. Low-volatile bituminous, 14340, 33412. Medium-volatile bituminous, 13840, 32247. High-volatile bituminous A, 13090, 30499. High-volatile bituminous B, 12130, 28262. High-volatile bituminous C, 10750, 25047.

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Fuels - Higher and Lower Calorific Values - Engineering ToolBox

Higher and lower calorific values (=heating values) for some common fuels - coke, oil, wood, hydrogen and others.

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Lower and Higher Heating Values of Fuels | Hydrogen Tools

Coal characteristics assumed by GREET for hydrogen and Fischer-Tropsch diesel production. The HHV figure for liquid hydrogen in Btu/gal is based on personal communication with Ye Wu of Argonne National Laboratory. Sources: See Lower and Higher Heating Values of Hydrogen and Fuels. Desired Output: Heating...

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formulas for calculating the heating value of coal and coal - Argonne ...

In the above, Q is the gross heating value in Btu/lb on the dry basis and C , H,. S, (O), N, and A are the respective contents oi carbon, hydrogen, sulfur, oxygen, nitrogen, and ash in weight percent, also on the dry basis. For a fair test of the formulas on samples representing commercial coal we eliminated samples with more...

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Lower and Higher Heating Values of Coal: Why do they exist ...

Oct 27, 2015 ... Hello friends, The balanced chemical equation for the combustion of carbon is: C(solid) + O2(gas) -> CO2(gas) Now, the lower and higher heating value of hydrocarbon fuels (such as methane) exists because in the LOWER heating value, you are subtracting away the latent heat of vaporization of water.

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Lower and Higher Heating Values of Gas, Liquid ... - ResearchGate

[5] For solid fuels, the heating values in units of Btu/lb are converted from the heating values in units of Btu/ton. [6] Coal characteristics assumed by GREET for electric power production. [7] Coal characteristics assumed by GREET for hydrogen and Fischer-Tropsch diesel production. Notes: [1] The lower heating value (also...

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What is the significance of the heating value HHV and LHV for...

As can be seen from Table 1, the heating values of biomass derived biochars in the literature vary between 11.83 and 44.2 (MJ/kg), whereas the values for coal and charcoal vary between 14 and 35 (MJ/kg) (Speight, 2005). Generally, the high heating values of biochars make them attractivefeeds for clean energy...

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Evaluation of Data on Higher Heating Values and Elemental ...

where Q is the higher heating value, and C, H, S, and. ° are mass percents of the elements in the sample on a dry basis. Formula 1 has been used to evaluate coal. [ 2] and fossil fuels [ 1] and has been shown to give results with a probable error not exceeding 2 % [3]. Formulas such as Dulong's have been used to con.

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coal | netl.doe.gov - Department of Energy

Bituminous - Bituminous coal contains anywhere from 45 to 86 percent carbon, giving it an even higher heating value than sub-bituminous. High heat and pressure and between 100 and 300 million years are required to produce this type of coal. About half of the coal produced in the US falls in this category with West...

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The Determination of Heating Values of Fuels

This coal, by a calorimetric test, showed 14,843 B. t. u., and from a comparison the degree of accuracy of the formula will be noted. ... High and Low Heat Value of Fuels—In any fuel containing hydrogen the calorific value as found by the calorimeter is higher than that obtainable under most working conditions in boiler...

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heating value of non-recycled waste plastics - American Plastics ...

Mar 23, 2016 ... weighted-average, lower heating value of NRP is 35.7 MJ/kg. This is significant because it means that NRP has a higher energy value than several conventional fuel sources routinely used in the U.S. and globally. NRP has an energy value that is 19% higher than petroleum coke, 37% higher than U.S. coal...

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Characterization of Slovenian coal and estimation of coal heating ...

Coal quality is a function of three fundamental, independent factors: coal rank, organic composition, and inorganic components [1]. The commonly used coal quality parameter in Slovenia is calorific value. The calorific value of coal is expressed as the higher heating value [2], the heat produced by the combustion of a unit...

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Estimating the Calorific Values of Lignocellulosic Fuels - Ayhan ...

Ultimate analysis based mathematical models are the most reported with Dulong's equation being among the first available to calculate the calorific value of coal or biomass. The higher heating value (HHV) at constant pressure measures the enthalpy change of combustion with water condensed. The HHVs (MJ/kg) of the...

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GLOSSARY AND CONVENTIONS | Coal: Energy for the Future | The ...

Throughout this report all thermal efficiency figures are based on the higher heating value (HHV) of fuel, which is the convention most widely used in the United States for coal-based systems. HHV credits the fuel with the heat of vaporization of water formed in the combustion reaction; that is, water is assumed to exist in the...

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Higher Heating Value and Lower Heating Value Variation prepared by

Nov 11, 2009 ... The variability in results is shown in Table 1. For comparison the lower heating values calculated from default value (HHV) from B415 are also shown in Table 1. Table 1. Heating Values. 1. ASTM D 5865-07a: Standard Test Method for Gross Calorific Value of Coal and Coke. 2. ASTM E 711-87: Standard...

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Estimation of Fuel Higher Heating Value (HHV) Using Proximate ...

May 30, 2013 ... Estimation of Fuel Higher Heating. Value (HHV) Using Proximate Analysis. Presentation by: Dr. Saqib Nasir. Senior Scientific Officer,. Coal Technology Section,. Pakistan Council of Scientific & Industrial Research Laboratories,. Lahore – 54600, Pakistan. Webpage: http://pk.linkedin.com./pub/dr-nasir-saqib.

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Solved: Estimate the higher heating value (HHV) and lower heati ...

The heat value of a fuel is defined as the negative of the standard heat of combustion of the particular fuel. Both a lower (net) heating value (LHV) and a higher (gross) heating value (HHV) exist, depending upon the state of the water produced in the combustion of a fuel. Comment(0). Chapter 10.4, Problem 1THC is solved.

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Lower and Higher Heating Values (LHV and HHV)

There are two different types of heating value, which are the lower heating value (LHVLower heat value) and the higher heating value (HHVHigher heat value). By definition the higher heating value is equal to the lower heating value with the addition of the heat of vaporization of the water content in the fuel. These values...

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What is the exact difference between GCV & NCV? - Quora

Gross calorific value (GCV) is the amount of heat released by the complete combustion of a unit of natural gas. It is also known as Higher Heating Value (HCV). Net Calorific Value (NCV) also known as lower heating value (LHV) or lower calorific va...

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Lecture 3 Exercises of analysis and calorific value - nptel

The ultimate analysis of a coal(moist basis in %): C 69.8 , H 4.6 , N 1.4, O 8.5, S 2.5, H2O 4.5 and ash 8.7. The gross calorific value, moist basis, is 29920 KJ/Kg. Calculate, by means of the. Dulong formula, the gross calorific value, moist basis, of the coal. 3. The proximate analysis of coal is: Moisture 2.4%, Volatile Matter...

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Co-firing of Biomass with Coal - cleanenergyregulator.gov.au

Aug 15, 2000 ... It is normal to use the higher heating value (HHV) of the fuel in efficiency calculations. The boiler losses consist of: • Flue gas exit losses are due to the heat in the flue gas, which is discarded to the atmosphere. The temperature at which the gases are discarded is above the temperature of the combustion air...

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Improved prediction of higher heating value of ... - Boston University

Mar 9, 2017 ... sigmoid architecture to predict biomasses' higher heating values from only their proximate analyses, requiring minimal .... ture with coal. Thus, the ability to swiftly predict the HHV of a fuel. – or fuel mixture – could inform decisions about pre-processing of coal based on volatile and fixed matter targets.

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Proximate analyses and predicting HHV of chars obtained from ...

Oct 25, 2007 ... Higher heating value (HHV) and analysis of chars obtained from cocracking of petroleum vacuum residue (XVR) with coal (SC), biomass (BG, CL) and plastics (PP, PS, BL) are important which define the energy content and determine the clean and efficient use of these chars. The main aim of the present...

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Fuel Heating Values - Apogee Interactive

The table below lists the direct fuel heating values of various fuels and heat sources. Direct Fuel Heating Values. Fuel Sources, Higher Heating Value (HHV), Density ... Some fuels are stored or warehoused (such as fuel oil in a tank or coal in a bunker), while other fuels such as natural gas or electricity are point-of-use fuels.

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Fuels -2 Higher or Gross(HCV)(GCV) and Lower or Net Calorific ...

May 20, 2016 ... In this video lecture we will learn about higher calorific value and lower calorific value of coal and see it relation and formula. Follow :) Youtube: https:...

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Higher and lower heating values of selected lignocellulose materials

Due to the high energy potential (formed as a result of photosynthesis during the plants' lifetime) it constitutes an excellent energy source. As it is reported by Gostomczyk. [2011], lower heating value of coal is approx. 21.10 – 8.85 MJ/kg, while for liquid fuels it is approx. 47.31 – 42.3 MJ/kg and for gas fuels it is approx.

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CALCULATION OF HEATING VALUES FOR THE SIMULATION OF ...

interest is the heating value because the calculation of energy balances is based on this value in many simulation programs. Regarding organic substances (e.g. coal, biomass), the heating value in general is ..... Higher heating values calculated based on different correlations used in the software Aspen Plus. Based on the...

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FUELS & COMBUSTION CALCULATIONS

HEATING VALUE. ▫ ULTIMATE ANALYSIS. ▫ PROXIMATE ANALYSIS. ▫ ASH DEFORMATION POINTS. Initial deformation temp. Softening temp. ... Limestone required for unit mass of fuel. [R = Calcium to Sulfur molar ratio]. ▫ If appreciable amount of CaO is present in coal ash replace R with R'. R. X. S. Lq caco3. 32. 100.

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APPENDIX IV

Fuel 1/. Unit. Gross calorific value. Anthracite. MJ/kg. 31.4. Hard coal. MJ/kg. 29.3. Lignite. MJ/kg. 26.7. Coal briguettes. MJ/kg. 29.3. Coke. MJ/kg. 28.4. Heavy fuel oil. MJ/kg. 42.6. Middle fuel oil. MJ/kg. 43.1. Light fuel oil. MJ/kg. 43.5. Gas oil (diesel fuel). MJ/kg. 45.6. Kerosine. MJ/kg. 46.5. Butane. MJ/kg. 49.3. Propane.

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Coal Conversion Facts

WORLD COAL INSTITUTE info@worldcoal.org www.worldcoal.org. August 2007. Calorific Values (CV). Units: kcal/kg – kilocalories per kilogram. MJ/kg* – Megajoules per kilogram. Btu/lb – British thermal units per pound. * 1 MJ/kg = 1 Gigajoule/tonne (GJ/t). Gross & Net Calorific Values. Gross CV or 'higher heating value'...

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Ultimate and Proximate Correlations for Estimating the Higher ...

Jan 15, 2013 ... At relatively low temperatures, hydrothermal carbonization (HTC) produces a coal-like solid fuel (HTC-char), that reaches higher heating values (HHV) which are comparable to the HHV of hard-coal. Nevertheless, until now it has not been examined if the HHV of these HTC-chars could be estimated...

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Heating Value - Clarke Energy

Heating Value. January 25, 2013. The lower heating value (LHV) or higher heating value (HHV) of a gas is an important consideration when selecting a gas engine or CHP plant. Gas engines efficiency is typically quoted based upon the LHV of the gas. Whenever a hydrocarbon fuel is burned one product of combustion is...

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HEAtiNG VAlUE

Propane. Natural Gas Hydrogen. Coal (B). Coal (C). Fuel Type. Heating Value ( MJ/kg ). Lower Heating Value Higher Heating Value. • The greater the % hydrogen in the fuel, the greater the % discount in heating value if steam is not condensed from combustion exhaust. • For hydrogen, the discount approaches 15% of HHV.

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1 SI Appendix General information and Assumption Total oil ... - PNAS

Mar 8, 2007 ... LHV of Coal = 27.098 MJ/kg. LHV of Biomass = 17.549 MJ/kg. HHV of coal ... O2 requirement for coal gasifier is 1 kg O2/kg coal feed. O2 requirement for biomass gasifier is 0.8 kg O2/kg ..... incident energy that is harnessed as H2 in the form of its high heating value (HHV). For land area calculation, average...

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Heating Value of Fuels The Energy Advocate

wood, oil, gas. coal methane hydrogen Note!==> Units and equations are nice, but rather meaningless without any numbers to go into them. In this section, I give a few very approximate values for various sources of energy and for various uses. The Heat Content table shows the heat that is released when various fuels are...

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The Method and Procedure for Determining the Gross Calorific ...

Mar 6, 2015 ... Coal, as it is commonly known, is a solid fossil hydrocarbon fuel material. The gross calorific value of coal is frequently used when determining the total calorific value for a specific amount of coal for fuel value purposes or when establishing the rank of classification of the coal material. The sulfur value and...

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Heat of combustion - IDC Technologies

The heating value of a fuel may be categorized as either the higher heating value (HHV) or the lower heating value (LHV).[1][2] The. HHV is also known as the gross ... for fuel heating values. Both the HHV's and LHV's of fuels (especially coal and other solid fuels) can be be further sub-categorized and expressed as:[3].

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Fuels and Combustion - The University of Tulsa

anthracite, has a slightly lower carbon content, but also has a high heating value. Subbituminous coal, lignite, and peat have successively poorer heating values and higher volatile matter than bituminous. Coal is a highly inhomogeneous material, of widely varying composition, found in seams (layers) of varying thickness at...

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