Ultimate analysis of coal

Total moisture of coal Ultimate analysis of coal Ultimate analysis of coke Chlorine in coal and coke Phosphorus in coal and coke Arsenic in coal and coke Analysis of coal ash and coke ash Determination of moisture-holding capacity of hard coal General introduction and methods for reporting results Determination of total moisture of coke Proximate analysis, determination of moisture content of the general analysis test sample... 

Ultimate analysis of coal and coke, determination of nitrogen content... 

Ultimate analysis of coal and coke, determination of total sulfur content, Eschka method Ultimate analysis of coal and coke, determination of total sulfur content, high temperature combustion method... 

The proximate analysis of coal is presented as a group of test methods (ASTM D-3172 ASTM D-3173 ASTM D-3174 ASTM D-3175 ASTM D-5142 ISO 1171) that has been used widely as the basis for coal characterization in connection with coal utilization. These analyses are in contrast to the ultimate analysis of coal, which provides information about the elemental composition. 

ASTM D-3176. Standard Practice for Ultimate Analysis of Coal and Coke. 

The ultimate analysis of coal involves determination of the weight percent carbon as well as sulfur, nitrogen, and oxygen (usually estimated by difference). Trace elements that occur in coal are often included as a part of the ultimate analysis. 

The standard method for the ultimate analysis of coal and coke (ASTM D-3176) includes the determination of elemental carbon, hydrogen, sulfur, and nitrogen, together with the ash in the material as a whole. Oxygen is usually calculated by difference. The test methods recommended for elemental analysis include the determination of carbon and hydrogen (ASTM D-3178), nitrogen (ASTM D-3179), and sulfur (ASTM D-3177 ISO 334 ISO 351), with associated determination of moisture (ASTM D-3173) and ash (ASTM D-3174) to convert the data to a moisture-ash-free basis. 

Infrared absorption is one of three standard test methods for sulfur in the analysis sample of coal and coke using high-temperature tube furnace combustion methods (ASTM D-4239). Determination of sulfur is, by definition, part of the ultimate analysis of coal (Chapter 4), but sulfur analysis by the infrared method is also used to serve a number of interests evaluation of coal preparation, evaluation of potential sulfur emissions from coal combustion or conversion processes, and evaluation of the coal quality in relation to contract specifications, as well as other scientific purposes. Infrared analysis provides a reliable, rapid method for determining the concentration of sulfur in coal and is especially applicable when results must be obtained rapidly for the successful completion of industrial, beneficiation, trade, or other evaluations. 

Table IV Ultimate Analysis of Coal Liquids and the fractions separated by liquid sulfur dioxide...

Table I. Weight Distribution and Ultimate Analysis of Coal-Liquid Fractions"...

For example, all of the carbon in coal is determined by ultimate analysis and it is not an indication (or determination) of the carbon-forming propensity (i.e., the coke-producing ability) of the coal as is the case with the test for the volatile matter content of coal. Thus, just as there has been the need to develop standard methods for the proximate analysis of coal, there has also been the necessity to develop standard methods for the ultimate analysis of coal. 

ASTM. 201 Ip. Practice for Ultimate Analysis of Coal and Coke (ASTM D3176). Annual Book of ASTM Standards, Section 05.05. American Society for Testing and Materials, West Conshohocken, PA. 

It is difficult to insert various sensors to measure temperature, pressure, flow rate of gas from ground surface into reacting spots. Chemical phenomenon occurred in UCG has not been well understood compared with surface gasification processes because of the lack of information described above. Therefore, the reaction formula, heat of gasification, and adiabatic temperature of UCG should be helpful to understand the reaction process. We applied our method to the data of gas composition and ultimate analysis of coal obtained by UCG tests carried out at five China mines, and investigated the feature of each chemical processes. 

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