The Experts below are selected from a list of 3 Experts worldwide ranked by ideXlab platform
R.s. Higgins - One of the best experts on this subject based on the ideXlab platform.
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BROWN COAL SAMPLING, ANALYSIS AND COMPOSITION
The Science of Victorian Brown Coal, 1991Co-Authors: Dj. Brockway, R.s. HigginsAbstract:Publisher Summary This chapter provides an overview of the sampling, analysis, and composition of Victorian brown coal. The high moisture content and the nature of the inorganic ash forming constituents in Victorian brown coals present special challenges in their sampling, sample preparation, and analysis. These brown coals are characterized by a high moisture content, low ash yield, and high oxygen content. The average moisture contents range from 52% to 67%; the ash yield is generally less than 6% and less than 3% for the majority of the large coal fields; the oxygen content of the organic coal substance can be as high as 27%. The ash forming constituents in Victorian brown coals are mainly present either as cations associated with the carboxyl groups in the coal or as dissolved salts in the associated moisture, unlike black coals where the ash is derived from mineral species. The development of methods for the chemical analysis of Victorian brown coal is still progressing. The most elusive goal is the direct analysis of organic oxygen in coal and although a number of methods have been researched, none have proved satisfactory for routine analysis purposes. Methods for mineral and Nonmineral Inorganics analysis of whole coal by means other than X-ray fluorescence spectroscopy and acid extraction/atomic absorption spectroscopy (AAS) are also under active development. Extensive work over the last half century has defined and characterized all major and most minor brown coal fields in Victoria.
Dj. Brockway - One of the best experts on this subject based on the ideXlab platform.
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BROWN COAL SAMPLING, ANALYSIS AND COMPOSITION
The Science of Victorian Brown Coal, 1991Co-Authors: Dj. Brockway, R.s. HigginsAbstract:Publisher Summary This chapter provides an overview of the sampling, analysis, and composition of Victorian brown coal. The high moisture content and the nature of the inorganic ash forming constituents in Victorian brown coals present special challenges in their sampling, sample preparation, and analysis. These brown coals are characterized by a high moisture content, low ash yield, and high oxygen content. The average moisture contents range from 52% to 67%; the ash yield is generally less than 6% and less than 3% for the majority of the large coal fields; the oxygen content of the organic coal substance can be as high as 27%. The ash forming constituents in Victorian brown coals are mainly present either as cations associated with the carboxyl groups in the coal or as dissolved salts in the associated moisture, unlike black coals where the ash is derived from mineral species. The development of methods for the chemical analysis of Victorian brown coal is still progressing. The most elusive goal is the direct analysis of organic oxygen in coal and although a number of methods have been researched, none have proved satisfactory for routine analysis purposes. Methods for mineral and Nonmineral Inorganics analysis of whole coal by means other than X-ray fluorescence spectroscopy and acid extraction/atomic absorption spectroscopy (AAS) are also under active development. Extensive work over the last half century has defined and characterized all major and most minor brown coal fields in Victoria.
