Combustion Chars

	Frame ID: C01 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Tenuisphere High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical tenuisphere. It is characterized by its spheroidal shape, open center, and thin walls. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C02 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Anisotropic Tenuisphere High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical anisotropic tenuisphere. It is characterized by its spheroidal shape, open center, thin walls and optical anisotropy. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C03 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Crassisphere High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical crassisphere. It is characterized by its spheroidal shape, open center, and thick walls. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C04 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Anisotropic Crassisphere High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical anisotropic crassisphere. It is characterized by its spheroidal shape, open center, thick walls and optical anisotropy. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C05 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Tenuinetwork High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical tenuinetwork. It is characterized by its spheroidal shape, honeycomb center, and thin walls. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C06 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Anisotropic Tenuinetwork High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical anisotropic tenuisphere. It is characterized by its spheroidal shape, honeycomb center, thin walls and optical anisotropy. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C07 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Mesosphere High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical mesosphere. It is characterized by its spheroidal shape, honeycomb center, and thick walls. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C08 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Anisotropic Mesosphere High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical anisotropic mesosphere. It is characterized by its spheroidal shape, honeycomb center, thin walls and optical anisotropy. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C09 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Inertoid Char High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical inertoid. It is characterized by its irregular shape and small amount of pore space. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C10 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Anisotropic Inertoid Char High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical anisotropic inertoid. It is characterized by its irregular shape and small amount of pore space. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C11 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Solid Char High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical solid char. It is characterized by its irregular shape and lack of porosity. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C12 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Fusinoid Char High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical fusinoid char. It is characterized by its irregular shape and cell texture derived from original plant structure. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C13 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Mixed Porous Char High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical mixed porous char. It is characterized by its irregular shape, composite nature and pore volume of greater than 50%. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C14 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Mixed Dense Char High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical mixed dense char. It is characterized by its irregular shape, composite nature and pore volume of less than 50%. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C15 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Skeletal Char High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical skeletal char. It is characterized by its unfused but burnt out nature and high porosity. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C16 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Mineraloid Char High Resolution Image (300 dpi)
Description: The object in the center of the field is a typical mineraloid char. It is characterized by its irregular shape, mineral composition (pyrite in this case), and very high reflectance. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C17 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Char Rank Series High Resolution Image (300 dpi)
Description: This isotropic char is from a high volatile bituminous coal with a reflectance of 0.59% (mean max in oil). This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C18 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Char Rank Series High Resolution Image (300 dpi)
Description: This isotropic char is from a high volatile bituminous coal with a reflectance of 0.67% (mean max in oil). This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C19 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Char Rank Series High Resolution Image (300 dpi)
Description: This anisotropic char is from a high volatile bituminous coal with a reflectance of 0.81% (mean max in oil). Note the fine-grained mosaic texture. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C20 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Char Rank Series High Resolution Image (300 dpi)
Description: This anisotropic char is from a high volatile bituminous coal with a reflectance of 0.85% (mean max in oil). Note the fine-grained mosaic texture. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C21 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Char Rank Series High Resolution Image (300 dpi)
Description: This anisotropic char is from a high volatile bituminous coal with a reflectance of 0.87% (mean max in oil). Note the fine-grained mosaic texture. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C22 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Char Rank Series High Resolution Image (300 dpi)
Description: This anisotropic char is from a medium volatile bituminous coal with a reflectance of 1.14% (mean max in oil). Note the medium-grained mosaic texture. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C23 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Char Rank Series High Resolution Image (300 dpi)
Description: This anisotropic char is from a medium volatile bituminous coal with a reflectance of 1.27% (mean max in oil). Note the medium-grained mosaic texture. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C24 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: None Important Features: Char Rank Series High Resolution Image (300 dpi)
Description: This anisotropic char is from a low volatile bituminous coal with a reflectance of 1.42% (mean max in oil). Note the medium-grained mosaic texture. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C25 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Maceral Char Series High Resolution Image (300 dpi)
Description: This frame shows a typical maceral distribution in the high volatile bituminous Herrin No. 6 coal.

	Frame ID: C26 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Maceral Char Series High Resolution Image (300 dpi)
Description: This frame shows a typical char type distribution in the high volatile bituminous Herrin No. 6 coal. This sample is the same one as that in C25. The char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C27 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Maceral Char Series High Resolution Image (300 dpi)
Description: This frame shows a vitrinite maceral concentrate obtained from the high volatile bituminous Herrin No. 6 coal with density gradient centrifugation.

Frame ID: C28 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Maceral Char Series High Resolution Image (300 dpi)

Description: This frame shows the char formed from a vitrinite maceral concentrate obtained from the high volatile bituminous Herrin No. 6 coal with density gradient centrifugation. Note the abundance of cenospheres. This sample is the same one as that in C27. The char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C29 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Maceral Char Series High Resolution Image (300 dpi)
Description: This frame shows a semifusinite maceral concentrate obtained from the high volatile bituminous Herrin No. 6 coal with density gradient centrifugation.

Frame ID: C30 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Maceral Char Series High Resolution Image (300 dpi)

Description: This frame shows the char formed from a semifusinite maceral concentrate obtained from the high volatile bituminous Herrin No. 6 coal with density gradient centrifugation. Note the abundance of cenospheres and tenuinetworks. This sample is the same one as that in C29. The char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C31 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Maceral Char Series High Resolution Image (300 dpi)
Description: This frame shows a fusinite maceral concentration obtained from the high volatile bituminous Herrin No. 6 coal with density gradient centrifugation.

Frame ID: C32 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Maceral Char Series High Resolution Image (300 dpi)

Description: This frame shows the char formed from a fusinite maceral concentrate obtained from the high volatile bituminous Herrin No. 6 coal with density gradint centrifugation. Note the abundance of fusinoid and unfused char. This sample is the same one as that in C31. The char was produced in an entrained flow reactor in nitrogen with a heating rate of 10^4-10^5° C per second with a residence time of approximately one second at a maximum temperature of 1000° C.

	Frame ID: C33 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Oxidized Char High Resolution Image (300 dpi)
Description: This frame shows a char particle with a white rim due to oxidation or burning of the char.

	Frame ID: C34 Sample ID: Coal Combustion Char Magnification: As given Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: None Important Features: Char Containing Mineral Matter High Resolution Image (300 dpi)
Description: This frame shows a char particle containing several particles of pyrite