Char particle fragmentation and its effect on unburned carbon during pulverized coal combustion. Quarterly report, October 1, 1993--December 31, 1993
The information reported is for the period October I to December 31, 1993. During this quarter, activities were undertaken in Task 2. Oxygen concentrations were measured in the post-flame region of the entrained flow reactor. The sampling probe was used for the hot gas tests to sample the gas stream. Samples were injected into a gas chromatograph to determine the oxygen concentration. Results agreed with thermoequilibrium calculations that yield equilibrium compositions based on the stoichiometry of the feed gases. The axial temperature distribution along the reactor centerline was measured using a silica-coated platinum-rhodium thermocouple. Two coating techniques were tested and it was found that flame-plating silica to the thermocouple wires produced a thinner coating than a ceramic adhesive technique and therefore a smaller radiation correction. Other activities this quarter included the fabrication of a solids sampling probe support assembly and thermocouple support assembly. The reactor mass flow controllers and probe rotameters were calibrated. A control system for the stepper motor was built and tested.
- Research Organization:
- Stanford Univ., CA (United States). High Temperature Gasdynamics Lab.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-92PC92528
- OSTI ID:
- 10141201
- Report Number(s):
- DOE/PC/92528-5; ON: DE94009720; BR: AA1525050
- Resource Relation:
- Other Information: PBD: Feb 1994
- Country of Publication:
- United States
- Language:
- English
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