Compilation of Sandia coal char combustion data and kinetic analyses

Char particle fragmentation and its effect on unburned carbon during pulverized coal combustion. Quarterly report, April 1--June 30, 1995

“…The data support a value of p near 0.25. The corresponding value for a is 0.25, a value consistent with those previously determined (Mitchell et al, 1991 andSmith, 1971). …”

“…The set of 100 differential equations were solved using LSODE (Radhakrishnan and Hindmarsh, 1983), an ordinary differential equation solver. Ambient conditions were specified (Tg, = 1500 K, Pg = 0.12 am), and char combustion model parameters were taken from the literature (Mitchell et aL, 1991 andMitchell, 1992). The apparent activation energy was taken as 26 kcal/mol, consistent with results of previous work (Hurt and Mitchell, 1992) for chars containing 90% carbon.…”

Char particle fragmentation and its effect on unburned carbon during pulverized coal combustion. Quarterly report, October 1--December 31, 1994

“…Based on previous work (Mitchell, et al, 1992), this method is accurate to better than 10%. The measurements indicate that 25% of the initial char mass remained (Le., m/mo = 0.25) at the 117 ms residence time in the flow reactor.…”

Ash Deposit Formation and Deposit Properties. A Comprehensive Summary of Research Conducted at Sandia's Combustion Research Facility

“…Figure 58 and compared to the results from Eqs. (70) Figure 59. Equation (73) shows qualitative agreement at best with Eqs.…”