Rich flammability limits in CH{sub 3}OH/CO/diluent mixtures
- Sandia National Labs., Livermore, CA (United States)
- Dow Chemical Co., Midland, MI (United States)
This research, a joint project between Sandia National Laboratories/California and Dow Chemical Company/Midland, is intended to examine existing flame modeling capability developed at Sandia to model experimental data for rich flammability limits. System studied is methanol/carbon monoxide/diluent mixtures, where the diluent is either nitrogen or carbon dioxide at pressures of 1, 11, and 21 atm, respectively. Critical oxygen concentration needed to sustain a flame was measured in a spherical vessel with a central ignition source for several mixtures and pressures. Burning velocities of 1-D, planar, freely propagating premixed flames were calculated to determine minimum oxygen concentration required for these flames to propagate. This minimum O{sub 2} concentration was found to be consistently larger than that observed in experiments; however, effects of pressure and diluent composition agreed well with experimental data. Attempts were made to model the spherical vessel experiment directly, which resultd in qualitative agreement with experimental data and steady flame predictions. In addition, the rich flammability limit was calculate for pure methanol-air flames to be at an equivalence ratio of {approximately} 2.1, and extincton occurs at K{sub ex} =1670 sec{sup {minus}1} for the opposed-flow, strained, stoichiometric methanol-air case.
- Research Organization:
- Sandia National Labs., Livermore, CA (United States); Dow Chemical Co., Midland, MI (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10108526
- Report Number(s):
- SAND--94-8484C; WSS/CI--94-015; CONF-940711--2; CONF-940397--1; ON: DE94004341; BR: GB0103012
- Country of Publication:
- United States
- Language:
- English
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