JANAF Thermochemical Tables, 1982 Supplement

Abstract

The thermodynamic tabulations previously published in four collections are extended by 227 new and revised tables. The JANAF Thermochemical Tables cover the thermodynamic properties over a wide temperature range with single phase tables for the crystal, liquid, and ideal gas state. In addition some multiphase tables are given. The properties given are heat capacity, entropy, Gibbs energy function, enthalpy, enthalpy of formation, Gibbs energy of formation, and the logarithm of the equilibrium constant for formation of each compound from the elements in their standard reference states. Each tabulation lists all pertinent input data and contains a critical evaluation of the literature upon which these values are based. Literature references are given.

Characterizing toxic emissions from a coal-fired power plant demonstrating the AFGD ICCT Project and a plant utilizing a dry scrubber/baghouse system: Bailly Station Units 7 and 8 and AFGD ICCT Project. Final report. Final report

“…One example is barium. The occurrence of this element at a concentration of 2.44 pg/Nm 3 (as reported in Table 6-34) is problematical; such a concentration, although low, corresponds to a concentration of barium vapor of 4.27 x 10' 10 atm, whereas the JANAF Tables (10) indicate that at 150 °C (the approximate duct temperature) the vapor pressure of this metal is just 3.09 x 10" 17 atm. The possibility of erroneous high indications of vapor concentrations does not detract from the observations about boron, mercury, and selenium, because high vapor concentrations of these metals are consistent with their thermodynamic properties.…”

“…High particulate concentration gas streams require low flow rate impactors in order to provide reasonably long sampling times with a minimum of several minutes being needed. However, the gas velocities in the duct, 24 m/s, would [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] have resulted in sub-millimeter nozzle tip sizes being required for isokinetic sampling with low flow rate impactors. Obtaining accurate and/or representative samples with such small tip sizes is problematical.…”

“…A practical target was 0.5 g of particulate matter digested and dissolved in 100 mL of solution. With solution detection limits for individual metals ranging from 0.0002 to 0.02 pig/mL, the concentrations of the metals in the total solid thus ranged from 0.04 to 10 fxg/g or, at the total particulate concentrations cited above, the following concentrations on the basis of flue-gas volume: 0.2 to 50 jzg/Nm 3 at the ESP inlet, 0.0004 to 0.7 ^g/Nm 3 at the ESP outlets, or 0.002 to 0.5 /zg/Nm 3 at the stack [2][3][4][5][6][7][8][9][10][11][12][13] A general assessment of how the quality of the results in this program was influenced by the detection limits of the methods and procedures adopted is as follows:…”

“…The efficiencies of removal of metals across the two ESPs and the scrubber are listed in [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. The value for the Unit 7 ESP is based on an assumed equality of metal concentrations at the inlet of two ESPs each sampling day.…”

“…The test periods are taken as stable operating periods, and a single flow rate for each [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] process stream, representing the pseudo-steady-state conditions, is calculated for each day of inorganic element testing. The data supplied by the plant system were averaged for the test period.…”