! **** WALL == UNC Chamber Dependent Reactions, last changed February 1, 1999
! This formulation of the wall mech was produced through discussion with HEJ in
! an attempt to seperate the dependence of the mechs performance on the HC/NOx ratio.
! An initial wall HNO3 (WHNO3) concentration must accompany this mech, which is related
! to the amount of venting that occurred prior to each experiment.
!
UNITS:
 AFactor=ppm_min;

!** BACKGROUND VOCs and ENTRAINMENT REACTIONS
COEFF=
 DL=1;
REACTIONS=
  ENTRAIN]          = 0.50*CO + 0.07*O3 + 0.58*H2 +
                      1.79*CH4+ 0.002*HCHO+ 0.045*BVOC #DL*Dilution, 
  BCKGND]  OH +BVOC = 

                                          #4444.4 ;

!  **WALL REACTIONS**
! This is the section that was changed on 3/30/99.

COEFF=
 WALLOH  =1.0E-3,
 WALLNO2 =8.0E-4;

REACTIONS=

!*********************NO2/HONO Wall Formation********************

  WallNO2a]             NO2 = HONO                   #HVNO2*WALLOH,
  WallNO2b]     NO2 + WHNO3 = 1*HONO + 1*NO2     #5.0E-3, 
  WallNO2c]           WHNO3 = NO2                    #HVNO2*WALLNO2, 
  WallNO2d]      NO + WHNO3 = 1*HONO + 1*NO2     #9.0E-2,

!*********************Wall Nitric Acid Formation******************

 WHNO3a]     NO2 + WH2O = WHNO3                    #1.0E-8,
 WHNO3b]      NO + WH2O = WHNO3                    #1E-8,
 WHNO3c]           N2O5 = 2.0*WHNO3                #2.5E-3, {Tuazon 83 "dry" Rate}
 WHNO3d]    N2O5 + WH2O = 2.0*WHNO3                #1E-7@2000;
 

!*********************Wall deposition reactions ******************

COEFF=
  kWallH2O2=4.0E-2, {measured loss rate}
  kWallHNO3=9.0E-3; {estimated loss rate}
REACTIONS=
  WallH2O2]        H2O2 =                             #kWallH2O2, 
  WallO3]          O3   =                             #1.4E-4, {meas loss rate}
  WallHNO3]        HNO3 = WHNO3                       #kWallHNO3; 
                                                      
! end of UNC Chamber Dependent Reactions
#def UNCWALL
!