!----------------------------------------------------------------------------
!	CHAMBER DEPENDENT REACTIONS, WITHOUT ADJUSTABLE RADICAL SOURCE
!
!	Version 11/96a
!
!	Last Updated by WPC  11/18/96
!
!	Similar to standard SAPRC-90 version except that option to
!	represent both radical source and NOx offgasing as HONO offgasing
!	is added.
!
!	Default:  No wall effects
!
!	Files Required:
!
!		NOXAIR.RXN
!
!	Coefficients and Rate Constants Used to Define Chamber Effects:
!
!		RS-I	   ...  (Coefficient.)  Intersept of the "radical
!				source" regression of OH input rate vs NO2.
!				Ratio of Radical input rate to NO2 photolysis
!				rate when NO2 not present.  Default = 0.
!
!		RS-I1, RS-I2, RS-I3 ... Values of RS-I at 290, 300, 310
!
!		RN-I	   ...  (Coefficient.)  Ratio of HONO input rate
!				to NO2 photolysis rate.
!
!		RN-I1, RN-I2, RN-I3 ... Values of RN-I at 290, 300, 310
!
!		RS-S	   ...	(Coefficent.)  Slope of the "radical source"
!				regression of the ratio of OH input rate to
!				the NO2 photolysis rate vs NO2.  Default = 0.
!
!		HONO-F	   ...  Ratio of initial HONO to initial NO2.  Default
!				= 0.
!
!		E-NO2/K1   ...	Ratio of NO2 offgasing rate to the NO2
!				photolysis rate.  Default = 0.
!
!		E-ALD/K1   ...	Ratio of HCHO offgasing rate to the NO2
!				photolysis rate.  Default = 0.
!
!		EHONO/K1   ...  Ratio of HONO offgasing rate to the NO2
!				photolysis rate.  Default = 0.
!
!		HCHO-W	   ...	HCHO on wall, offgased (active specie).
!				(option disabled)
!
!		O3W	   ...	Ozone wall loss rate constant.
!
!		HPW	   ...	H2O2 wall loss rate constant.
!
!		N25I	   ...	Intercept of regression of N2O5 wall loss
!				rate.  Unimolecular loss of N2O5 to the 
!				walls in the absense of H2O.
!
!		N25S	   ...	Slope of regression of N2O5 wall loss
!				rate.  Bimolecular rate constant for
!				N2O5 + H2O -> loss of N2O5 to wall.
!
!		NAW	   ...	Unimolecular rate constant for HNO3 going
!				to the walls.  Doesn't affect any of the
!				chemistry except the HNO3 concentration.
!
!		NO2W	   ...	Unimolecular rate constant for NO2
!				wall hydrolysis and loss.
!
!		YHONO      ...	Yield of HONO in the unimolecular reaction
!				(or hydrolysis) of NO2 on the walls.  Default
!				= 0.
!
!		XSHC	   ...	"Excess" hydrocarbon reactivity (units of
!				min-1).  [HC] x k(OH+HC) for "contaminant"
!				organics.  Unimolecular rate constant
!				converting HO to HO2.
!
!	Buildup Species Used for Accounting Purposes:
!
!		NOX-WALL   ...	NOx absorbed on walls.  Used in part to keep
!				track of N-balance.  Can be negative if wall
!				off-gasing occurs at a greater rate than NOx
!				going to wall.
!
!		XC	   ...  "Lost Carbon".  Used for the purpose of
!				keeping track of carbon balance.  In this case,
!				it is reduced to make up the carbon formed if
!				HCHO offgasing occurs.
!
!	Dark Reactions.
!
.RXN
O3W)	0.0		;O3 =
HPW)	0.0		;HO2H = 
N25I)	0.0		;N2O5 = #2 NOX-WALL
N25S) 	0.0		;N2O5 + H2O = #2 NOX-WALL
NAW) 	0.0		;HNO3 = NOX-WALL
NO2W) 	0.0		;NO2 = #YHONO HONO + #1-YHONO NOX-WALL
NONO2W)	0.0		;NO + NO2 + H2O = #2 HONO
.COE
YHONO	0.0
!
!	This code defines NOX-WALL as the sink for Nitrogen which does not
!	appear as HONO when NO2 goes to the walls.
!
.INS INIT
'1-YHONO' = 1.0-'YHONO'
!
!	Light Reactions
.COE
RS-I	0.0
RS-S	0.0
RS-I1	0.0
RS-I2	0.0
RS-I3	0.0
RS-I4	0.0
!
RN-I	0.0
RN-I1	0.0
RN-I2	0.0
RN-I3	0.0
RN-I4	0.0
.VTEMP 4
	290.0, 300.0, 310.0, 320.0
.VTCO
T290	1.0	0.0	0.0	0.0
T300	0.0	1.0	0.0	0.0
T310	0.0	0.0	1.0	0.0
T320	0.0	0.0	0.0	1.0
.RXN
!
RSS)	PF=NO2		;NO2 + HV + #RS-S = #.5 HONO + #.5 NOX-WALL
!
RS)	0.0		;HV + #NO2 = HO.
RSI)	PF=NO2		;HV + #RS-I = HO.
RSI1)	PF=NO2		;HV + #T290 + #RS-I1 = HO.
RSI2)	PF=NO2		;HV + #T300 + #RS-I2 = HO.
RSI3)	PF=NO2		;HV + #T310 + #RS-I3 = HO.
RSI4)	PF=NO2		;HV + #T320 + #RS-I4 = HO.
!
RN)	0.0		;HV + #NO2 = HONO + #-1 NOX-WALL
RNI)	PF=NO2		;HV + #RN-I = HONO + #-1 NOX-WALL
RNI1)	PF=NO2		;HV + #T290 + #RN-I1 = HONO + #-1 NOX-WALL
RNI2)	PF=NO2		;HV + #T300 + #RN-I2 = HONO + #-1 NOX-WALL
RNI3)	PF=NO2		;HV + #T310 + #RN-I3 = HONO + #-1 NOX-WALL
RNI4)	PF=NO2		;HV + #T320 + #RN-I4 = HONO + #-1 NOX-WALL
!
!	Wall Off-Gasing
.COE
E-NO2/K1 0.0
E1NO2/K1 0.0
E2NO2/K1 0.0
E3NO2/K1 0.0
E4NO2/K1 0.0
!
E-ALD/K1 0.0
EHONO/K1 0.0
.RXN
ONO2)	PF=NO2		;HV + #E-NO2/K1 = NO2 + #-1 NOX-WALL
1NO2)	PF=NO2		;HV + #T290 + #E1NO2/K1 = NO2 + #-1 NOX-WALL
2NO2)	PF=NO2		;HV + #T300 + #E2NO2/K1 = NO2 + #-1 NOX-WALL
3NO2)	PF=NO2		;HV + #T310 + #E3NO2/K1 = NO2 + #-1 NOX-WALL
4NO2)	PF=NO2		;HV + #T320 + #E4NO2/K1 = NO2 + #-1 NOX-WALL
!
OALD)	PF=NO2		;HV + #E-ALD/K1 = HCHO + #-1 XC
OHON)	PF=NO2		;HV + #EHONO/K1 = HONO + #-1 NOX-WALL
!
!	Define initial HONO as fraction of initial NO2, or as absolute HONO
.COE
HONO-F	0.0
HONO-I	0.0
!
!	This code multiplies the initial concentration of NO2 by HONO-F
!	and adds it to the initial concentration of HONO.  Subtracted
!	from initial NO2 (HONO interference on NOx analyzer).
!
.INS INIT
"C HONO" = "C HONO" + 'HONO-I' + ("C NO2"*'HONO-F')
"C NO2" = "C NO2" - ('HONO-I' + ("C NO2"*'HONO-F'))
!
!	Background HC contaminants.
!
.RXN
XSHC)	0.0		;HO. = HO2.
!
!	Radical Wall Loss
!
OHW)	0.0		;HO. =
HO2W)	0.0		;HO2. =
CO2W)	0.0		;C-O2. =
ROW2)	0.0		;RO2-R. =
!
!	END OF FILE
.