Reduced Chemical Kinetic Model for Titan Entries

Table 3

	𝑘𝑓=𝐴𝑇^𝑛e^−𝑇𝑎/𝑇	𝐴, cc/mol/s	𝑛	𝑇𝑎, K	Source Uncert. est.
Dissociation reactions
(1)	N2 + M ⇆ N + N + M	7.00 × 10^21	−1.60	113,200	[14]/𝐹=3.0
	Enhanced rate for M = N, C, H	3.00 × 10^22	−1.60	113,200	[14]/𝐹=3.0–5.0
	Enhanced rate for M = e^−	3.00 × 10^24	−1.60	113,200	[14]/𝐹=3.0
(2)	CH4 + M ⇆ CH3 + H + M	4.70 × 10^47	−8.20	59,200	[7]/𝐹=2.0
(3)	CH3 + M ⇆ CH2 + H + M	1.02 × 10^16	0.00	45,600	[7]/𝐹=1.26–3.2
(4)	CH3 + M ⇆ CH + H2 + M	5.00 × 10^15	0.00	42,800	[15]/𝐹=1.26–2.0
(5)	CH2 + M ⇆ CH + H + M	4.00 × 10^15	0.00	41,800	[15]/𝐹=1.26–2.0
(6)	CH2 + M ⇆ C + H2 + M	1.30 × 10^14	0.00	29,700	[15]/𝐹=1.26–2.0
(7)	CH + M ⇆ C + H + M	1.90 × 10^14	0.00	33,700	[15]/𝐹=1.26–2.0
(8)	C2 + M ⇆ C + C + M	1.50 × 10^16	0.00	71,600	[16]/𝐹=1.26–2.0
(9)	H2 + M ⇆ H + H + M	2.23 × 10^14	0.00	48,350	[7, 17]/𝐹=1.26–2.0
(10)	CN + M ⇆ C + N + M	2.53 × 10^14	0.00	71,000	[18, 19]/𝐹=1.5–2.0
(11)	NH + M ⇆ N + H + M	1.80 × 10^14	0.00	37,600	[20]/𝐹=1.26–2.0
(12)	HCN + M ⇆ CN + H + M	3.57 × 10^26	−2.60	62,845	[21]/𝐹=1.5–2.0
Radical reactions
(13)	CH3 + N ⇆ HCN + H + H	7.00 × 10^13	0.00	0	[22]/𝐹=10.0
(14)	CH3 + H ⇆ CH2 + H2	6.03 × 10^13	0.00	7,600	[17]/𝐹=10.0
(15)	CH2 + N2⇆ HCN + NH	4.82 × 10^12	0.00	18,000	[20]/𝐹=10.0
(16)	CH2 + N ⇆ HCN + H	5.00 × 10^13	0.00	0	[22]/𝐹=10.0
(17)	CH2 + H ⇆ CH + H2	6.03 × 10^12	0.00	−900	[20]/𝐹=5.0–10.0
(18)	CH + N2⇆ HCN + N	4.40 × 10^12	0.00	11,060	[22]/𝐹=1.5–3.2
(19)	CH + C ⇆ C2 + H	2.00 × 10^14	0.00	0	[15]/𝐹=10.0
(20)	C2 + N2⇆ CN + CN	1.50 × 10^13	0.00	21,000	[23]/𝐹=1.26–2.0
(21)	CN + H2⇆ HCN + H	2.95 × 10^5	0.00	1,130	[24]/𝐹=3.2–5.0
(22)	CN + C ⇆ C2 + N	5.00 × 10^13	0.00	13,000	[14]/𝐹=2.0–5.0
(23)	N + H2⇆ NH + H	1.60 × 10^14	0.00	12,650	[25]/𝐹=1.26–2.0
(24)	C + N2⇆ CN + N	5.24 × 10^13	0.00	22,600	[7]/𝐹=1.6–2.0
(25)	C + H2⇆ CH + H	4.00 × 10^14	0.00	11,700	[26]/𝐹=1.6–2.0
(26)	H + N2⇆ NH + N	3.00 × 10^12	0.50	71,400	[27]/𝐹=2.0–3.2
(27)	H + CH4⇆ CH3 + H2	1.32 × 10^4	3.00	4,045	[7, 17]/𝐹=1.6–2.0
Ionization reactions
(28)	N + N ⇆ N^+2 + e^−	4.40 × 10^7	1.50	67,500	[14]/𝐹=10.0
(29)	C + N ⇆ CN^+ + e^−	1.00 × 10^15	1.50	164,400	[1]/𝐹≥10.0
(30)	N + e^−⇆ N^+ + e^− + e^−	2.50 × 10^34	−3.82	168,600	[14, 28]/𝐹=10.0
(31)	C + e^−⇆ C^+ + e^− + e^−	3.70 × 10^31	−3.00	130,720	[14]/𝐹=10.0
(32)	H + e^−⇆ H^+ + e^− + e^−	2.20 × 10^30	−2.80	157,800	[14]/𝐹≥10.0
(33)	Ar + e^−⇆ Ar^+ + e^− + e^−	2.50 × 10^34	−3.82	181,700	[1]/𝐹≥10.0
(34)	CN^+ + N ⇆ CN + N^+	9.80 × 10^12	0.00	40,700	[1]/𝐹≥10.0
(35)	C^+ + N2⇆ N^+2 + C	1.11 × 10^14	−0.11	50,000	[1]/𝐹≥10.0