Skip to content

Commit

Permalink
Added the C2H4+O_Klipp2017 kinetic library
Browse files Browse the repository at this point in the history
The reaction of atomic oxygen with ethylene is a fundamental oxidation
step in combustion. Since it involves an intersystem crossing from a
triplet surface to a singlet surface it requires special treatment.
Data taken from http://dx.doi.org/10.1016/j.proci.2016.06.053
  • Loading branch information
alongd committed Oct 18, 2017
1 parent 7420f10 commit 0d91e26
Show file tree
Hide file tree
Showing 2 changed files with 202 additions and 0 deletions.
104 changes: 104 additions & 0 deletions input/kinetics/libraries/C2H4+O_Klipp2017/dictionary.txt
Original file line number Diff line number Diff line change
@@ -0,0 +1,104 @@
C2H4
1 C u0 p0 c0 {2,D} {3,S} {4,S}
2 C u0 p0 c0 {1,D} {5,S} {6,S}
3 H u0 p0 c0 {1,S}
4 H u0 p0 c0 {1,S}
5 H u0 p0 c0 {2,S}
6 H u0 p0 c0 {2,S}

O
multiplicity 3
1 O u2 p2 c0

CH3
multiplicity 2
1 C u1 p0 c0 {2,S} {3,S} {4,S}
2 H u0 p0 c0 {1,S}
3 H u0 p0 c0 {1,S}
4 H u0 p0 c0 {1,S}

HCO
multiplicity 2
1 C u1 p0 c0 {2,S} {3,D}
2 H u0 p0 c0 {1,S}
3 O u0 p2 c0 {1,D}

CH3CO
multiplicity 2
1 C u0 p0 c0 {2,S} {4,S} {5,S} {6,S}
2 C u1 p0 c0 {1,S} {3,D}
3 O u0 p2 c0 {2,D}
4 H u0 p0 c0 {1,S}
5 H u0 p0 c0 {1,S}
6 H u0 p0 c0 {1,S}

H
multiplicity 2
1 H u1 p0 c0

CH2CHO
multiplicity 2
1 C u1 p0 c0 {2,S} {3,S} {4,S}
2 H u0 p0 c0 {1,S}
3 H u0 p0 c0 {1,S}
4 C u0 p0 c0 {1,S} {5,D} {6,S}
5 O u0 p2 c0 {4,D}
6 H u0 p0 c0 {4,S}

C2H3
multiplicity 2
1 C u1 p0 c0 {2,S} {3,D}
2 H u0 p0 c0 {1,S}
3 C u0 p0 c0 {1,D} {4,S} {5,S}
4 H u0 p0 c0 {3,S}
5 H u0 p0 c0 {3,S}

OH
multiplicity 2
1 O u1 p2 c0 {2,S}
2 H u0 p0 c0 {1,S}

CH2
multiplicity 3
1 C u2 p0 c0 {2,S} {3,S}
2 H u0 p0 c0 {1,S}
3 H u0 p0 c0 {1,S}

CH2O
1 C u0 p0 c0 {2,D} {3,S} {4,S}
2 O u0 p2 c0 {1,D}
3 H u0 p0 c0 {1,S}
4 H u0 p0 c0 {1,S}

CH2CO
1 C u0 p0 c0 {2,D} {4,S} {5,S}
2 C u0 p0 c0 {1,D} {3,D}
3 O u0 p2 c0 {2,D}
4 H u0 p0 c0 {1,S}
5 H u0 p0 c0 {1,S}

H2
1 H u0 p0 c0 {2,S}
2 H u0 p0 c0 {1,S}

CH4
1 C u0 p0 c0 {2,S} {3,S} {4,S} {5,S}
2 H u0 p0 c0 {1,S}
3 H u0 p0 c0 {1,S}
4 H u0 p0 c0 {1,S}
5 H u0 p0 c0 {1,S}

CO
1 C u0 p1 c-1 {2,T}
2 O u0 p1 c+1 {1,T}

C2H2
1 C u0 p0 c0 {2,T} {3,S}
2 C u0 p0 c0 {1,T} {4,S}
3 H u0 p0 c0 {1,S}
4 H u0 p0 c0 {2,S}

H2O
1 O u0 p2 c0 {2,S} {3,S}
2 H u0 p0 c0 {1,S}
3 H u0 p0 c0 {1,S}
98 changes: 98 additions & 0 deletions input/kinetics/libraries/C2H4+O_Klipp2017/reactions.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,98 @@
#!/usr/bin/env python
# encoding: utf-8

name = "C2H4+O_Klipp2017"
shortDesc = u"C2H4 + O surface with product branching"
longDesc = u"""
The reaction of atomic oxygen with ethylene is a fundamental oxidation step in combustion.
Decomposition of the initial adduct via spin-allowed reaction channels on the triplet surface competes
with intersystem crossing (ISC) and a set of spin-forbidden reaction channels on the ground-state singlet
surface. This library describes product branching ratios based on the following publication:
X. Li, A.W. Jasper, J. Zádor, J.A. Miller, S.J. Klippenstein,
Theoretical kinetics of O + C2H4,
Proceedings of the Combustion Institute 36 (2017) 219–227
http://dx.doi.org/10.1016/j.proci.2016.06.053
Several different methods were used:
CCSDT(Q)/cc-pVDZ//CCSD(T)/cc-pVTZ
For barrierless reactions on the spin allowed surface CASPT2(2e,2o)/cc-pVTZ was used.
For reaction with barriers on the spin allowed surface CCSD(T)/CBS//B2PLYPD3/cc-pVTZ was used.
The total ISC rate was calculated using Landau–Zener statistical theory
non-statistical “prompt” branching in the dynamics immediately following ISC was predicted using
direct classical trajectories and the CASPT2(2e,2o)/cc-pVDZ surface.
Pressure dependence in the product branching fractions and the potential formation of stabilized products were
considered, but results show that rates are pressure-independent (with < 10% variations in the branching fractions)
up to 20 bar at 300 K and up to 200 bar at 1000 K.
Channels which account for less than 1% of the products are given in this library a low rate: 1e7 cm^3/(mol*s)
(reactions 1a, 1b, 1c, 1e, 1f are all in the 1e10-1e13 cm^3/(mol*s) range at the 300-2500 K range)
Library written by alongd
"""

entry(
index = 1,
label = "C2H4 + O <=> CH3 + HCO",
degeneracy = 1,
kinetics = Arrhenius(A=(3.319e+13,'cm^3/(mol*s)'), n=-1.717, Ea=(2893,'cal/mol'), T0=(298,'K'), Tmin=(300,'K'), Tmax=(2500,'K')),
longDesc = u"""Reaction 1a""",
)

entry(
index = 2,
label = "C2H4 + O <=> CH3CO + H",
degeneracy = 1,
kinetics = Arrhenius(A=(5.485e+11,'cm^3/(mol*s)'), n=-0.4843, Ea=(1958,'cal/mol'), T0=(298,'K'), Tmin=(300,'K'), Tmax=(2500,'K')),
longDesc = u"""Reaction 1b""",
)

entry(
index = 3,
label = "C2H4 + O <=> CH2CHO + H",
degeneracy = 1,
kinetics = Arrhenius(A=(2.022e+12,'cm^3/(mol*s)'), n=0.9475, Ea=(1724,'cal/mol'), T0=(298,'K'), Tmin=(300,'K'), Tmax=(2500,'K')),
longDesc = u"""Reaction 1c""",
)

entry(
index = 4,
label = "C2H4 + O <=> C2H3 + OH",
degeneracy = 1,
kinetics = Arrhenius(A=(1e+7,'cm^3/(mol*s)'), n=0, Ea=(0,'cal/mol'), T0=(298,'K'), Tmin=(300,'K'), Tmax=(2500,'K')),
longDesc = u"""Reaction 1d""",
)

entry(
index = 5,
label = "C2H4 + O <=> CH2 + CH2O",
degeneracy = 1,
kinetics = Arrhenius(A=(4.868e+11,'cm^3/(mol*s)'), n=1.991, Ea=(2860,'cal/mol'), T0=(298,'K'), Tmin=(300,'K'), Tmax=(2500,'K')),
longDesc = u"""Reaction 1e""",
)

entry(
index = 6,
label = "C2H4 + O <=> CH2CO + H2",
degeneracy = 1,
kinetics = Arrhenius(A=(3.315e+12,'cm^3/(mol*s)'), n=-1.831, Ea=(3180,'cal/mol'), T0=(298,'K'), Tmin=(300,'K'), Tmax=(2500,'K')),
longDesc = u"""Reaction 1f""",
)

entry(
index = 7,
label = "C2H4 + O <=> CH4 + CO",
degeneracy = 1,
kinetics = Arrhenius(A=(1e+7,'cm^3/(mol*s)'), n=0, Ea=(0,'cal/mol'), T0=(298,'K'), Tmin=(300,'K'), Tmax=(2500,'K')),
longDesc = u"""Reaction 1g""",
)

entry(
index = 8,
label = "C2H4 + O <=> C2H2 + H2O",
degeneracy = 1,
kinetics = Arrhenius(A=(1e+7,'cm^3/(mol*s)'), n=0, Ea=(0,'cal/mol'), T0=(298,'K'), Tmin=(300,'K'), Tmax=(2500,'K')),
longDesc = u"""Reaction 1h""",
)

0 comments on commit 0d91e26

Please sign in to comment.