Detailed uncertainty analysis was performed to estimate the errors
in the measured rate constants for reaction (R1) at 1224 K and
1.44 atm. The sources of errors considered here include the temperature
(±0.7%), the mixture composition (±5%), the OH absorption
coefficient (±3%), the wavemeter reading (±0.002 cm1
), fitting the
experimental profiles (±5%), locating time zero (±0.5 ls), the rate
constant of CH3 þ OH () CH2ðsÞ þ H2O (uncertainty factor = 2),
and the rate constant of CH3 þ CH3ðþMÞ () C2H6ðþMÞ ð20%Þ.
The contribution of each of these error sources on the determination
of k1 is calculated separately and presented in Fig. 12. The overall
uncertainty is calculated using the root-sum-squared method and
is found to be ±15% for k1 at 1224 K.
Detailed uncertainty analysis was performed to estimate the errorsin the measured rate constants for reaction (R1) at 1224 K and1.44 atm. The sources of errors considered here include the temperature(±0.7%), the mixture composition (±5%), the OH absorptioncoefficient (±3%), the wavemeter reading (±0.002 cm1), fitting theexperimental profiles (±5%), locating time zero (±0.5 ls), the rateconstant of CH3 þ OH () CH2ðsÞ þ H2O (uncertainty factor = 2),and the rate constant of CH3 þ CH3ðþMÞ () C2H6ðþMÞ ð20%Þ.The contribution of each of these error sources on the determinationof k1 is calculated separately and presented in Fig. 12. The overalluncertainty is calculated using the root-sum-squared method andis found to be ±15% for k1 at 1224 K.
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