Shock-tube and modeling study of ethane pyrolysis and oxidation

Journal Article · Tue Feb 01 04:00:00 EST 2000 · Combustion and Flame

DOI:https://doi.org/10.1016/S0010-2180(99)00102-9· OSTI ID:20019013

Hidaka, Yoshiaki; Sato, Kazutaka; Hoshikawa, Hiroki; Nishimori, Toshihide; Takahashi, Rie; Tanaka, Hiroya; Inami, Koji; Ito, Nobuhiro

Pyrolysis and oxidation of ethane were studied behind reflected shock waves in the temperature range 950--1,900 K at pressures of 1.2--4.0 atm. Ethane decay rates in both pyrolysis and oxidation were measured using time-resolved infrared (IR) laser absorption at 3.39 {micro}m, and CO{sub 2} production rates in oxidation were measured by time-resolved thermal IR emission at 4.24 {micro}m. The product yields were also determined using a single-pulse method. The pyrolysis and oxidation of ethane were modeled using a reaction mechanism with 157 reaction steps and 48 species including the most recent submechanisms for formaldehyde, ketene, methane, acetylene, and ethylene oxidation. The present and previously reported shock tube data were reproduced using this mechanism. The rate constants of the reactions C{sub 2}H{sub 6} {yields} CH{sub 3} + CH{sub 3}, C{sub 2}H{sub 5} + H {yields} H{sub 2} and C{sub 2}H{sub 5} + O{sub 2} {yields} C{sub 2}H{sub 4} + HO{sub 2} were evaluated. These reactions were important in predicting the previously reported and the present data, which were for mixture compositions ranging from ethane-rich (including ethane pyrolysis) to ethane-lean. The evaluated rate constants of the reactions C{sub 2}H{sub 5} + H {yields} C{sub 2}H{sub 4} + H{sub 2} and C{sub 2}H{sub 5} + O{sub 2} {yields} C{sub 2}H{sub 4} + HO{sub 2} were found to be significantly different from currently accepted values.

• Research Organization: Ehime Univ., Matsuyama (JP)
• OSTI ID: 20019013
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 3 Vol. 120; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
CARBON DIOXIDE
CHEMICAL REACTION YIELD
COMBUSTION KINETICS
COMBUSTION WAVES
ETHANE
NATURAL GAS
OXIDATION
PYROLYSIS
REACTION INTERMEDIATES