Shock Tube Study of Syngas Ignition in Rich CO2 Mixtures and Determination of the Rate of H + O2 + CO2 → HO2 + CO2

被引：56
作者：
Vasu, Subith S. [1 ]
Davidson, David F. [1 ]
Hanson, Ronald K. [1 ]
机构：
[1] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA
来源：
ENERGY & FUELS | 2011年 / 25卷 / 03期
关键词：
CO/H-2 FUEL BLENDS; KINETIC MECHANISM; CARBON-MONOXIDE; HIGH-PRESSURE; ELEVATED PRESSURES; WIDE-RANGE; COMBUSTION; OH; HYDROGEN; OXIDATION;
D O I：
10.1021/ef1015928
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Ignition delay times for stoichiometric syngas mixture with large excess of CO2 were measured behind reflected shcok waves in the following range temperatures of 974-,1106K, pressure of 101-2.6 atm, and a syngas/air mixture of H-2 = 8.91% mechanisms show that will validated mechanisms are able to capture the trends in data. Sensitivity analyses indiacte the importance of the chain branching. H + O-2 = O + OH (RI) reaction along with the termination H + O-2 + CO2 (R2) reaction for the entire experimental range. Measurement of K-2 was the carried out near 1300k and 8 atm in separate experiments using widely used GRI-Mech V3.0 natural gas mechanism.Hence we are recommend the low pressure limiting expression provided by GRI-Mech v3.0 mechanism, k(0()Co2) =4.2 x 10(18) x T[K](-.86) (cm(6/)mol(2/)s) for use with kinetic modeling for the range T = 800-1305 K and p= 1-8 atm. To the best of our knowledge, we present the first ignition delay times for H-2/CO mixtures with CO2 addition and the first high-temperature(T > 900k) determination of K-2
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页码：990 / 997
页数：8
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