Effects of Stefan flow and CO oxidation on char particle combustion in O2/CO2 atmosphere
Effects of Stefan flow and CO oxidation on char particle combustion in O2/CO2 atmosphere
复制标题
Stefan 流和 CO 氧化对 O2/CO2 气氛中炭颗粒燃烧的影响
DOI：
10.1016/j.fuel.2013.01.005
复制
发表时间：
2013-04
期刊：
影响因子：
7.4
通讯作者：
Ou, Wei
中科院分区：
文献类型：
--
作者：
Yu, Juan;Zhou, Kuan;Ou, Wei
Stefan flow occurring at the surface of char and CO oxidation in the boundary layer are often neglected in the conventional pulverized-coal air combustion. In this work, effects of Stefan flow and CO oxidation in the oxy-fuel burning are investigated numerically and experimentally. A mathematical model is firstly developed for the combustion of a carbon particle. Comparisons with the experiment data exhibit better agreement for the present model than that neglecting the effects of Stefan flow and CO oxidation. Predictions also show that neglect of the Stefan flow and CO oxidation results in overestimating the particle temperature, shortening the burnout time, and especially, being unable to predict the particle extinguishment and the final burnout rate correctly. Notable effects of Stefan flow and CO oxidation on the burnout time generally appear under conditions of lower O2concentration, lower reactivity, lower gas temperature and larger particle size where the combustion is prone to be controlled by reaction kinetics and gas diffusion simultaneously (Regime II). On the contrary, the effects of Stefan flow and CO oxidation are relatively insignificant on the burnout time in the diffusion-controlled combustion (Regime III). However, whether the Stefan flow and CO oxidation could be neglected in such cases still depends on the actual combustion conditions and simulation results.
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DOI：
10.1016/b978-0-12-669550-2.50019-1
发表时间：
1980
期刊：
--
影响因子：
--
作者：
N. Amundson;E. Mon
通讯作者：
N. Amundson;E. Mon
影响因子：
5.3
作者：
Juan Yu;M. C. Zhang
通讯作者：
Juan Yu;M. C. Zhang
影响因子：
4.4
作者：
Murphy, JJ;Shaddix, CR
通讯作者：
Shaddix, CR
DOI：
--
发表时间：
1989
期刊：
--
影响因子：
--
作者：
Y. Çengel;M. Boles
通讯作者：
Y. Çengel;M. Boles
影响因子：
4.4
作者：
E. Hecht;C. Shaddix;M. Geier;A. Molina;B. Haynes
通讯作者：
E. Hecht;C. Shaddix;M. Geier;A. Molina;B. Haynes