期刊
FUEL PROCESSING TECHNOLOGY
卷 199, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fuproc.2019.106256
关键词
Fuel-NO; Mechanism evaluation; Oxy-fuel combustion; CFD; MILD combustion
资金
- National Natural Science Foundation of China [91641122, 51406001, 51906075]
- Wuhan Morning Light Plan of Youth Science and Technology [2017050304010290]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
Although fuel-NO formation is significant for the combustion of pulverized coal, biomass, and heavy distillate fuels, its mechanism has not been systematically validated under air and oxy-fuel combustion. This is the first study that quantitatively evaluates detailed fuel-NO mechanisms against large experimental datasets from a jet stirred reactor (JSR) under both air and oxy-fuel combustion. The mechanism with the best overall performance is thoroughly reduced and validated. A skeletal fuel-NO mechanism including only 35 species is obtained using methods of directed relation graph with error propagation (DRGEP), DRGEP-aided sensitivity analysis, and computational singular perturbation. The skeletal mechanism is comprehensively validated and agrees well with the detailed mechanism and experiments predicting the ignition delay, temperatures, and concentrations of important species in JSRs, laminar flame speeds, and flame extinction under both air and oxy-fuel combustion. Moreover, the skeletal mechanism is successfully applied to the finite-rate modeling of moderate or intense low-oxygen dilution (MILD) combustion of pulverized coal. Unlike conventional semi-empirical post-processing modeling of fuel-NO production, the fuel-NO calculation in this study is coupled with coal combustion by using the well-validated skeletal mechanism. A highly precise in-furnace distribution of fuel-NO critical precursors (i.e., NH3 and HCN) and detailed fuel-NO reaction pathway under the MILD combustion are obtained.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据