Combustion characteristics of millimeter-sized aluminum particles in fluidized bed under various O_(2)/CO_(2)/H_(2)O atmospheres Author links open overlay panel  

作　　者：Jialing Zhou Rui Zhang Dong Liu 

机构地区：[1]Key Laboratory of Thermal Control of Electronic Equipment,Ministry of Industry and Information Technology,Nanjing,210094,China [2]Advanced Combustion Laboratory,School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing,210094,China

出　　处：《Particuology》2024年第8期315-322,共8页颗粒学报（英文版）

基　　金：supported by the National Key R&D Program of China(grant No.2020YFC1910000).

摘　　要：Aluminum is an attractive alternative fuel,but it burns very inefficiently due to the formation of a dense Al_(2)O_(3)layer which prevents O_(2)from diffusion to the surface of Al particles.In previous experiments,the combustion of millimeter-sized Al(mAl)particles in the fluidized bed has achieved a substantial increase in the combustion efficiency,but further improvements are still needed.In this study,the effects of reaction atmosphere on the fluidized combustion of mAl particles were investigated.The experiments with different O_(2)/H_(2)O/CO_(2)concentrations were conducted.The experimental results indicate that the combustion efficiency of mAl particles in fluidized bed increases as the mole fraction of O_(2),H_(2)O or CO_(2)increases,and the highest combustion efficiency can reach 38.7%.After the analysis of the oxide film on the surface of aluminum particles,it was found that it is easier to generate the unstableθ-Al_(2)O_(3)under CO_(2)atmosphere,and it is easier to generate the unstableγ-Al_(2)O_(3)andθ-Al_(2)O_(3)under H_(2)O atmosphere.The unstable Al_(2)O_(3)film is more likely to be abraded in the fluidized bed,which leads to the effective improvement of the combustion efficiency.

关 键 词：Al combustion Fluidized bed Atmosphere Combustion efficiency 

分 类 号：TQ051.1[化学工程]