Mock, ChinsungLee, HookyungChoi, Seuk-CheunYang, WonChoi, SangminManovic, Vasilije2018-10-262018-10-262018-09-21Mock C, Lee H, Choi SC, et al., (2018) Combustion behaviour of single pellets of coal–wood mixtures in a hot gas flow field. Energy Fuels, Volume 32, Issue 11, November 2018, pp. 11913-119230887-0624http://doi.org/10.1021/acs.energyfuels.8b02557http://dspace.lib.cranfield.ac.uk/handle/1826/13578This experimental study explores the burning characteristics of single pellets made of wood and coal mixtures for co-firing. Three types of pellets were prepared with different wood–coal ratios (100:0, 80:20, and 50:50). Experiments were carried out in a laboratory reactor at rapid heating rates and under oxygen concentrations between 10 and 40%. To investigate their combustion behavior, single pellets were suspended on a wire injected into a hot gas stream at 1340 K and flame and char combustion were recorded through an observation window by means of a high-resolution (4K) camera. The sequential combustion time, volatile flame characteristics, and mass reduction rate were obtained over a time profile by carefully controlled particle injection. The results demonstrated that the char combustion time increased significantly in comparison to the volatile combustion time, which only varied a little, when the pellets contained coal in the mixture. Partially detached flames were also predominantly observed on pure biomass pellets at oxygen concentrations between 21 and 40%. During the homogeneous combustion period, the cross-sectional area of a pellet shrunk by 26.3–37.5% depending upon the type of pellet.enAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/Article