Effect of local rearrangements in the particle bed on the stability of filtration combustion of solid fuel

Scaling up self-sustained smouldering of sewage sludge for waste-to-energy

“…This shows the combination of non-uniform air flux and non-uniform reactions severely slowing smouldering propagation. This phenomenon is similar to differences in permeabilities leading to airflow distortions and air channelling in other combustion systems using porous media (e.g., (Glazov et al, 2017;Solinger et al, 2020;Taira, 2020;Wang et al, 2021)). However, the air channelling here is expected to be driven by differences in air thermophysical properties.…”

Heat losses in applied smouldering systems: Sensitivity analysis via analytical modelling

“…Smouldering combustion research has traditionally focused on hazards in combustible porous materials (e.g., polyurethane foam, biomass), including within home furniture, spacecrafts, coal mines, and peatland fires [1][2][3][4]. However, smouldering (sometimes called filtration combustion [5][6][7][8]) is also being used as an engineering tool across various disciplines to address a wide range of challenges. It is clear from applications such as brownfield site remediation [9][10][11][12][13], energy conversion [5,14], wastewater sludge treatment [15,16], waste processing and resource recovery [6,17], and sanitation in the developing world [18], that smouldering is emerging as a simple, economical, and robust technology.…”

Gas-Vapor Mixture Temperature in the Near-Surface Layer of a Rapidly-Evaporating Water Droplet

“…The solution of this problem, as illustrated by single droplets, is useful to gain new fundamental knowledge of the physical aspects of water evaporation in a hot gas flow, and to understand how the contribution of a vapor cloud to fighting fires can change when the volume of injected water increases greatly. In general, the research findings are important for the development of promising high-temperature gas-steam-droplet applications [ 34 , 35 , 36 , 37 , 38 , 39 , 40 ] in the thermal treatment of liquids from impurities, producing syngas from coal–water compositions, and waste-heat recovery in contact water heaters and superheaters.…”