Safer and stronger together? Effects of the agglomeration on nanopowders explosion

Among the factors influencing dust explosion, particle size distribution (PSD) is both one of most important and complex to consider. For instance, it commonly accepted that explosion sensitivity increases when decreases. Such an assertion may be questionable for nano-objects which easily agglomerate. However, agglomerates can broken during dispersion process. Correlating parameters actual PSD a cloud at moment ignition becomes then essential. The effects moisture content sieving were investigated on nanocellulose powder impact mechanical agglomeration was evaluated using silicon coated by carbon powder. Each sample characterized before after in situ laser measurement fast mobility sizer, minimum energy tests conducted respectively 20 L sphere modified Hartmann tube. It observed drying and/or mainly led variations terms but only slightly severity. In contrast, great decrease sensitivity, with varying from 5 mJ raw more than 1J agglomerated samples. maximum rate pressure rise also decreased due modifications reaction kinetics, inducing transition St2 class St1 agglomerating dust.