Dec 15, 2019 The briquettes that contain biomass (i.e. B1 and B2) produce a reduction of around 45% in coking pressure at 10 wt% addition, even in the case of briquette B2 which contains coal A in its composition. Accordingly, briquettes B1 and B2 produce and important reduction of ΔPmax in the permeability test. In the case of B3 which also contains coal ...