CFCMS microporous

The development of microporosity during steam activation was examined by Burchell et al [23] in their studies of CFCMS monoliths. A series of CFCMS cylinders, 2.5 cm in diameter and 7.5 cm in length, were machined from a 5- cm thick plate of CFCMS manufactured from P200 fibers. The axis of the cylinders was machined perpendicular to the molding direction ( to the fibers). The cylinders were activated to bum-offs ranging from 9 to 36 % and the BET surface area and micropore size and volume determined from the Nj adsorption isotherms measured at 77 K. Samples were taken from the top and bottom of each cylinder for pore sfructure characterization. 

Table 1. Micropore sfructure development during steam activation for CFCMS...

Fig.l3. Variation of DR micropore volume in a large CFCMS monolith with 10 4 wt% bum-off [27],... 

Table 2. Micropore structure data for large CFCMS monoliths activated via the O2 chcmisorption/activation route [7,27]...

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