Carbon porosity characterization via small angle neutron scattering

Study of Activation of Coal Char

“…This conclusion is supported by recent small-angle neutron scattering (SANS) results [46,47] showing a large amount closed-off internal microporosity, which can be opened at low extents of gasification in the Wyodak char [47]. The Pittsburgh No.…”

The application of small angle scattering techniques to porosity characterization in carbons

“…For example, Wyodak coal char samples were contrast-matched with perdeuterated toluene [32]. ''Difference'' curves correlated very well with the BET surface areas of the samples as a function of activation.…”

“…Hall et al have applied contrast matching small angle neutron scattering (CM-SANS) to investigate ''closed'' porosity in a variety of materials, including polymer resins [30], coal char [31,32], and vapor-deposited metal alloys [33]. The technique consists of performing SANS on ''dry'' samples where the total scattering is from all the porosity; i.e., both ''open'' and ''closed'' pores.…”

“…This technique has been applied to carbons and chars by Hall and co-workers [15,31,32]. For example, Wyodak coal char samples were contrast-matched with perdeuterated toluene [32].…”

Study of Activation of Coal Char

“…This conclusion is supported by recent small-angle neutron scattering (SANS) results [41,42] showing a large amount closed-off internal microporosity, which can be opened at low extents of gasification in the Wyodak char [42]. The Pittsburgh No.…”