Accelerant is on the chips, not in them
The study by Dr. Jim Millette has confirmed that the red/gray chips found in the dust associated with the destruction of the World Trade Center (WTC) are paint chips. The WTC steel featured several different primer paints, with Tnemec used for the perimeter columns, and Laclede – which contains no zinc – for the floor trusses. However, this does not mean that the paper by Harrit et al is useless. On the contrary, the Harrit study did find physical evidence of accelerants. The paint chips are certainly not thermitic; they contain no elemental aluminum. But they were contaminated by a small amount of accelerants, with elemental Al part of the composition. The most likely source is fireproofing that was directly adjacent to the primer and was “upgraded” between 1996 and 1998. For WTC1, there is an exact match between the five floors of the impact zone (94-98) and the five contiguous floors with upgraded SFRM of a high density compared to SFRM on other upgraded floors. When Harrit’s chips were heated to 700 °C, the primary exotherm seen in differential scanning calorimeter (DSC) traces denotes combustion of the paint’s organic material, which is probably Laclede primer’s epoxy binder. The yield from thermite – or from aluminum reacting with iron oxide in the paint – was up to five orders of magnitude lower than the yield from organic material. This would explain the absence of a secondary peak from thermite, although the Intermont curve has an interesting trough at 640 °C and then gradually goes into positive territory at 700 °C. The MacKinlay samples’ 395 °C peaks are consistent with polyisobutylene (BR), used as a binding agent in plastic explosives. Millette found no elemental Al after an MEK soak, and no evidence of thermite. Harrit et al not only found elemental Al after an MEK soak, but also iron-rich spheres in the residue after chips were subjected to heating in a DSC – evidence that a thermite reaction had occurred. The conflicting results may be due to the fact that Millette’s chips were “washed in clean water” prior to analysis, whereas Harrit’s “samples were left unwashed and uncoated unless otherwise specified”. Elemental aluminum and oxidizer(s) from the accelerant weren’t in the chips; they were on the outer surface of the red layer, which corresponds to the left-hand side of Harrit’s Figures (12) (b) and (15) (c). Information contained within this page not only proves beyond all doubt that OBL and KSM did not orchestrate 9/11, but identifies the principal perpetrators.
Link to paper here