Abstract
AbstractDesert sand reactivity with halocarbons like CCl3F (F11), CCl2F2 (F12) and CHCl2F (F21) has been proved. Reactivity increases in the sense: F12 ⩽ F21 < F11 and is favoured by temperature and short activation of samples at 673 K. For F11, the main reaction products are CCl4 and COCl2, but some transformation to F12 has been observed too. An influence of the desert sand origin (i.e. of its phase composition) has been also found. — X‐ray photoelectron spectra of samples after reaction show the presence of F and Cl on their surface, mainly as calcium halides, and in direct proportionality with reactivity.
Published Version
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