Key words: propylene, supercritical water, pyrite, oligomerization, sulfidation, synergetic effect
The effect of supercritical water and pyrite on the transformations of propylene at
programmed heating (1.5 K/min) of the reagents to 718 K is studied. The products are
analyzed by IR and 1H NMR spectroscopy, mass-spectrometry and gas chromatography/mass-spectrometry.
Based on the temperature dependences of pressure of the reagents
it is stated that in the absence of water, the addition of pyrite reduces the initial
temperature of propylene oligomerization. In the absence of pyrite, the addition of
water suppresses the propylene oligomerization. A synergetic effect of supercritical
water and pyrite on the degree of propylene conversion is revealed. It is shown that in
the presence of pyrite, hydrogen sulfide, thiols and methyl-derivatives of thiophene are
formed and the yield of aromatic and polyaromatic hydrocarbons is increased. The
mechanisms of the observed processes are discussed.
doi:10.1134/S1990793117070089