Kinetic effect of alkylaromatics on the thermal stability of hydrocarbons under geological conditions

Catalytic Cracking of Heavy Aromatics and Polycyclic Aromatic Hydrocarbons over Fluidized Catalytic Cracking Catalysts

“…Perez and Raimondo also observed that a molecule which has some structural similarity to that of biphenyl, such as 1-phenylnaphthalene, converted to only 1.5% when pyrolyzed at 450 ºC. 34 The condensed polyaromatic model compounds naphthalene, phenanthrene and pyrene also showed important selectivities to benzene, though smaller than those of the other reactants, given their higher thermal stability and minor H/C (refer to Figure 3). In the case of 1PhO minor yields of toluene, ethylbenzene, xylenes and C 2 -C 8 olefins and paraffins besides benzene were also observed, which can be explained based on the scission of the C8 side chain.…”

Pyrolysis mechanism of the n-octane/H2S mixture at 70MPa and 603–623K

“…They confirm that the conversion of noctane in the presence of H 2 S is lower than that of pure n-octane at identical pyrolysis duration: the n-octane pyrolysis is inhibited by H 2 S. In order to quantify this inhibition effect, the inhibition factor (I.F.) can be used [24][25][26][27]. It is defined as the ratio of pure n-octane conversion to n-octane conversion in binary mixture at identical pyrolysis conditions.…”

“…In the case of a chain reaction, the inhibition mechanism was highlighted by Niclause et al [63] and used to explain the inhibition effect of some compounds (toluene, decylbenzene and tetralin) on n-alkane pyrolysis [24][25][26][27]. To summarize, an inhibitor is a coreactant that can easily convert a chain carrier radical into a less reactive radical which leads to new terminations.…”

“…A great number of studies were related to the thermal decomposition of pure aliphatic [10][11][12][13][14][15] and aromatic compounds [16][17][18][19][20][21][22][23], but a lot of works showed that the influence of the cross-reactions between the different compounds is determining [24][25][26][27] and cannot be inferred from the pyrolysis of pure compounds. Consequently, the pyrolysis of several binary mixtures was investigated and the corresponding detailed kinetic models were constructed and validated at high pressure (10-100 MPa) and middle temperature (573-773 K) in order to be extrapolated to reservoir temperature (373-473 K).…”

Stability of a Petroleum-Like Hydrocarbon Mixture at Thermobaric Conditions That Correspond to Depths of 50 km

“…The results of an experimental study of the thermal stability and decomposition of individual hydrocarbons at temperatures up to 450 • C are presented in the literature [11][12][13]. In another study, experiments have been conducted under a pressure of 70 MPa at temperatures up to 330 • C [14]. One of the main conclusions from the above-mentioned experimental results could be summarized as follows: the thermal stability of individual hydrocarbons differs greatly from that of the same hydrocarbons in a mixture.…”