Kinetics of the Hydrodealkylation of Methylnaphthalenes in a Nonisothermal Flow Reactor

Hydrodealkylation of 1-ethylnaphthalene and its side reactions. A kinetic study

“…Apparatus and Procedure. They were as described by Beltrame et al (1975Beltrame et al ( , 1979. The axial temperature profile measured along the reactor (Stull et al, 1969) for the benzene analogues of the naphthalenic compounds.…”

“…Kinetic calculations were performed only for the highpressure runs according to reaction scheme 9. As in previous works (Beltrame et al, 1975(Beltrame et al, ,1979, the fluid motion in the annular reactor was treated as laminar. By an approximate method, the reactor was considered as the sum of four segregated plug-flow reactors, characterized by different values of the fluid velocity, according to a procedure for the partition of the gas flow into cylindrical coaxial crusts (Carniti et al, 1979).…”

“…Under these approximations, hydrogen concentration may be incorporated into kinetic coefficients defined as For the determination of kinetic parameters, large use has been made of previous results concerning AMN and 2-ethylnaphthalene (BEN) (Beltrame et al, 1975(Beltrame et al, ,1979), so we knew values of k2, n2, and m2, and their confidence limits; furthermore, assuming a strict analogy between AEN and BEN, it was taken that mx = 1; nx = 0; m3 = m2; n3 = n2. Dehydrogenation 6 was considered as first-order with respect to the hydrocarbon, that is m6 = 1.…”

“…In Ch2. However, such a set was not available; a Standard deviations: ± 0.5 for log A, ± 2 kcal/mol for E. b Parameter values from a previous work (Beltrame et al, 1975).…”

“…Arrhenius parameters and reaction orders were obtained that reproduce experimental molar conversions ±18% on the average. Reaction products and kinetics of the thermal hydrodealkylation of 1-and 2-methylnaphthalene and of 2ethylnaphthalene have been studied previously (Beltrame et al, 1975(Beltrame et al, ,1976(Beltrame et al, ,1979. Both ethylnaphthalenes are interesting as models of the higher alkylnaphthalenes that can be employed in industrial applications.…”