Irreversible reaction

C7H8+H2C6H6+CH4

Direction
Irreversible
Processes
1
Stated as
Fixed conversion
Heat of reaction
ΔH = -41,764 kJ/kmol (one process)
Element balance
Checked: balances
As the processes state itStoichiometry, conversions, heats of reaction and catalyst windows are taken from each process's files with their provenance. The build checks only that each process's equation balances in every element, from the process's own component formulas; it does not check the numbers. A process's design maturity applies to them.

Species

SpeciesNameCASRoleCoefficient
C7H8Toluene108-88-3reactant-1
H2Hydrogen1333-74-0reactant-1
C6H6Benzene71-43-2product1
CH4Methane74-82-8product1

In the processes

  • Toluene hydrodealkylation to benzene (100 kt/a, thermal HDA)Concept · not reviewed

    HDAC7H8 + H2 → C6H6 + CH4

    Stated as
    Fixed conversion
    Element balance
    Balances in every element
    Conversion
    75 % of TOL (given: US 3,291,849 A (C. C. King, J. F. Campagnolo, L. M. Lehman; Hydrocarbon Research, Inc.), Hydrodealkylation, granted 1966-12-13, detailed description, the paragraph beginning 'The reactor 44 is an internally insulated open chamber': a non-catalytic toluene reactor at about 600 psig, 20-40 s residence and at most 1350 F, controlled so that about 75 % of the toluene in its total feed is converted; read in full text at https://patents.google.com/patent/US3291849 on 2026-11-03 (process/reaction-evidence.yaml O1, D-021). Adopted from the patent's reactor as the design value of R-101: R-101's volume and residence time are not designed to it. The patent's reactor holds its temperature profile with quench gas added at points along the reactor; R-101 is a single adiabatic vessel without intermediate quench, at 3450-3380 kPa(a) (485 psig), below the patent's about 600 psig (500-800 psig) but inside its 1100-1500 F (895-938 K, D-004))
    Heat of reaction
    ΔH = -41,764 kJ/kmol at 298.15 K, as written (calculated: ideal-gas formation enthalpies of process/materials.yaml at 298.15 K (83180 - 74534 - 50410 kJ/kmol))
    Catalyst
    none (thermal, homogeneous gas phase)

Sources

What the processes cite for this reaction, each source once: for the reaction itself, its conversion, its heat of reaction or its catalyst. As the processes write them; DOIs, US patent numbers and web addresses are linked.

  1. US 3,291,849 A (Hydrocarbon Research, Inc., 1966): thermal (non-catalytic) toluene hydrodealkylation

    For the reaction · cited by Toluene hydrodealkylation to benzene (100 kt/a, thermal HDA)

  2. US 3,291,849 A (C. C. King, J. F. Campagnolo, L. M. Lehman; Hydrocarbon Research, Inc.), Hydrodealkylation, granted 1966-12-13, detailed description, the paragraph beginning 'The reactor 44 is an internally insulated open chamber': a non-catalytic toluene reactor at about 600 psig, 20-40 s residence and at most 1350 F, controlled so that about 75 % of the toluene in its total feed is converted; read in full text at https://patents.google.com/patent/US3291849 on 2026-11-03 (process/reaction-evidence.yaml O1, D-021). Adopted from the patent's reactor as the design value of R-101: R-101's volume and residence time are not designed to it. The patent's reactor holds its temperature profile with quench gas added at points along the reactor; R-101 is a single adiabatic vessel without intermediate quench, at 3450-3380 kPa(a) (485 psig), below the patent's about 600 psig (500-800 psig) but inside its 1100-1500 F (895-938 K, D-004)

    For the conversion · cited by Toluene hydrodealkylation to benzene (100 kt/a, thermal HDA)

  3. ideal-gas formation enthalpies of process/materials.yaml at 298.15 K (83180 - 74534 - 50410 kJ/kmol)

    For the heat of reaction · cited by Toluene hydrodealkylation to benzene (100 kt/a, thermal HDA)