Reversible reaction

C2H4+H2OC2H6O

Direction
Reversible (an equilibrium)
Processes
1
Stated as
Equilibrium
Heat of reaction
ΔH = -45,308 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
C2H4Ethylene74-85-1reactant-1
H2OWater7732-18-5reactant-1
C2H6OEthanol64-17-5product1

In the processes

  • Ethanol by direct hydration of ethylene (100 000 t/a anhydrous, phosphoric acid catalyst)Concept · not reviewed

    HYDC2H4 + H2O ⇌ C2H5OH

    Stated as
    Equilibrium
    Element balance
    Balances in every element
    Heat of reaction
    ΔH = -45,308 kJ/kmol at 298.15 K, as written (calculated: ideal-gas formation enthalpies of materials.yaml (ATcT), 298.15 K)
    Catalyst
    Phosphoric acid on a silica support · active phase H3PO4 · on SiO2
    Operating window
    498.15–553.15 K (225–280 °C), 3,000–10,000 kPa (30–100 bar) (given: US 5349096, Description and claims: 225-280 C for ethylene to ethanol, 3000-10000 kPa for ethylene; acid loading 5-55 % w/w)

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 4003952 (Background: phosphoric acid on celite, 4-5 % of the ethylene converted per pass)

    For the reaction · cited by Ethanol by direct hydration of ethylene (100 000 t/a anhydrous, phosphoric acid catalyst)

  2. US 5349096 (phosphoric acid on silica, 225-280 C, 3-10 MPa, water/ethylene 0.15-0.50 mol)

    For the reaction · cited by Ethanol by direct hydration of ethylene (100 000 t/a anhydrous, phosphoric acid catalyst)

  3. ideal-gas formation enthalpies of materials.yaml (ATcT), 298.15 K

    For the heat of reaction · cited by Ethanol by direct hydration of ethylene (100 000 t/a anhydrous, phosphoric acid catalyst)

  4. US 5349096 (BP Chemicals), olefin hydration process: phosphoric acid on high-porosity silica

    For the catalyst · cited by Ethanol by direct hydration of ethylene (100 000 t/a anhydrous, phosphoric acid catalyst)

  5. US 4003952, Background: phosphoric acid on celite

    For the catalyst · cited by Ethanol by direct hydration of ethylene (100 000 t/a anhydrous, phosphoric acid catalyst)