Irreversible reaction

Partial oxidation of ethylene to ethylene oxide (silver catalyst)

2C2H4+O22C2H4O

Direction
Irreversible
Processes
1
Stated as
Fixed conversion
Heat of reaction
ΔH = -210,000 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-2
O2Oxygen7782-44-7reactant-1
C2H4OEthylene oxide75-21-8product2

In the processes

  • Ethylene glycol by ethylene oxide hydration (glycols-only EO/EG plant, 1200 t/d MEG)Concept · not reviewed

    EOX · Partial oxidation of ethylene to ethylene oxide (silver catalyst)C2H4 + 0.5 O2 → EO

    Scale
    Written at 0.5 times the scale
    Stated as
    Fixed conversion
    Element balance
    Balances in every element
    Conversion
    7.65 % of C2H4 (assumed: D-004: fraction of the inlet C2H4 converted to EO = per-pass conversion 0.09 x EO selectivity 0.85 (BREF LVOC 2017 7.2.1.1.1: 8-10 %, 75-90 %))
    Heat of reaction
    ΔH = -105,000 kJ/kmol at 298.15 K, as written (given: BREF LVOC 2017 (JRC109279), section 7.2.1.1.1, p. 363)
    Catalyst
    silver on alpha-alumina, promoted, with an organochlorine moderator in the feed gas

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. BREF LVOC 2017 (JRC109279), sections 7.2.1.1.1 and 7.2.2.1, pp. 363-366

    For the reaction · cited by Ethylene glycol by ethylene oxide hydration (glycols-only EO/EG plant, 1200 t/d MEG)

  2. D-004: fraction of the inlet C2H4 converted to EO = per-pass conversion 0.09 x EO selectivity 0.85 (BREF LVOC 2017 7.2.1.1.1: 8-10 %, 75-90 %)

    For the conversion · cited by Ethylene glycol by ethylene oxide hydration (glycols-only EO/EG plant, 1200 t/d MEG)

  3. BREF LVOC 2017 (JRC109279), section 7.2.1.1.1, p. 363

    For the heat of reaction · cited by Ethylene glycol by ethylene oxide hydration (glycols-only EO/EG plant, 1200 t/d MEG)

Starter template

A starting template is in the ChemE-as-Code toolkit (Ethylene oxide (direct oxidation)): cheme chemistry library ethylene_oxide --add

Templates bring the stoichiometry, the components and typical catalysts; most give no conversion or kinetics, and their sources are general references, not this reaction's processes.