Irreversible reaction

2CH4+2NH3+3O22CHN+6H2O

Direction
Irreversible
Processes
1
Stated as
Fixed conversion
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
CH4Methane74-82-8reactant-2
NH3Ammonia7664-41-7reactant-2
O2Oxygen7782-44-7reactant-3
CHNHydrogen cyanide74-90-8product2
H2OWater7732-18-5product6

In the processes

  • Solid sodium cyanide from Andrussow HCN (6.25 t/h, 50 kt/a)Concept · not reviewed

    ANDRUSSOWCH4 + NH3 + 3/2 O2 → HCN + 3 H2O

    Scale
    Written at 0.5 times the scale
    Stated as
    Fixed conversion
    Element balance
    Balances in every element
    Conversion
    62.9 % of NH3 (given: US 6,596,251 B2 (Degussa, 2003), Table 2 run 1 (air only, O2/NH3 1.15, CH4/NH3 0.98): HCN yield 62.9 % on NH3 fed (D-004))
    Catalyst
    Platinum-rhodium (90/10) gauze pack · active phase Pt-Rh
    Operating window
    1,223.2–1,473.2 K (950–1,200 °C), 100–200 kPa (1–2 bar) (given: temperature: US 6,596,251 B2 (Degussa, 2003), detailed description: reaction temperature 950-1200 C, the background naming Pt with 10 % Rh gauzes at about 980-1050 C in air operation; pressure: near-atmospheric operation of the converter, ASSUMED (no open source read in this run gives a pressure))
    Poisons
    iron, sulfur compounds

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 6,596,251 B2 (Degussa, 2003), background: overall reaction and its enthalpy (-473.9 kJ)

    For the reaction · cited by Solid sodium cyanide from Andrussow HCN (6.25 t/h, 50 kt/a)

  2. US 6,596,251 B2 (Degussa, 2003), Table 2 run 1 (air only, O2/NH3 1.15, CH4/NH3 0.98): HCN yield 62.9 % on NH3 fed (D-004)

    For the conversion · cited by Solid sodium cyanide from Andrussow HCN (6.25 t/h, 50 kt/a)

  3. US 6,596,251 B2 (Degussa, 2003), background and examples (Pt/Rh10 gauze, 6 layers in the laboratory reactor)

    For the catalyst · cited by Solid sodium cyanide from Andrussow HCN (6.25 t/h, 50 kt/a)

Starter template

A starting template is in the ChemE-as-Code toolkit (Hydrogen cyanide (Andrussow process)): cheme chemistry library hcn_andrussow --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.