Hydrocracker simulation

heavy feed + H2 -> lighter products (discrete lumped kinetics)

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Governing equations

The exact equations the solver works for a hydrocracker — the same math shown in the app's "Theory" panel, not a black box.

k_r = k_{0,r}\,e^{-E_{a,r}/RT}

\frac{d\dot n_j}{d\tau} = \sum_r \nu_{r,j}\,k_r\,\dot n_{\mathrm{reactant}(r)}

\tau: reactor space time [s]
k_r: first-order rate constant of lump reaction r [1/s]
\dot n: component molar flow [mol/s]
\nu: stoichiometric coefficient
X: conversion of the cracked (heavy) lumps
r: reaction index

Parameters

reactions [{reactant lump, k0 [1/s], Ea [J/mol], products {lump: nu, h2: -nu}}] (first-order discrete lumping), one of space_time [s] | lhsv [1/h] | volume [m^3], temperature [K], optional hydrogen id (default 'h2'), heat_of_reaction [J/mol H2, - exothermic]

Example flowsheets that use it

Hydrocracker simulation

Governing equations

Parameters

Example flowsheets that use it

Hydrocracking reaction section

Hydrocracking fractionation train

Renewable diesel & SAF: HEFA hydrotreating train

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