Snapshots of the adsorbate layer (lattice state) from a kinetic Monte Carlo simulation of the lattice-Brusselator system. The simulation was performed using the software package Zacros (v3.00dev, commit hash a620e1a56ec45622488646bf85e9bf18d06753b8), on 625 MPI processes on the Thomas@UCL cluster. The postprocessing and plotting script "plot_contours_v7_TwoPanels.py" was used to generate the snapshots on 24 to 29-Aug-2022. The dataset is provided as a compressed rar file containing png image files.