2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/110021We prove some existence and uniqueness results and some qualitative properties for the solution of a system modelling the catalytic conversion in a cylinder. This model couples parabolic partial differential equations posed in a cylindrical domain and on its boundary.Analysis of PDEs35M10, 35K65, 35Q80text