<p>The present scenario focuses on the enhanced heat transfer characteristic which favors in design and longevity of the product in industries, bio-medical devices, preventing overheating in electronic devices, etc. Covering all the above aspects, the present study analyses the free-convection of micropolar nanofluid with the assumption of the Cattaneo–Christov heat flux model past an extending surface packing with porous material. The role of inertial drag is obtained from the inclusion of Darcy–Forchheimer model. The flow characteristic imposed with thermal and solutal buoyancy and the heat transport equation merged with the impact of Brownian and thermophoresis whereas the solutal transfer model is enriched for the effect of chemical reaction. The proposed mathematical model framed as per the assumptions is transformed into dimensionless by superimposing several similar rules. Based on the complexity of the nonlinearity of the models, the set of equations is handled numerically utilizing traditional numerical technique i.e. shooting adopted by the Runge–Kutta method. For computational purposes, the bvp4c built-in function in MATLAB is utilized to get the results of all the profiles. The behavior of each of the factors is scrutinized through graphs and deliberated briefly. Moreover, the important characteristic of several factors are depicted as; the axial fluid velocity retards for the inclusion of inertial drag but reverse impact is rendered in angular velocity. The combined approach of thermophoresis and the Brownian motion enrich the heat transport phenomenon and the behaviour of the fluid concentration retards for the enhanced Brownian motion.</p>