The temperature distribution and the residence times in the susceptor were evaluated using COMSOL Multiphysics (version 5.2). The susceptor was modelled using a 2D axisymmetric approximation. Since TEB is highly diluted in H2, a flow of pure H2 was considered in these calculations. The temperature profile inside the susceptor (without flow) was described by a parabolic function, as previously calculated for this reactor by Danielsson . The residence time 𝑡 𝑟𝑒𝑠 at a given point 𝑥 𝑖 was defined using the formula: