The determination of the simulation input parameters, namely the pump pulse energy, pump and probe spot size, sample absorbance, pellet thickness, sample density, zeolite specific heat capacity (CP) and thermal conductivity (κ), pump beam quality factor and reflection coefficient, are discussed in ESI Section 9. The effect of the zeolite heat capacity was found to be particularly significant in determining the magnitude of the temperature jump achieved and was modelled using a second-order polynomial derived from fitting experimental data from Lu et al. The effect of pump light scattering from the pellet, heat transfer through convection or radiation and the potential temperature-dependence of parameters other than Cp over the course of the simulation run were not included due to difficulties in quantifying their effects. The effects of asymmetric beam profiles, pump-probe alignment, and the variation of the probed laser spot within the base temperature profile of the zeolite pellet are assumed negligible. These factors are examined in more detail in the ESI, Section 10. Their net effect is that simulation ΔT values are likely to be slightly larger than those observed experimentally, as they represent a more 'ideal' set of conditions.