3.3 Performances parameters
Performances parameters and the calculation equations used in this
modeling study were listed in Table 2S (see Supporting Information).
Typically, C5+ space-time yield
(\(\text{STY}_{C_{5+}}\)) in FTS is a key factor, because it is a
combination of catalyst apparent activity and selectivity. Therefore, in
the following discussion, \(\text{STY}_{C_{5+}}\) is used as the
evaluation criteria for catalyst reaction-diffusion
performances.
3.4 Method of solution
The second-order ordinary differential equation, Eq. (5), was first
written as two first-order ordinary differential equations, for each
component. The obtained system of first-order ordinary differential
equations with the boundary conditions specified at two points was then
solved by finite different method. The integral terms in performance
parameters listed in Table 2S were calculated using trapezoidal rule
based on the concentration profiles calculated within the pellet.