Fig. 2 shows the heptane conversion for various feed temperatures and S/C feed ratios along the dimensionless reactor length. In the horizontal direction, the figures show the effect of different feed temperatures (300 °C, 400 °C, 500 °C) at a constant S/C feed ratio and in the vertical direction the figures show the influence of different S/C feed ratios (S/C = 1.0, 3.0, 5.0) at a constant feed temperature.