Modeling the influence of mineral rocks, active in different hot gas conditioning systems and technologies, on the production of light α-olefins

摘要

A mechanistic reaction model of the pyrolysis of vaporized n-heptane in the presence of steam(P_H_2O ≈18-32 kPa)is developed based on overall first-order decomposition kinetics, which satisfactorily describes the experimental data. The mechanistic model predicted that calcined, naturally occurring and readily available mineral rocks, Swedish quarried cal- cium oxide(quicklime)and Norwegian(Norsh Hydro)magnesium oxide(dolomitic magnesium oxide)applied as the catalytic materials increase the conversion of the vaporized feedstock(P_n-C7H_16 = 2.9-4.7 kPa)without changing the distrib- ution of lightα-olefins(i.e., C_2H_4, C_3+, C_4H_8), compared to pyrolysis in an empty reactor viz. Thermal steam-cracking.