1 c3h8 15 o2 3 co 4h2 h298 1426 kjmol eq

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Unformatted text preview: tance (Eq. 1). C3H8 + 1.5 O2 → 3 CO + 4H2 (∆H°298 = -142.6 kJ/mol) (Eq. 1) Such a process may lead to the broadening of the feedstock used in catalytic partial oxidation, being more suitable for refineries where the whole range of inexpensive C1C4 alkanes could be used [12, 24]. Furthermore, natural gas, the main source for 1. Introduction 4 ytrtrghrhrhhrhrhhffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff methane, contains considerable amounts of light paraffins, mainly ethane and propane [11], which are more prone to coking than methane. In the steam reforming of methane these fractions are prereformed, before entering the steam reformer. For the partial oxidation of natural gas this might not be necessary, instead converting all natural gas fraction simultaneously to syngas. This would simplify the process and the reactor design. A basic necessity for this would be the development of a catalyst also suitable for the partial oxidation of light paraffins. As propane is much more prone to coking than methane factors concerning the resistance against coking of the nickel catalysts may be much better studied than using methane. Here, in analogy to the related steam reforming process, especially the influence of the reaction conditions, the nickel dispersion and the basicity of the catalysts are of interest. The influence of the reaction conditions can be practically studied on any catalyst, but for the determination of the influence of the Ni dispersion and the basicity of the catalysts it is necessary to be able to exclude structural differences between the catalysts. In order to fulfill all these requirements and demands Ni/Mg/Al catalysts derived from hydrotalcite-type precursors have been chosen for this project. They are inexpensive basic nickel catalysts and are expected to be active and stable in the partial oxidation of propane, having already proven their activity and stability in the partial oxidation of...
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