Selective Oxidation of Light Hydrocarbons Using Lattice Oxygen Instead of Molecular Oxygen

Abstract

Abstract: In this paper, selective oxidation of n-butane to maleic anhydride (MA) and partial
oxidation of methane to synthesis gas with lattice oxygen instead of molecular oxygen are
investigated. For the oxidation of butane to MA in the absence of molecular oxygen, the Ce
-Fe promoted VPO catalyst has more available lattice oxygen and provides higher conversion
and selectivity than that of the unpromoted one. It is supposed that the introduction of
Ce-Fe complex oxides improves redox performance of VPO catalyst and increases the activity
of lattice oxygen.For partial oxidation of methane to synthesis gas over LaFeO3 and
La0.8Sr0.2FeO3 oxides, the reaction with flow switched between 11% O2-Ar and 11% CH4-He at
900℃ was carried out. The results show that methane can be oxidized to CO and H2 with
selectivity over 93% by the lattice oxygen of the catalyst in an appropriate reaction
condition, while the lost lattice oxygen can be supplemented by air re-oxidation. It is
viable for the lattice oxygen of the LaFeO3 and La0.8Sr0.2FeO3 catalyst instead of
molecular oxygen to react with methane to synthesis gas in the redox mode.

Key words: selective oxidation, lattice oxygen, n-butane, maleic anhydride, Ce-Fe promoted VPO catalysts, methane

摘要： In this paper, selective oxidation of n-butane to maleic anhydride (MA) and partial
oxidation of methane to synthesis gas with lattice oxygen instead of molecular oxygen are
investigated. For the oxidation of butane to MA in the absence of molecular oxygen, the Ce
-Fe promoted VPO catalyst has more available lattice oxygen and provides higher conversion
and selectivity than that of the unpromoted one. It is supposed that the introduction of
Ce-Fe complex oxides improves redox performance of VPO catalyst and increases the activity
of lattice oxygen.For partial oxidation of methane to synthesis gas over LaFeO3 and
La0.8Sr0.2FeO3 oxides, the reaction with flow switched between 11% O2-Ar and 11% CH4-He at
900℃ was carried out. The results show that methane can be oxidized to CO and H2 with
selectivity over 93% by the lattice oxygen of the catalyst in an appropriate reaction
condition, while the lost lattice oxygen can be supplemented by air re-oxidation. It is
viable for the lattice oxygen of the LaFeO3 and La0.8Sr0.2FeO3 catalyst instead of
molecular oxygen to react with methane to synthesis gas in the redox mode.

关键词: selective oxidation;lattice oxygen;n-butane;maleic anhydride;Ce-Fe promoted VPO catalysts;methane;synthesis gas;La1-xSrxFeO3 perovskite catalysts , La1-xSrxFeO3 perovskite catalysts

SHEN Shikong, LI Ranjia, ZHOU Jiping, YU Changchun. Selective Oxidation of Light Hydrocarbons Using Lattice Oxygen Instead of Molecular Oxygen[J]. .

沈师孔, 李然家, 周吉萍, 余长春. 晶格氧用于轻烃的选择氧化[J]. CIESC Journal.

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