Abstract
• M1@Cordierithe structured catalyst for the ODHE process is successfully prepared. • A CeO 2 inter-layer is introduced to improve the M1 catalytic performance without decrease of ethylene selectivity. • M1@CeO 2 @Cordierithe structured catalyst shows an excellent ethylene productivity and long-term stability in ODHE process. The phase-pure M1 MoVNbTeO x catalyst was successfully coated on cordierite monolith by PVP-sol binder solution. In order to improve the activity of structured catalyst, an M1@CeO 2 @Monolith layered structure was further prepared through a two-step procedure: (i) Coating CeO 2 layer on monolith by sol–gel method, then (ii) coating the M1 on CeO 2 @Monolith. The M1@CeO 2 @Monolith structured catalyst exhibited superior catalytic performance and stability for ODHE reaction. At 400 °C, ethane conversion ( X C2H6 ) ∼ 60% and ethylene selectivity ( S C2H4 ) ∼ 85% with a space time yield of ethylene (STY) ∼ 0.9 kg C2H4 /kg cat /h (normalized to M1 ∼ 1.05 kg C2H4 /kg cat /h) have been achieved for the M1@CeO 2 @Cordierite structured catalyst, while the M1@Monolith has only about X C2H6 ∼ 40%, S C2H4 ∼ 92%, and STY ∼ 0.64 kg C2H4 /kg cat /h. In summary, these results inspired the catalyst design for ODHE process, presenting great potential for industry practice.
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