Enhancement of acetylene and ethylene yields in partially decoupled oxidation of ethane by changing the composition of heat carrier

doi:10.1016/j.cjche.2021.07.012

Abstract

Abstract: In our previous work, a partially decoupled process (PDP) was proposed for efficient conversion of ethane to increase the ethylene yield and a new structural reactor called forward-impinging-back reactor (FIB) was proposed for scale-up. In this work, the influence of changing the composition and temperature of the heat carrier was investigated by simulations with detailed chemistry to further increase of the C₂ (C₂H₂ + C₂H₄) yield in the PDP of ethane. At ideal mixing conditions, the C₂ yield is 75.3% without steam addition and it is 82.9% at steam addition ratio of β=1.4. In comparison, the C₂ yield in an FIB reactor is 62.4% without steam addition and it increases to 78.5% with steam addition (β=1.4). The requirement of high mixing efficiency is diminished by steam addition, which is favorable for reactor scale-up.

Key words: Partially decoupled process (PDP), Ethane, Computational fluid dynamics (CFD), Steam addition

摘要： In our previous work, a partially decoupled process (PDP) was proposed for efficient conversion of ethane to increase the ethylene yield and a new structural reactor called forward-impinging-back reactor (FIB) was proposed for scale-up. In this work, the influence of changing the composition and temperature of the heat carrier was investigated by simulations with detailed chemistry to further increase of the C₂ (C₂H₂ + C₂H₄) yield in the PDP of ethane. At ideal mixing conditions, the C₂ yield is 75.3% without steam addition and it is 82.9% at steam addition ratio of β=1.4. In comparison, the C₂ yield in an FIB reactor is 62.4% without steam addition and it increases to 78.5% with steam addition (β=1.4). The requirement of high mixing efficiency is diminished by steam addition, which is favorable for reactor scale-up.

关键词: Partially decoupled process (PDP), Ethane, Computational fluid dynamics (CFD), Steam addition

Tianpeng LiZhou, Jiajia Luo, Tiefeng Wang. Enhancement of acetylene and ethylene yields in partially decoupled oxidation of ethane by changing the composition of heat carrier[J]. Chinese Journal of Chemical Engineering, 2022, 47(7): 71-78.

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