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<p>The petroleum industry is challenged by high energy consumption in large-scale hydrogen sulfide (H<sub>2</sub>S) removal from crude oil. This study explores crude oil stripping of H<sub>2</sub>S in straight and serpentine microchannels, providing mass transfer correlations for the process. The influence of various operating parameters such as crude oil temperature (T<sub>oil</sub>=20–40&#xa0;°C), crude oil flow rate (Q<sub>oil</sub>=50–120 mL/min) and natural gas flow rate (Q<sub>gas</sub>=200–1200 mL/min) on mass transfer characteristics of H<sub>2</sub>S, pressure drop and specific energy consumption (S.E.C) are investigated. The results show that increasing T<sub>oil</sub> and Q<sub>gas</sub> and reduction in Q<sub>oil</sub> is conducive to enhancing liquid-side mass transfer coefficient (K<sub>L</sub>a) and stripping efficiency, with maximum values of 1.4 (1/s) and 78.6%, respectively. The mass transfer characteristics and pressure drop in the serpentine microchannel are 10–25% and 2.5–10.4% more than the straight one, respectively. The efficient ranges of operating parameters (Q<sub>oil</sub>=90–120 mL/min, Q<sub>gas</sub>=200–450 mL/min and T<sub>oil</sub>=20–40&#xa0;°C) are determined to minimize S.E.C and obtain the highest performance ratio (η = 1.18) of the serpentine microchannel. Correlations using the experimental results are obtained to find Sherwood number (Sh<sub>L</sub>) and K<sub>L</sub>a. The average absolute deviation (AAD %) between predicted values and experimental data is under 6.6% for both straight and serpentine microchannels. This study advances the development of these T-junction microchannels for crude oil stripping from H<sub>2</sub>S, considering specific energy consumption and operational constraints.</p>

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H2S removal from crude oil flows and gas-liquid mass transfer characteristics in T-junction straight and serpentine microchannels

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月11日

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  • Mohammad Hassan Almasvandi,
  • Masoud Rahimi,
  • Neda Azimi

摘要

The petroleum industry is challenged by high energy consumption in large-scale hydrogen sulfide (H2S) removal from crude oil. This study explores crude oil stripping of H2S in straight and serpentine microchannels, providing mass transfer correlations for the process. The influence of various operating parameters such as crude oil temperature (Toil=20–40 °C), crude oil flow rate (Qoil=50–120 mL/min) and natural gas flow rate (Qgas=200–1200 mL/min) on mass transfer characteristics of H2S, pressure drop and specific energy consumption (S.E.C) are investigated. The results show that increasing Toil and Qgas and reduction in Qoil is conducive to enhancing liquid-side mass transfer coefficient (KLa) and stripping efficiency, with maximum values of 1.4 (1/s) and 78.6%, respectively. The mass transfer characteristics and pressure drop in the serpentine microchannel are 10–25% and 2.5–10.4% more than the straight one, respectively. The efficient ranges of operating parameters (Qoil=90–120 mL/min, Qgas=200–450 mL/min and Toil=20–40 °C) are determined to minimize S.E.C and obtain the highest performance ratio (η = 1.18) of the serpentine microchannel. Correlations using the experimental results are obtained to find Sherwood number (ShL) and KLa. The average absolute deviation (AAD %) between predicted values and experimental data is under 6.6% for both straight and serpentine microchannels. This study advances the development of these T-junction microchannels for crude oil stripping from H2S, considering specific energy consumption and operational constraints.