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<p>Hydrogen is a promising sustainable energy carrier due to its eco-friendly features. Approximately 96% of global hydrogen production is produced using carbon-based methods, such as natural gas (NG) steam reforming, which releases significant amounts of CO<sub>2</sub> as a byproduct. To produce H<sub>2</sub> more efficiently, a membrane reactor (MR) is introduced, and while some attempts have been made to improve the hydrogen yield in MR coupled with membranes, a sorption-enhanced membrane reactor (SEMR) has been proposed as a next-generation process for simultaneous H<sub>2</sub> production and CO<sub>2</sub> capture. A two-dimensional (2D) axisymmetric computational fluid dynamics (CFD) model is developed for a hydrogen-permeable membrane reactor that employs a Pd-Ru membrane with a Ni <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(/{\text{MgAl}}_{2}{\text{O}}_{3}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">/</mo> <msub> <mtext>MgAl</mtext> <mn>2</mn> </msub> <msub> <mtext>O</mtext> <mn>3</mn> </msub> </mrow> </math></EquationSource> </InlineEquation> catalyst and calcium oxide (CaO) as a CO<sub>2</sub> adsorbent to produce high-purity hydrogen utilizing actual (Amara Field) natural gas steam reforming. This work simulates a model for NG steam reforming using real composition data under varying heating gas temperatures (500–800&#xa0;K). A comparison is made for the performance of the SEMR to that of a conventional membrane reactor (MR). At 800&#xa0;K and a pressure difference of 1 bar, SEMR achieves a 3.3% higher H₂ concentration, a 2.4% higher CH₄ conversion, and a 23.9% lower CO₂ concentration compared to MR. These findings demonstrate the potential of SEMR to contribute meaningfully to cleaner and more efficient hydrogen production technologies.</p>

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Enhancing Hydrogen Recovery in Sorption Enhancement Membrane Reactors (SEMR): A CFD Study

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Alaa H. Theban,
  • Tahseen A. Al-Hattab

摘要

Hydrogen is a promising sustainable energy carrier due to its eco-friendly features. Approximately 96% of global hydrogen production is produced using carbon-based methods, such as natural gas (NG) steam reforming, which releases significant amounts of CO2 as a byproduct. To produce H2 more efficiently, a membrane reactor (MR) is introduced, and while some attempts have been made to improve the hydrogen yield in MR coupled with membranes, a sorption-enhanced membrane reactor (SEMR) has been proposed as a next-generation process for simultaneous H2 production and CO2 capture. A two-dimensional (2D) axisymmetric computational fluid dynamics (CFD) model is developed for a hydrogen-permeable membrane reactor that employs a Pd-Ru membrane with a Ni \(/{\text{MgAl}}_{2}{\text{O}}_{3}\) / MgAl 2 O 3 catalyst and calcium oxide (CaO) as a CO2 adsorbent to produce high-purity hydrogen utilizing actual (Amara Field) natural gas steam reforming. This work simulates a model for NG steam reforming using real composition data under varying heating gas temperatures (500–800 K). A comparison is made for the performance of the SEMR to that of a conventional membrane reactor (MR). At 800 K and a pressure difference of 1 bar, SEMR achieves a 3.3% higher H₂ concentration, a 2.4% higher CH₄ conversion, and a 23.9% lower CO₂ concentration compared to MR. These findings demonstrate the potential of SEMR to contribute meaningfully to cleaner and more efficient hydrogen production technologies.