Hydrogen sulfide removal from natural gas using membrane technology: a review

Ma, Yulei; Guo, Hongfang; Selyanchyn, Roman; Wang, Bangda; Deng, Liyuan; Dai, Zhongde; Jiang, Xia

doi:10.1039/d1ta04693d

Cited by 57 publications

(27 citation statements)

References 211 publications

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“…1 It plays a pivotal role in the global energy transition due to its abundant reserves, wide distribution, low pollution levels, and high calorific value. 2 Nevertheless, it is important to note that natural gas comprises not only CH 4 but also carbon dioxide (CO 2 ), hydrogen sulfide (H 2 S), N 2, and other impurities. Acidic impurities (e.g., H 2 S and CO 2 ) in natural gas not only reduce the calorific value but also cause potential pipeline corrosion.…”

Section: Introductionmentioning

confidence: 99%

“…Natural gas is a viable alternative to traditional fossil fuels as an acceptable energy source in transition to clean energy systems and economies . It plays a pivotal role in the global energy transition due to its abundant reserves, wide distribution, low pollution levels, and high calorific value . Nevertheless, it is important to note that natural gas comprises not only CH 4 but also carbon dioxide (CO 2 ), hydrogen sulfide (H 2 S), N 2, and other impurities.…”

Section: Introductionmentioning

confidence: 99%

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Combining Interpretable Machine Learning and Molecular Simulation to Advance the Discovery of COF-Based Membranes for Acid Gas Separation

Xin,

Feng,

Cheng

et al. 2024

Ind. Eng. Chem. Res.

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Membrane technology can effectively remove acidic gases (H 2 S and CO 2 ) from natural gas. Covalent organic frames (COFs) have been widely used as membrane materials due to their large pore size and pure organic properties. This work combines machine learning (ML) and molecular simulation (MS) to develop a method for rapidly screening and discovering high-performance COF-based membranes. The ML model is first trained on MS data, using the structural and chemical features obtained from 20 calculations as inputs. Characteristic contributions were obtained through interpretable analytical models, and nearly 70,000 COFs were quickly screened. Finally, the top 10 high-performance COFs were selected by MS under the mixed gas condition, and the properties of the mixed matrix membranes (MMMs) obtained by combining them with six polymers were analyzed. The results show that the highest acid gas permeability of COF-based membranes reaches 8 × 10 5 Barrer, and the void fraction is the key factor determining the separation performance. The top COFs serve as effective fillers to enhance the performance of polymer membranes, which surpass the capabilities of existing MOF fillers. This paper provides an efficient and rapid method for the discovery of COF-based membranes for natural gas deacidification.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combining Interpretable Machine Learning and Molecular Simulation to Advance the Discovery of COF-Based Membranes for Acid Gas Separation

Xin,

Feng,

Cheng

et al. 2024

Ind. Eng. Chem. Res.

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“…Moreover, H 2 S is a highly poisonous and perilous gas that threaten human health even at ultra-low concentrations [5,6]. Hence, there are some regulations were issued to restrict H 2 S concentrations in natural gas below 4ppm to prevent corrosion and touch the product gas speci cation [7]. In order to remove acidic gases, sweetening process is carried out in gas treatment plants.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Natural Gas Sweetening with Ultralow H2S Concentration via Polycarbonate-Silica Mixed Matrix Membranes

Sadeghi,

Hassanajili

2024

Korean J. Chem. Eng.

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Mixed matrix membranes (MMMs) are brought up as prospecting media to sweeten natural gas in recent decades. But the majority of experiments have conducted on CO 2 /CH 4 gas pair separation and, H 2 S removal from CH 4 through MMMs has been paid less consideration. Thereupon, polycarbonate (PC) permeability and permselectivity as a cheap and abundant polymer and two PC-based MMMs were investigated under various operational conditions for this gas couple. The in uence of operational parameters including transmembrane pressure, feed temperature, H 2 S inlet concentration and physical aging on the permeability of mixed gas and selectivity of the H 2 S/CH 4 pair were assessed. It was observed that addition of silica nano particles causes more H 2 S permeability and selectivity. As a result, it can be used for methane upgradation. Membranes fabricated of silica modi ed by PDMS showed the highest permeability of H 2 S and also the superior selectivity of H 2 S/CH 4 . Therefore, it could be possibly applied to mitigation of H 2 S concentration in the outlet gas stream. Additionally, the two fabricated MMMs demonstrated H 2 S transport in a facilitative manner.

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“…Another strategy consists in oxidizing sulfur from hydrogen sulfide to higher oxidation states (4+ or 6+) and recovering it as sulfuric acid or sulfites, but mostly as sulfuric acid and sulfate [ 16 , 17 , 18 , 19 ]. Biological degradation can also be an economical and effective means of hydrogen sulfide removal [ 20 ], while membrane or hybrid processes involving membranes have become more and more popular [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Sulphide Sequestration with Metallic Ions in Acidic Media Based on Chitosan/sEPDM/Polypropylene Composites Hollow Fiber Membranes System

et al. 2023

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This paper presents the preparation and characterization of composite membranes based on chitosan (Chi), sulfonated ethylene–propylene–diene terpolymer (sEPDM), and polypropylene (PPy), and designed to capture hydrogen sulfide. The Chi/sEPDM/PPy composite membranes were prepared through controlled evaporation of a toluene dispersion layer of Chi:sEPDM 1;1, w/w, deposited by immersion and under a slight vacuum (100 mmHg) on a PPy hollow fiber support. The composite membranes were characterized morphologically, structurally, and thermally, but also from the point of view of their performance in the process of hydrogen sulfide sequestration in an acidic media solution with metallic ion content (Cu2+, Cd2+, Pb2+, and/or Zn2+). The operational parameters of the pertraction were the pH, pM, matrix gas flow rate, and composition. The results of pertraction from synthetic gases mixture (nitrogen, methane, carbon dioxide) indicated an efficient removal of hydrogen sulfide through the prepared composite membranes, as well as its immobilization as sulfides. The sequestration and the recuperative separation, as sulfides from an acid medium, of the hydrogen sulfide reached up to 96%, decreasing in the order: CuS > PbS > CdS > ZnS.

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Hydrogen sulfide removal from natural gas using membrane technology: a review

Abstract: Natural gas, having a significantly lower CO2 emission factor than oil and coal when combusted, is accepted as an important transition fuel towards the carbon net-zero society. To meet the...

Cited by 57 publications

References 211 publications

Combining Interpretable Machine Learning and Molecular Simulation to Advance the Discovery of COF-Based Membranes for Acid Gas Separation

Combining Interpretable Machine Learning and Molecular Simulation to Advance the Discovery of COF-Based Membranes for Acid Gas Separation

Enhanced Natural Gas Sweetening with Ultralow H2S Concentration via Polycarbonate-Silica Mixed Matrix Membranes

Hydrogen Sulphide Sequestration with Metallic Ions in Acidic Media Based on Chitosan/sEPDM/Polypropylene Composites Hollow Fiber Membranes System

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