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Shrinking-Core Model Integrating to the Fluid-Dynamic Analysis of Fixed-Bed Adsorption Towers for H 2 S Removal from Natural Gas

Author

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  • Bryan Carrasco

    (Grupo de Investigación Aplicada en Materiales y Procesos (GIAMP), School of Chemical Sciences and Engineering, Yachay Tech University, Hda. San José s/n y Proyecto Yachay, 100119 Urcuquí, Ecuador)

  • Edward Ávila

    (Grupo de Investigación Aplicada en Materiales y Procesos (GIAMP), School of Chemical Sciences and Engineering, Yachay Tech University, Hda. San José s/n y Proyecto Yachay, 100119 Urcuquí, Ecuador)

  • Alfredo Viloria

    (Grupo de Investigación Aplicada en Materiales y Procesos (GIAMP), School of Chemical Sciences and Engineering, Yachay Tech University, Hda. San José s/n y Proyecto Yachay, 100119 Urcuquí, Ecuador)

  • Marvin Ricaurte

    (Grupo de Investigación Aplicada en Materiales y Procesos (GIAMP), School of Chemical Sciences and Engineering, Yachay Tech University, Hda. San José s/n y Proyecto Yachay, 100119 Urcuquí, Ecuador)

Abstract

Natural gas sweetening is an essential process within hydrocarbon processing operations, enabling compliance with product quality specifications, avoiding corrosion problems, and enabling environmental care. This process aims to remove hydrogen sulfide (H 2 S), carbon dioxide, or both contaminants. It can be carried out in fixed-bed adsorption towers, where iron oxide-based solid sorbent reacts with the H 2 S to produce iron sulfides. This study is set out to develop a fluid-dynamic model that allows calculating the pressure drop in the H 2 S adsorption towers with the novelty to integrate reactivity aspects, through an iron sulfide layer formation on the solid particles’ external skin. As a result of the layer formation, changes in the particle diameter and the bed void fraction of the solid sorbent tend to increase the pressure drop. The shrinking-core model and the H 2 S adsorption front variation in time support the model development. Experimental data on pressure drop at the laboratory scale and industrial scale allowed validating the proposed model. Moreover, the model estimates the bed replacement frequency, i.e., the time required to saturate the fixed bed, requiring its replacement or regeneration. The model can be used to design and formulate new solid sorbents, analyze adsorption towers already installed, and help maintenance-planning operations.

Suggested Citation

  • Bryan Carrasco & Edward Ávila & Alfredo Viloria & Marvin Ricaurte, 2021. "Shrinking-Core Model Integrating to the Fluid-Dynamic Analysis of Fixed-Bed Adsorption Towers for H 2 S Removal from Natural Gas," Energies, MDPI, vol. 14(17), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:17:p:5576-:d:630079
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    References listed on IDEAS

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    1. Papadias, Dionissios D. & Ahmed, Shabbir & Kumar, Romesh, 2012. "Fuel quality issues with biogas energy – An economic analysis for a stationary fuel cell system," Energy, Elsevier, vol. 44(1), pages 257-277.
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    Cited by:

    1. Marvin Ricaurte & Paola E. Ordóñez & Carlos Navas-Cárdenas & Miguel A. Meneses & Juan P. Tafur & Alfredo Viloria, 2022. "Industrial Processes Online Teaching: A Good Practice for Undergraduate Engineering Students in Times of COVID-19," Sustainability, MDPI, vol. 14(8), pages 1-15, April.
    2. Willam Trujillo & Joseph Cobo & Dayanna Vera-Cedeño & Alex Palma-Cando & Jorge Toro-Álava & Alfredo Viloria & Marvin Ricaurte, 2022. "Magnetic Separation and Enrichment of Fe–Ti Oxides from Iron Titaniferous Beach Sands: Process Design Applied to Coastal Ecuador," Resources, MDPI, vol. 11(12), pages 1-14, December.

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