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Related Concept Videos

Carbon Dioxide Transport in the Blood01:19

Carbon Dioxide Transport in the Blood

Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
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Adsorption of Gases on Solids

Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...
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Adsorption Isotherms II

Brunauer, Emmett, and Teller (BET) introduced a theory in 1938 that modified Langmuir's assumptions to explain multilayer physical adsorption. This theory is applicable to Type II isotherms and provides a more realistic picture of adsorption processes. The BET theory assumes a uniform solid surface with localized adsorption sites, where adsorption at one site doesn't affect adsorption at neighboring sites. This theory also allows for the possibility of additional molecules being adsorbed on top...
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Related Experiment Video

Updated: May 28, 2026

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
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In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

CO2 adsorption by activated templated carbons.

Marta Sevilla1, Antonio B Fuertes1

  • 1Instituto Nacional del Carbón (CSIC), P.O. Box 73, 33080 Oviedo, Spain.

Journal of Colloid and Interface Science
|October 18, 2011
PubMed
Summary

Highly porous carbons were synthesized for carbon dioxide (CO2) capture. The resulting materials demonstrated efficient CO2 uptake, primarily dependent on narrow micropores, and good regeneration capabilities.

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Developing efficient sorbent materials is crucial for effective carbon dioxide (CO2) capture.
  • Ordered mesoporous silicas like SBA-15 and KIT-6 serve as versatile hard templates for creating porous carbon structures.

Purpose of the Study:

  • To synthesize highly porous carbons using templated mesoporous carbons.
  • To investigate the CO2 capture performance of these activated carbons.
  • To understand the relationship between pore structure and CO2 adsorption capacity.

Main Methods:

  • Chemical activation of mesoporous carbons (CMK-8) using potassium hydroxide (KOH) at temperatures ranging from 600-800°C.
  • Textural characterization to analyze surface area, pore volume, and pore size distribution.

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A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture
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  • Evaluation of CO2 uptake capacity at 25°C and assessment of CO2/N2 selectivity.

    • Main Results:

    • Activated carbons exhibited dual porosity, combining mesopores from the template and newly formed micropores.
    • Surface area increased from 1020 m²g⁻¹ to a maximum of 2660 m²g⁻¹.
    • CO2 uptake capacity was approximately 3.2 mmol CO2g⁻¹, correlating with the presence of narrow micropores (<1 nm) rather than overall surface area or pore volume.

    Conclusions:

    • The synthesized porous carbons are effective for CO2 capture, showing high adsorption rates and good CO2/N2 selectivity.
    • The CO2 capture efficiency is primarily governed by the abundance of narrow micropores.
    • These materials offer potential for practical CO2 separation applications due to their performance and regenerability.