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Related Concept Videos

Adsorption of Gases on Solids01:28

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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Efficient CO2 adsorption by deoiled flaxseed hydrochar.

Maede Arefizadeh1, Danial Behvandi1, Shahrokh Shahhosseini2

  • 1School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Narmak, Tehran, 16846, Iran.

Scientific Reports
|November 16, 2024
PubMed
Summary

This study optimized hydrochar from de-oiled flaxseed (FDOP) for CO2 adsorption, achieving a high capacity of 1153.26 mg/g. The cost-effective adsorbent demonstrates excellent recyclability for carbon capture applications.

Keywords:
CO2 adsorptionHydrocharHydrothermal carbonizationRSM

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Chemical Engineering

Background:

  • Waste valorization of de-oiled flaxseed (FDOP) presents a sustainable approach.
  • Hydrothermal carbonization (HTC) is an effective method for producing hydrochar.
  • Efficient CO2 capture is crucial for mitigating climate change.

Purpose of the Study:

  • To optimize the synthesis of hydrochar from FDOP for enhanced CO2 adsorption.
  • To investigate the adsorption capacity, kinetics, and thermodynamics of FDOP-derived hydrochar.
  • To evaluate the cost-effectiveness and recyclability of the hydrochar for carbon capture.

Main Methods:

  • Hydrothermal carbonization (HTC) was used to produce hydrochar from FDOP.
  • Response Surface Methodology (RSM) was employed for process optimization.
  • CO2 adsorption experiments were conducted under various conditions.
  • Kinetic and thermodynamic analyses were performed to understand adsorption mechanisms.

Main Results:

  • Optimal conditions yielded a CO2 adsorption capacity of 1153.26 mg/g.
  • The adsorption process followed both physical and chemical adsorption mechanisms.
  • Thermodynamic analysis indicated exothermic adsorption behavior.
  • The hydrochar exhibited excellent recyclability with minimal capacity loss after 10 cycles.

Conclusions:

  • FDOP-derived hydrochar is a highly efficient and low-cost adsorbent for CO2 capture.
  • The optimized hydrochar offers significant potential for industrial carbon capture and waste management.
  • This research provides a sustainable pathway for utilizing agricultural waste in environmental applications.