The specific surface area it is a physically and chemically important parameter of porous materials. It is most commonly determined by gas sorption isotherms. Two of these – The Langmuir- and BET-isotherms – are evaluated in this exercise.
Inhaltsverzeichnis (Table of Contents)
- Specific Surface Area, Langmuir, BET
- Introduction
- Theoretical background
- Langmuir isotherm
- Specific Surface Area and BET
- Experimental methods and Results
- Langmuir
- Specific Surface Area and BET - "Shale 1"
- Specific Surface Area and BET - "Norit AC"
- Evaluation
- References
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
The report aims to evaluate the specific surface area of porous materials using gas adsorption isotherms, specifically the Langmuir and BET methods. It examines the theoretical background of these methods, highlighting their strengths and limitations. The report also analyzes experimental data obtained from gas adsorption experiments.
- Gas adsorption isotherms and their classification (IUPAC types)
- Langmuir isotherm model and its underlying assumptions
- BET isotherm model and its application to determine specific surface area
- Experimental determination of specific surface area using Langmuir and BET methods
- Evaluation and comparison of the Langmuir and BET methods
Zusammenfassung der Kapitel (Chapter Summaries)
The first chapter introduces the concept of specific surface area and its importance in characterizing porous materials. It explains the different types of gas adsorption isotherms based on the IUPAC classification and the Langmuir isotherm as a model for monolayer adsorption. The chapter also discusses the theoretical background of the Langmuir method and its application in determining specific surface area.
The second chapter focuses on the BET isotherm model, which describes multilayer adsorption. It explains the theoretical basis of the BET method and its ability to determine specific surface area based on multilayer adsorption. The chapter also delves into the experimental determination of specific surface area using the BET method.
The third chapter presents the experimental results obtained from gas adsorption experiments on two porous materials, "Shale 1" and "Norit AC." It compares the results obtained from the Langmuir and BET methods, evaluating the strengths and limitations of each method in determining specific surface area.
Schlüsselwörter (Keywords)
The primary focus of the report is on gas adsorption isotherms, specific surface area, porous materials, Langmuir isotherm, BET isotherm, monolayer adsorption, multilayer adsorption, and experimental methods for surface area determination.
- Citation du texte
- Amalia Aventurin (Auteur), 2013, Specific Surface Area, Langmuir, BET, Munich, GRIN Verlag, https://www.grin.com/document/272602
