Evaluating Methane Adsorption Characteristics of Coal-Like Materials

Area of Science:

• Geochemistry
• Materials Science
• Chemical Engineering

Background:

• Investigating methane adsorption in coal seams is crucial for resource extraction and safety.
• Solid-gas coupling experiments require suitable surrogate materials for coal.

Purpose of the Study:

• To evaluate activated alumina, silica gel, and molecular sieves as potential methane adsorption materials.
• To compare their adsorption characteristics with actual coal samples under various conditions.

Main Methods:

• Methane adsorption experiments were conducted using a WY-98A instrument.
• Tests varied temperature, particle size, and moisture content.
• Adsorption data was analyzed against the Langmuir model and coal sample behavior.

Main Results:

• Molecular sieves did not fit the Langmuir model and were unsuitable.
• Activated alumina and silica gel exhibited similar adsorption trends to coal.
• Silica gel's methane adsorption coefficient closely matched that of coal samples.

Conclusions:

• Silica gel is the preferred material for simulating coal in methane adsorption studies.
• Findings provide an experimental basis for selecting methane-adsorbing materials for physical simulation.
• This research supports the development of solid-gas coupling experiments.