Automatic Chemisorption Analyzer testing and analysis services are offered to evaluate the binding capability between adsorbates and solid surfaces, as well as to characterize the kinetic behavior of desorption temperature and surface coverage.
TPD Principle
When a solid substance is heated, desorption occurs when adsorbed molecules gain sufficient energy to overcome the energy barrier (typically referred to as desorption activation energy) required for escape. Since the binding capability varies between different adsorbates and the same surface, or between the same adsorbate and different adsorption sites on the surface, the energy required for desorption also differs.
Instrument Model and Technical Parameters
- Instrument Model: Micromeritics Autochem 2910
- Technical Parameters:
- Heating rate: 10~30K/min
- Gas type: Non-corrosive conventional gases
- Gas flow rate: 10–75 ml/min
- Detector: TCD (thermal conductivity detector) or online mass spectrometer
Sample Submission Requirements and Notes
- Sample form: Solid, 200–1000 mg in a plastic centrifuge tube.
- Samples must be free of water and low-molecular-weight organic compounds to avoid testing anomalies.
- Samples must be thermally stable and non-decomposable under testing conditions.
