Instrument Introduction:

Autosorb-iQ-C is the world's first fully automated physical/chemical adsorption analyzer (i.e. catalyst analysis system) that combines dynamic and static analysis. It combines with a high-sensitivity thermal conductivity detector (TCD) and can perform fully automatic dynamic or static chemical adsorption, surface area and porosity analysis. It is the only instrument that can achieve in-situ vacuum degassing and perform full chemical adsorption analysis.

Technical parameters:

This analyzer is a fully automated system capable of vacuum volume measurement, gas physics and chemical adsorption measurement. It has a high gas flow rate, low cost, and can independently degas two other samples while measuring one sample. This system can be used to comprehensively determine the characteristics of substances with micropores, such as zeolites, activated carbon, etc. The system generates the required adsorption and desorption data to determine and provide all surface areas and relevant parameters as listed in the following entries. This system can prepare samples for chemical adsorption in situ and automatically perform chemical adsorption measurements to express the catalytic properties of the samples.
1. Isothermal line: Users can select the number of data points at a specified target pressure.
2. BET specific surface area: single point, multi-point, slope, intercept, constant "C", correlation coefficient.
Langmuir surface area: multi-point, slope, intercept, correlation coefficient.
3. BJH pore size distribution: volume, area, adsorption, desorption, accumulation, derivation (linearization and logarithmic), interpolation.
4. Dollymore Hale pore size distribution: volume, area, adsorption, desorption, accumulation, derivation: (linearized and logarithmic).
5. Dubinin Radushkevich micropore area: slope, intercept, correlation coefficient, average pore size, micropore volume, average adsorption energy.
6. Total pore volume: selectable P/P0 selected by the user
7. Average pore size: radius, diameter.
8. Statistical wall thickness (t-curve): de Boer, Halsey or carbon black model
9. T-method: microporous surface area, mesoporous surface area, microporous volume, correlation coefficient.
10. Pore size distribution: MP, HK, SF, DA, density function theory (NLDFT)
11. Fractal dimension: Neimark Kiselev (NK), Frenkel Halsey Hill (FHH)
12. Chemical adsorption isotherm curves: synthesized (first), weakly adsorbed (reproducible), and strongly adsorbed (differential) isotherm curves and profiles.
13. Extrapolation of single-layer coverage: Langmuir, Tempkin, Freundlich, classification.
14. For active (metal) surfaces, users can choose between chemical stoichiometry and metal surfaces.
15. Metal dispersion (percentage).
16. Average grain size (for granular materials)
17. Adsorption heat (overall and individual)
18. TPD/TPR/TPO (optional, connected to mass spectrometry or TCD)

Main features:

-Flow dynamic program heating, TPD/TPR/DPO measurement, pulse titration analysis of catalyst characteristics (activation area, metal dispersion, etc.)
-Measurement and analysis of chemical adsorption isotherms, including monolayer coverage, active (metal) surface dispersion, average microcrystalline particle size, adsorption heat, etc

-Seamless integration of dynamic program heating and chemical adsorption isotherm measurement to comprehensively characterize catalyst characteristics
-Physical adsorption analysis capabilities such as surface area and porosity, capable of performing ultra-low pressure gas adsorption analysis on molecular sieves, activated carbon, silica, etc. to determine their microporous distribution characteristics and mesoporous pore size distribution
-On site sample preparation under flow or vacuum conditions
-High temperature pretreatment furnace (1100 C) and full process sequencing gas conversion and temperature climb, with maximum multifunctionality, meet various experimental needs
-Can be used in conjunction with mass spectrometry, and the mass spectrometer detector can be used simultaneously with TCD for TPR/TPD determination, completing qualitative and quantitative analysis of catalyst activity
-Can be equipped with a built-in steam generator
-Adopting diaphragm pump and maintenance free built-in molecular pump with air cooling, the vacuum degree reaches 10-10mmHg. The shared instrument vacuum system of mass spectrometry detectors greatly reduces user usage costs
-Switching from vacuum static analysis to program-controlled flow method TCD analysis in less than 1 minute
-Both vacuum volume measurement and flow based TCD measurement modes are data collected on the Windows platform