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Micropore physi-/chemisorption analyzers:
autosorb iQ

Micropore physisorption / chemisorption analyzers

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These high-sensitivity gas sorption analyzers use proprietary small cold-zone technology for detailed micropore size distributions of up to three samples simultaneously. They perform the most challenging measurements of zeolites, activated carbons, and MOFs, for novel materials research in environmental and industrial applications such as gas storage and supercapacitors. Their internal vacuum pumps and dedicated sample preparation stations minimize bench space. They are available in different configurations as chemisorption units, still with full physisorption capability, for all-in-one catalyst characterization.

Technical specifications

Pressure transducers
XR station 0.1 torr + 10 torr + 1000 torr
MP station 1 torr + 10 torr + 1000 torr
AG station 1000 torr
Pressure accuracy
0.1 torr, 1 torr <±0.15 % of reading
10 torr <±0.12 % of reading
1000 torr <±0.11 % of full scale
Built-in vacuum system
High-vacuum construction Metal-to-metal seals in critical measurement zones
Vacuum system (XR/MP) Turbo-molecular drag pump and dry diaphragm pump
Ultimate vacuum (XR/MP) 5 x 10⁻¹⁰ mbar (5x10⁻⁸ Pa) (3.75 x 10⁻¹⁰ mm Hg)
Vacuum system (AG) Two-stage rotary oil pump and foreline trap
Ultimate vacuum (AG) <2.5 x 10⁻³ mm Hg (<3.3 x 10⁻³ mbar)
Physisorption capabilities
Analysis stations 1, 2, or 3
Parameters measured Pore size distribution, pore volume, surface area
Adsorbates N₂, Ar, Kr, CO₂, O₂, H₂, CH₄, etc.
Chemisorption capabilities
Analysis stations 1
Parameters measured Active (metal) area, dispersion, crystallite size
Chemisorbed amount Combined, reversible (weak), irreversible (strong)
Chemisorption monolayer Extrapolation, Langmuir, Dissociative Langmuir, Freundlich, Temkin
Catalyst parameters Active (metal) area, dispersion, crystallite size
Chemisorption enthalpy Clausius-Clapeyron
Cell stem diameter 6 mm, 12 mm
Chemisorption furnace
Type Ceramic tube furnace with safety heat shield
Maximum temperature 1100 °C
Temperature accuracy 0.1 % of span
Temperature stability ±1 °C
Ramp rates 1 °C to 50 °C per minute
Maximum temperature 1100 °C
Furnace cooling Built-in fan
Furnace/lid closure/separation Automatic
Adsorbates N₂, Ar, Kr, CO₂, O₂, H₂, NH₃, etc.

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