The PCTPro is based on the Sievert’s method. A sample at known pressure and volume is connected to a reservoir of known volume and pressure through an isolation valve. Opening the isolation valve allows new equilibrium to be established. Gas sorption is determined by difference in actual measured pressure (Pf) versus calculated pressure (Pc). PCTPro is designed for the measurements of gas sorption on a single sample with a wide range of multiple dosing volumes combined with PID Pressure and PID Temperature control systems.
Types of measurements include:
Temperature programmed desorption (TPD) dynamic measurements
True kinetics and rate constants over the full sorption or desorption range as a function of pressure and temperature
Pressure-Composition Isotherms (PCT, PCI) for determination of equilibrium temperatures, pressures, and thermodynamics(fi gure below).
Charge and discharge cycling with repeated kinetic measurements to study long- term cycling effects on capacity and kinetics.
The PCTPro is well suited for gas-solid sorption in any forms (powders, bulk, films), as well as gas-liquid sorption.
• Standard Stainless Steel sample holder for 200 bar and 400 °C
• Stainless Steel High-temperature sample holder for 100 bar and 500 °C
• Small/Large sample holders for the best fl exibility against sample size and heterogeneity
• Liquid sample holder for 100 bar and 400 °C
• Thin Film sample holder for 100 bar and 400 °C
• CryoPro for low temperature from -260 °C to 100 °C for 200 bar
• MicroDoser for very small sample (from 1 to 500 mg)
|Temperature range||– 260°C to 500°C with different sample holders options|
|Calibrated reservoirs||2 high pressure calibrated volumes (Evo version) 5 high pressure calibrated volumes (E&E version)|
|Operating pressure range||From vacuum to 200 bar Pressure regulation: automated PID software controlled Aliquot sizing – Fixed P, ?P or f(?P)|
|Pressure measurements||4 pressure transducers Pressure regulation: 2 transducers for vacuum to 200 bar Experiment pressure: 1 transducer for vacuum to 200 bar 1 transducer for vacuum to 5 bar Accuracy: 1% of the reading|
|High accuracy option||Accuracy < 0,12% of the reading (vacuum to 5 bar) Accuracy < 0,025% full scale (vacuum to 200 bar)|
|Maximum sensitivity||3 µmole of gas (with the MicroDoser attachment)|
|Sorption Gas||Carbon Dioxide, Methane, Nitrogen, Argon,Hydrogen, Deuterium, Helium, Oxygen, Neon, Ammonia, n-alcanes from C2 to C6, more on request.|