CATCryo is a measurement temperature control system to BELCAT. Combining with BELCAT, the furnace temperature can be controlled from -100°C to 1100°C without changing the furnace.
CATCryo is a temperature control system developed for BELCAT series. This system enables the study of adsorption, desorption, reaction behavior from/at low temperature.
| Cooling method | Liquid nitrogen spray |
|---|---|
| Temperature range | -100°C to 1000°C |
| Ramp rate | 100°C/min |
| Quick cooling | From 600°C to 0°C : 10min |
| Volume of LN2 bottle | 10litter (Option : 20litter) |
Reduction behavior of Pd supported catalyst
Pd supported catalyst is reduced at temperature below zero and emits hydrogen at around 50°C.
The metal dispersion ratio of the metal supported catalysis is often evaluated using CO pulse chemisorption measurement at 50°C. However, in case of the ceria-based catalysis, CO is consumed not only by the chemisorptions on metal, but also reaction with oxygen absorbed in ceria support to form CO2 and therefore, it is impossible to evaluate the metal dispersion ratio by the CO pulse chemisorptions measurement at 50°C. In the measurement at temperature below zero, the reaction of CO and O2 is suppressed and the metal dispersion ratio can be estimated accurately.
