Gas sorption and textural properties

Devices allowing the aquisition of adsorption/desorption isotherms for a large number of gases (N₂, Kr, Ar, CO₂, H₂...) but also condensable vapours (H₂O...). Complementary, these equipments allow to have access to a large amount of informations on the studied materials from the determination of the specific surface area to the access of the micro and mesoporosity of the powders or to measure the quantities of water adsorbed according to the relative humidity.

Surface analyzer		Belsorp-Max model BEL JAPAN Inc.III	ASAP2020Plus model Micromeritics
Framework of use		Device used in projects at ISTERRE
Technical specifications	Types of samples:	Powder, massif solid
	Technical datas:	- 3 degassing stations located at the analysis ports: ambient temperature to 550°C under secondary vacuum – 3 analysis ports – Pressure sensors on each port: 133 kPa et 1.33 kPa – Pressure range: p/p0= 10-4 à 0.997	- 2 degassing stations independant of the analysis station : ambient temperature to 450°C under secondary vacuum – 1 analysis port – Pressure sensors on the analysis port: 133 kPa, 1.33kPa et 13.3 Pa – Pressure range: p/p0= 10-6 à 0.997
	Possible types of analysis:	- Measurement of very small specific surface areas with Kr – Determination of nitrogen specific surface areas using the BET or Langmuir methods – Measurement of nitrogen adsorption and desorption isotherms and determination of the distribution of micropores (<2nm) and/or mesopores (2nm-50nm) by t-plot, Horvath-Kawazoe, BJH, NLDFT, DFT methods. – Measurement of adsorption and desorption isotherms of water vapour, CO2, hydrogen at different temperatures... – Density measurement
Persons in charge of the tool Associated team		Scientific manager : – Bruno Lanson Technical manager : – Valérie Magnin	04 76 63 51 95 04 76 51 40 78