3. Physisorption
Physisorption is a reversible process that allows many gaseous species (H 2 O, CO 2 , N 2 , CO, C x H y , etc.), including noble gases, to be adsorbed by trapping onto the mostly cooled surface of an adsorbent. This is a multi-layer phenomenon in which each adsorbed particle constitutes a potential adsorption site for the next layer (figure 7 ). The forces binding the adsorbent to the adsorbate remain weak, ranging from 0.5 to 50 kJ · mol –1 , i.e. a tenth of the energy of a covalent bond.
The Ultimate Scientific and Technical Reference
This article is included in
Unit operations. Chemical reaction engineering
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Physisorption
Rare gas purification and separation processes
Bibliography
Events
DINGUE (Development In Noble Gas Understanding and Expertise. Workshop ) organized each year in conjunction with the GOLDSCHIMDT conference.
Standards and norms
CF flange connection elements: the elements are made of 316L stainless steel [(DIN 17 440 – WN 14 404) Z2CND 17-12] and comply with "Pneurop" standard 6601/1981 and DIN 28 403.
OFHC copper (Oxygen Free High Conductivity): copper produced using an American method. The French equivalent is Cu-c1 or 2. ISO 431 standard
Directory
Ultra-high vacuum equipment (CF flange, translation and electrical bushing, copper gasket, etc.)
Adixen Vacuum Products SAS (Pfeiffer) http://www.pfeiffer-vacuum.com
Caburn-MDC Europe SARL http://www.mdcvacuum.co.uk
Cryotherm...
The Ultimate Scientific and Technical Reference
