The sorption pump is a vacuum pump that creates a vacuum by adsorbing molecules on a very porous material like molecular sieve which is cooled by a cryogen, typically liquid nitrogen. The ultimate pressure is about 10−2 mbar. With special techniques this can be lowered till 10−7 mbar. The main advantages are the absence of oil or other contaminants, low cost and vibration free operation because there are no moving parts. The main disadvantages are that it cannot operate continuously and cannot effectively pump hydrogen, helium and neon, all gases with lower condensation temperature than liquid nitrogen. The main application is as a roughing pump for a sputter-ion pump in ultra-high vacuum experiments, for example in surface physics.
The sorptionpump is a vacuum pump that creates a vacuum by adsorbing molecules on a very porous material like molecular sieve which is cooled by a cryogen...
uses cryopumping. Other types are the sorptionpump, non-evaporative getter pump, and titanium sublimation pump (a type of evaporative getter that can...
charcoal or a zeolite. As the sorbent saturates, the effectiveness of a sorptionpump decreases, but can be recharged by heating the zeolite material (preferably...
heating element. These can often be renewed or replaced. Getter pump or sorptionpump In laboratory vacuum systems, the bulk NEG getter is often held...
conventional pumps cannot be used, as they rely on viscous flow and fluid pressure. Instead, special sorptionpumps, ion pumps and momentum transfer pumps i.e...
A roughing pump is any vacuum pump (typically mechanical) used to initially evacuate a vacuum system, as a first stage towards achieving high vacuum or...
"Calorimetric Studies and Structural Aspects of Ionic Liquids in Designing Sorption Materials for Thermal Energy Storage". Chemistry: A European Journal. 22...
is one of six End Use Energy Demand Centres. Critoph has worked on sorption heat pump and refrigeration systems since 1982 and has published 89 papers,...
empirical correlations, or laboratory-derived sorption isotherm methane storage capacity data. Laboratory sorption isotherms provide information about the storage...
occur through sorption to the barrier materials or precipitation from the dissolved state. Organic compounds tend to be undergo sorption due to hydrophobic...
porous carbon. In other words, CDI is an electro-sorption method using a combination of a sorption media and an electrical field to separate ions and...
refrigeration can further be classified as: Vapor-compression refrigeration Sorption Refrigeration Vapor-absorption refrigeration Adsorption refrigeration The...
many heavy metals by decreasing their solubility and increasing their sorption onto the cement mineral phases. Nickel, zinc and lead are commonly found...
indoors in summer. Measurement of VOCs from the indoor air is done with sorption tubes e. g. Tenax (for VOCs and SVOCs) or DNPH-cartridges (for carbonyl-compounds)...
sewage sludge may include toxic chemicals removed from liquid sewage by sorption onto solid particles in clarifier sludge. Reducing sludge volume may increase...
cartridge is a metal or plastic case containing from 25 to 40 grams of sorption media such as activated charcoal or certain resins. The service life of...
column by various physicochemical and biological processes, including sorption, desorption, biodegradation and biosynthesis. Hydrophobic molecules are...
I. Bondar; K. Nagai; B. D. Freeman; I. Pinnau (4 January 2000). "Gas sorption, diffusion, and permeation in poly(dimethylsiloxane)". Journal of Polymer...
herbicides persist depends on the compound's unique chemistry, which affects sorption dynamics and resulting fate and transport in the soil environment. Pesticides...
major barriers of bulk materials, rate of sorption and release temperature.[citation needed] Enhancement of sorption kinetics and storage capacity can be improved...
organic chemicals such as pharmaceuticals and personal care products. The sorption potential is affected by water matrix, pH, ionic strength and aging of...
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