What is the difference between absorption and adsorption?
- Absorption is the process in which a fluid is dissolved
by a liquid or a solid (absorbent).
- Adsorption is the process in which atoms, ions or
molecules from a substance (it could be gas, liquid or dissolved
solid) adhere to a surface of the adsorbent. Adsorption is a
surface-based process where a film of adsorbate is created on the
surface while absorption involves the entire volume of the
absorbing substance. There are some adsorption analyzers (eg V-Sorb
2800P) by using gas (like N2, Kr etc) as adsorbates to attach on
materials to get samples adsorption isotherms, then to know surface
area, pore size and so on data.
Adsorption: Some of the industrial applications
for adsorption are air-conditioning, adsorption chillers, synthetic
resin and water purification. An adsorption chiller does not
require moving parts and hence is quiet. In pharmaceutical industry
applications, adsorption is used as a means to prolong neurological
exposure to specific drugs or parts thereof. Adsorption of
molecules onto polymer surfaces is used in various applications
such as in the development of non-stick coatings and in various
Absorption: The common commercial uses of
absorption cycle are absorption chillers for space cooling
applications, ice production, cold storage, turbine inlet cooling.
High efficiency operation, environmentally friendly refrigerants,
clean-burning fuels and few moving parts that require maintenance
make absorption a very good choice for consumers. The process of
gas absorption by a liquid is used in hydrogenation of oils and
carbonation of beverages.
Answer 1 Adsorption and absorption are two
- Absorption is the chemical integration of one chemical into
another. When you drink a glass of water, you are absorbing it, as
the water becomes part of you.
- Adsorption occurs when one substance holds another via physical
bonds. If you spill a glass of water on your shirt, it is adsorbed
as the fibres will hold the water until heat dries out the