GAS-GAS ABELGASSSS SEPA Flashcards
is a widely used technique for the separation of one or more
gases from a mixture, either to give multiple products or to purify a single
product.
Gas separation
Industrial application :
Treatment of fumes from coal-fired
plants: removal of CO2 to reduce the
greenhouse effect.
Separation and purification of
commercially important gases : H2, CH4, and O2 from natural gas
Gas-Gas Sepa Methods
Adsorption
Membrane Sepa
Cryogenic Distilation
Condensation
Stripping
is a separation process in
which a gaseous component is separated
from a gas stream by the use of a solid
material.
Gas adsorption
Used for odor control at various types of
chemical-manufacturing
Gas adsorption
most common
adsorbent materials in Gas adsoption
Activated carbon/Heated charcoal
Adsorption process
- Low pressure, isolated site begin to adsorb gaas molecule
- Pressure increases, form monolayer one molecule thick
- Increasing gas pressure: multilayer, small pores of the sample will be filled: BET equation used to calculate surface area
- Further increase in gas pressure, complete the coverage of the sample to fill the pores
used to
separate mixed gas into individual gases while
achieving a high purity level
Pressure Swing Adsorption
In PSA, Gases are separated under pressure based on
the ____ and ____
species molecular characteristics and
affinity for an adsorbent material.
Gas separation across a membrane is a
Pressure-driven process
driving force is the difference in pressure between inlet of raw material and
outlet of product.
Gas separation across a membrane
The membrane used in the process is a generally _____, so there
will not be a severe leakage of gas through the membrane.
non-porous layer
used in the
oxygen enrichment from air for smallscale medical applications and for
organic vapor recovery.
Plate and Frame device
employed to separate
acid gases (mainly CO2) from natural gas
Spiral wound
Common mebrane modules
Spiral wound
Plate and Fram device
A process of separation of gaseous mixture at
high pressure and low temperature
Cryogenic Distillation
Used in the separation of air into N2, O2, and
Argon
Cryogenic Distillation
It is most economical for processing 100 to
5,000 tons of air per day.
Commonly used in industries including
production of industrial gases, combustion
enrichment and specialty gas production
Cryogenic Distillation
places
where cryogenic distillation takes place
Cryogenic air separation units (ASUs) or Air Separation Plants
Separation of nitrogen, oxygen, and argon depends on
their different boiling points.
Cryogenic distillation
separates air into a nitrogen-rich vapour and an
oxygen-rich liquid
High-Pressure Distillation Columns
further purification of nitrogen occurs leaving behind
oxygen and argon
Low-Pressure Distillation Columns
are the best when it comes to ultra-high purity
gases
cryogenic distillations
are appropriate for mass scale manufacturing
CRYO
popular in several industries.
CRYO
