Application 01
Preliminary air purification for cryogenic separation (cryogenic ASUs)
Technological challenges
In cryogenic ASUs and PSA/VPSA units, it is necessary to remove H₂O, CO₂ and hydrocarbons from the incoming feed air to avoid icing and to protect the underlying cold block and separation adsorbers.
Technological process
01 Feed air compression (4-10 bar(g)) with aftercooling
02 Pre-treatment in a combined bed of activated alumina/zeolite 13X (TSA)
03 Periodic thermal regeneration at 150–250 °C
Technical data
Dew point < –70 °C
CO₂ < 1 ppm
TSA cycle time: 4–8 hours
Load life: 5–10 years
Application 02
Oxygen production by air separation method (PSA/VPSA)
Technological challenges
High equilibrium adsorption capacity for nitrogen;
high desorption rate;
high N₂/O₂ separation coefficient, low operating energy costs;
long service life.
Technological process
01 Oxygen enrichment of air at normal temperature, PSA / VPSA separation
02 Atmospheric pressure desorption/vacuum desorption
Technical data
Oxygen concentration 93±3%
Cycle time 20 s – 60 s – 180 s
Service life 5–10 years
Application 03
Preparation of natural gas and LNG
Technological challenges
Drying and desulfurization of pipeline natural gas and LNG liquefaction plant feedstocks to prevent hydrate formation, cold block icing and corrosion of low-temperature heat exchangers.
Technological process
01 Feed gas (containing CO₂ / H₂S)
02 Drying at 4a / 13x using tsa technology to < 0.1 ppmv H₂O
03 Desulfurization (using modified aluminum oxide, etc.)
Technical data
H₂O outlet < 0.1 ppmv, dew point < -90 °C
H₂S removal, mercaptan removal
Regeneration temperature 260–290 °C
Column diameter 1.5–4.5 m
Application 04
Hydrogen, synthesis gas, oil refining and petrochemicals
Technological challenges
Plants require adsorbents and catalysts to be resistant to corrosive feedstocks, provide high product purity, and withstand pressure cycling.
Technological process
01 Tail gas conditioning from reformer/electrolysis/SMR
02 Multilayer PSA 5A + 13X + activated carbon
03 Liquid hydrocarbon drying at 3A or 4A
04 Olefins/catalyst drying section
Technical data
Product purity ≥ 99.999%
Recovery rate 85–90%
Operating pressure 20–40 barg
Application 05
Industrial drying and cleaning
Technological challenges
Compressed air, refrigerants, insulating glass and solvent streams require adsorbents that are low pressure drop, stable and reliable, compatible with thermal or pressure drop regeneration.
Technological process
01 Compressor/cooling
02 Heatless or heated dryers (double tower)
03 Filtration of particulate matter and oil mist
04 Final sampling and dew point control
Technical data
Pressure dew point -49 to -70 °C
Layer service life 3–5 years
Bulk density 0.70–0.78 g/ml
Particle size 1.6 / 3.2 / 4.0 mm
Application 06
Special industrial applications
Technological challenges
Medical oxygen production, ethanol dehydration, e-gases and customized catalyst support applications place extremely high demands on adsorbent purity, trace impurity control and uniformity of particle morphology.
Technological process
01 Packaging according to customer requirements (barrels / soft containers / vacuum packaging)
02 Conduct trace impurity analysis at ppb level for each batch
03 Manufacturing of catalyst supports according to individual requirements
04 Specialized quality control and batch traceability
Technical data
Medical oxygen purity ≥ 93% (O₂)
Ethanol dehydration grade purity ≥ 99.99 wt.%
Trace impurity analysis down to ppb level
