Ethylene / Propylene purification catalysts are typically located upstream of Polymerisation catalysts and used for trace removal of impurities.
3.1 Ethylene Purification:
3.1.1 H2S Removal: PolyMax® 172
PolyMax® 172 is a ZnO based absorbent for removal of H2S from ethylene feed. PolyMax® 172 is a high surface area absorbent and typical H2S in the product stream is < 0.05 ppm.
PolyMax® 172 is non-regenerable and is supplied in extrusion shape.
3.1.2 CO / O2 / H2 Removal: PolyMax® 300 series
PolyMax 300 series absorbents remove CO / O2 / H2 along with traces of H2S from ethylene stream.
3.1.3: Trace removal of C2H2 (acetylene), H2: PolyMax® 200 series
PolyMax 200 is precious metals catalyst for trace removal of C2H2 & H2 by hydrogenation to ethylene.
3.2 Propylene Purification:
3.2.1 Sulfur / Arsine / Phosphine removal: ActiSorb® 300 series
ActiSorb® 300 is a versatile absorbent for trace removal of COS / Arshine / Phosphine from propylene streams.
ActiSorb®300 is non-regenerable and is supplied in the form of Tablets.
3.2.2 Methyl Acetylene & Propadiene Removal (MAPD)
G68-F is a precious metals catalyst for hydrogenation of MAPD in propylene stream.
3.2.3 Bulk removal of COS: PolyMax® 153
For bulk removal of COS, precious metals based PolyMax® 153 is recommended. COS is converted to H2S by hydrolysis with moisture in the feed. H2S in removed downstream using PolyMax® 172 adsorbent.
3.3 Methanation: Meth 134 & Meth 135
Methanation catalyst is used for removal of CO & CO2 from various hydrogen streams in steam cracker or polymer units. Meth 134 is the standard Methanation catalyst, while Meth 135 is a high activity version suitable for operation at low temperature.
Both Meth 134 & 135 needs in-situ reduction for operation. In case in-situ reduction facility is not available, catalyst can be supplied in “pre-reduced” and “Stabilised” condition designated as Meth 134 RS & Meth 135 RS. RS version catalyst is surface stabilised and can be handled just like a normal oxide catalyst.
- Synthesis Gas
- Chemicals & Specialties
- Air purification
- Selective Hydrogenation for Steam Crackers – OleMax®
- Alkanes Dehydrogenation and Dealkylation – CATOFIN®
- Hydrogenation of Pyrolysis Gasoline
- Production of Terephthalic Acid (PTA)
- Aromatics and Derivatives
- Conversion of Methanol to Propylene – MTPROP
- Ethylene Dichloride (EDC)
- FCC Off-Gas Treatment
- Polypropylene Production – C-Max®
- Styrene Production – StyroMax®