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971 Sulfur recovery catalyst
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971 Sulfur recovery catalyst
- Details
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- Commodity name: 971 Sulfur recovery catalyst
- Commodity ID: 971
Catalyst 971 is a highly active Claus and deoxygenation-resistant dual-function sulfur recovery catalyst. Its physicochemical properties and technical specifications meet internationally advanced standards, representing a pioneering domestic innovation with leading technological position.
Product Features and Applications
Catalyst 971 is a highly active Claus and deoxygenation-resistant dual-function sulfur recovery catalyst. Its physicochemical properties and technical specifications meet internationally advanced standards, representing a pioneering domestic innovation with leading technological position. When paired with 811-300Al₂O₃ catalyst in the same unit under identical process conditions, it enhances total sulfur conversion by approximately 1-1.7%. It is particularly suitable for sulfur recovery units experiencing significant fluctuations in H₂S concentration or flow rate within acidic gas streams.
Physical and Chemical Properties
Item
Technical Parameters
Appearance
Reddish-brown spherical
Dimensions
Φ4～6mm
Bulk Density 0.70~0.82kg/l Primary Chemical Composition Al₂O₃ + co-catalyst Specific Surface Area ＞260m2/g Average Crushing Strength ≥130 N per piece Abrasion Rate ＜0.3% Usage Precautions
971 catalyst can be used in any reactor stage of sulfur recovery units for layered packing with Al₂O₃ or Al₂O₃-based catalysts, or for full-bed packing. When used in a layered packing configuration, 971 catalyst should occupy at least one-third of the reactor bed volume in the upper section. This placement protects or mitigates sulfation damage to the underlying Al₂O₃ or Al₂O₃-based catalysts caused by “oxygen leakage” in the process gas, thereby extending catalyst service life.
Catalyst Loading
(1) Catalyst loading must be performed under dry conditions. Avoid loading during rainy weather or in environments with high humidity to prevent compromising strength.
(2) Before loading the catalyst, thoroughly clean the reactor interior. Install the grate plate, lay an 8-mesh stainless steel wire mesh over it, and sequentially layer and level 100mm-high ϕ20mm ceramic balls followed by 50mm-high ϕ10mm ceramic balls. Then load the catalyst. The grate plate and wire mesh must be capable of at least 3 years of service.
(3) When pouring catalyst from the drum, if excessive fine powder is present, it must be screened through an 8-10 mesh sieve before use. During loading, place the catalyst into a cloth bag first, then hoist it into the reactor. The catalyst drop height should not exceed 500mm.
(4) Lay wooden planks during catalyst loading. Operators must stand on these planks during loading. The use of metal tools to dig into the catalyst is strictly prohibited. After loading to the predetermined height, level the catalyst surface with wooden tools. Then, place a 100mm-thick layer of ϕ10mm ceramic balls on top to mitigate gas flow impact on the catalyst surface.
(5) Immediately seal the manhole after catalyst loading is complete. Before startup, prevent moisture and process gas from entering the reactor. Prior to operation, purge with dry air to remove bed powder.Transportation and Storage
971 catalyst is packaged in woven bags lined with plastic bags (or packaged according to customer requirements). During transportation, the catalyst must be protected from moisture and subjected to no violent shaking, rolling, or impact. Rain protection measures must be implemented. The catalyst should be stored in a dry, well-ventilated warehouse, strictly guarding against moisture absorption or contamination.
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