◼PRODUCT DESCRIPTION

GR-971cot aly st is used in claus reaction sulfur recovery unit in oil refining, petrochemical and coal chemical industry. It is suitable for various concentrations of hydrogen sulfide and process conditions. It can be loaded in full bed at any stage of claus reactor or combined with other types and functions of catalysts through staged loading. when used for staged loading, GR-971is loaded in the upper part of the converter, while alumina- based catalysts GR-02or GR-300are loaded in the bottom of the converter. It is also suitable for cBA sulfur recovery process.

◼What are the primary functions of the GR-971 cobalt-molybdenum catalyst in a Claus unit?

It has two main functions: first, it catalyzes the Claus reaction between H₂S and SO₂ (2H₂S + SO₂ → 3S + 2H₂O) to produce sulfur; second, it efficiently hydrolyzes organic sulfur species such as COS (carbonyl sulfide) and CS₂ (carbon disulfide) in the process gas, converting them to H₂S, thereby significantly improving the unit's overall sulfur recovery.

◼Why is it recommended to load GR-971 and alumina catalyst in a staged manner?

This is an optimization strategy. GR-971, with its excellent organic sulfur hydrolysis ability and high Claus reaction activity, can be placed in the upper bed to initially process complex gases containing COS/CS₂. The lower bed, loaded with alumina catalyst, focuses on completing the final Claus reaction and deeply converting the remaining H₂S and SO₂. This combination achieves complementary functions and maximizes overall conversion efficiency.

◼Is this catalyst suitable for feed gas from a sour water stripping unit?

Yes, GR-971 catalyst is well suited for processing sour gas from sour water stripping units or other refineries. It has excellent adaptability to a wide range of H₂S concentrations and gas stream compositions, and can effectively cope with feed gas fluctuations.

◼What are the process operating conditions required for GR-971 catalyst?

The catalyst performs optimally within the typical Claus reaction temperature range (approximately 280-340°C). Care should be taken to avoid excessively high reactor temperatures, which may lead to catalyst sintering and deactivation, or excessively low temperatures, which may cause sulfur vapor condensation in the catalyst pores (sulfur plugging).

◼How does GR-971 catalyst function in the CBA process?

In the cold bed adsorption (CBA) process, GR-971 catalyst performs both the Claus reaction and organic sulfur hydrolysis functions during the reaction phase. Its high activity ensures maximum sulfur conversion and recovery before the regeneration phase of periodic operation.

Shandong Weiyijia Co., Ltd. is a high-tech enterprise dedicated to the field of industrial catalytic purification. We specialize in the research, development, production, and sales of a wide range of high-performance catalysts and purifiers, providing key materials and technical support to the global petrochemical, coal chemical, gas purification, environmental protection, and new energy industries.

As a professional catalyst supplier, we deeply understand the core role of catalysts in downstream processes.

Leveraging years of experience in technology research and development and engineering applications, we have developed several mature product lines, including:

• Desulfurizer Series: Efficiently removes inorganic and organic sulfur from feed gases and liquids, protecting downstream equipment.

• Deoxidizer Series: Precisely removes trace oxygen from olefins (such as ethylene and propylene) to prevent catalyst poisoning.

• Dechlorinator Series: Removes chlorides from process materials, protecting equipment from corrosion.

• Customized Catalysts: We provide customized solutions tailored to our customers' specific process conditions and requirements.

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