1、 Preface
Although T504 organic sulfur hydrolysis catalyst has been widely used in industry, it is prone to sulfate poisoning when applied in atmospheres containing O₂and H₂S, and the poisoning effect is exacerbated by increasing temperature. The Gas Purification Center of Hubei Institute of Chemistry, with the support of China Petrochemical Corporation, has developed EH-2 and EH-3 anti sulfation organic sulfur hydrolysis catalysts after years of research. In January 1998, the appraisal conducted by the Petrochemical Corporation confirmed that the catalyst was an international first.
This catalyst can be used for the conversion of organic sulfur COS and CS₂, RSH, etc. in coal gas, shift gas, coke oven gas, and various chemical feed gases.

Its characteristics are:
(1) Wide active temperature range (180-350 ℃), (2) fast reaction rate (space velocity 1000-6000h-1), (3) strong resistance to sulfate poisoning, (4) good selectivity, no side reactions such as CO shift and methane formation on the catalyst.

2、 Physical and chemical properties of catalysts

III. Quality Inspection Standards for Reaction Principles
1. Reaction principle
COS, CS₂or RSH react with residual water vapor in the feed gas to generate CO₂and H₂S. The reaction equation is:
COS＋H₂=H₂S＋CO₂                △H=-35.5KJ/mol
CS₂＋2H₂O=2H₂S＋CO₂

2. Laboratory quality inspection indicators
COS conversion rate&theoretical conversion rate of 90%
CS₂conversion rate≥ 85% of theoretical conversion rate    (≥200℃)
Compressive strength: 25N/piece

VI. Normal Operation and Usage Conditions
Airspeed operation control indicators:
1. Airspeed: 1000-3000H-1
2. Temperature: 200-250 ℃ (generally 30 ℃ higher than the dew point temperature of the gas)
3. Pressure: Normal pressure~8.0Mpa
4. Temperament requirements: Oxygen content EH-2≤ 2000ppm    EH-3≤ 6000ppm    Hydrogen content: 10%