Operating conditions for mesophilic hydrolysis catalysts

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Product features of medium-temperature organic sulfur hydrolysis catalysts: 1. Application characteristics – The feed gases used in the production of ammonia, methanol, polypropylene, liquefied petroleum gas, and food-grade CO2, which are derived from coal, natural gas, coke oven gas, or heavy oil, contain large amounts of organic sulfur in various forms. The main compounds involved are COS and CS2; their presence has a severe negative impact on the lifespan of the catalysts used in subsequent processes as well as on the quality of the products produced. Traditional methods such as cobalt-molybdenum hydrogenation conversion, low-temperature methanol washing, and liquid nitrogen washing require high investment costs and sophisticated equipment, while organic sulfur hydrolyzers at room temperature are not suitable for use at temperatures above 120°C or in conditions with high sulfur levels and high oxygen concentrations (>0.5%). Sulfur-resistant medium-temperature organic sulfur hydrolysis catalysts use active titanium dioxide and similar substances as their main active components, and feature a wide operating temperature range, high conversion rates for organic sulfur, resistance to high sulfur levels, high vapor/gas ratios, oxygen, as well as resistance to sulfation-induced deactivation. It can replace the cobalt-molybdenum hydrogenation conversion process; organic sulfur can be converted (>95%) without any need to modify the equipment, and it is cost-effective. Technologically, the converted waste heat and steam/gas ratio are utilized to directly connect a hydrolysis furnace, thereby converting organic sulfur into inorganic sulfur. It simplifies the process and is easy to operate, eliminating the complicated vulcanization process required before driving. It reduced the load on the precision desulfurization unit and improved the desulfurization efficiency. By selecting an appropriate process and using a sulfur-resistant medium-temperature hydrolysis catalyst correctly, in combination with an activated carbon desulfurization agent, organic and inorganic sulfur can be completely removed, **reducing the investment and operating costs of the facility. 2. Reaction principles:
COS + H2O = H2S + CO2 + 35.53 KJ/mol
CS2 + 2H2O = 2H2S + CO2 + 32.66 KJ/mol

3. Physicochemical properties:
Appearance:
Dimensions (mm):
Density (kg/L):
Conversion rate (%):
Radial crushing strength (N/piece):
Main components: White spherical particles, Ф3–5; density 0.7–0.8; (COS + CS2) >95; ≥60%; TiO2 and additives.

4. Process conditions:
Pressure (MPa):
Temperature (°C):
Space velocity (h-1):
Inlet organic sulfur content (mg/m3): <8.0
130–350
2000–5000
<300

5. Precautions:
Due to differences in manufacturing processes among various plants, the organic sulfur content as well as the oxygen content vary. Therefore, the amount of material to be used, the gas-to-solid ratio, and the operating conditions must be determined based on specific circumstances in order to achieve the optimal level of activity. 5.1 When the concentration of organic sulfur is relatively high, the space velocity can be appropriately reduced to meet process requirements. 5.2 Temporary high oxygen levels can affect the conversion of organic sulfur, but once normal conditions are restored, the conversion rate generally remains unaffected. QQ1899678