LHTCS-305 Zinc Oxide Desulfurization Catal...

LHTCS-305 Zinc Oxide Desulfurization Catalyst  1. Product Introduction LHTCS-305 Zinc Oxide Desulfurization catalyst is applicable to desulfurization of residue cracking gases or syngas and purification of feed gases for organic synthesis processes. It is suitable for both higher (350--408°C) and lower (150--210°C) temperature use. It can convert some simpler organic sulfur while absorbing inorganic sulfur in gas stream.   Main reaction of the desulfurization process is as follows: (1) Reaction of zinc oxide with hydrogen sulfide    H2S+ZnO=ZnS+H2O   (2) Reaction of zinc oxide with some simpler sulfur compounds in two possible ways: a. Organic sulfur compounds, catalyzed by zinc oxide, react with hydrogen to form  hydrogen sulfide:   CS2 + 4H2 = CH4 + 2H2S   C2H5SH + H2 = C2H6 + H2S   Then hydrogen sulfide is absorbed by zinc oxide   H2S+ZnO=ZnS+H2O b. Zinc oxide reacts directly with organic sulfur compounds   COS + ZnO = ZnS + CO2 LHTCS-305 is an ideal desulfurization adsorbent for deep purification cases, especially those at higher temperature (350--400°C).     2. Physical Properties Appearance Gray white extrudates Diameter, mm 4±0.2 Length, mm 4-10 ZnO, wt% =90 Bulk density, kg/L 1.10~1.25   3. Quality Standard Crushing strength, N/cm =40 Surface area, m2/g =30 Loss on attrition, % =5 Loss on ignition  (The original base burning  for 2 hr at 500?) ,wt% =2 Breakthrough sulfur capacity, wt% =28(350°C) =15(220°C) =10(200°C)   4. Normal Operation Condition Feedstock : synthesis gas , oil field gas, natural gas, coal gas. It can treat gas stream with inorganic sulfur as high as 2-3g/m3 with satisfactory purification degree. It can also purify gas stream with up to 20mg/m3 of such simpler organic sulfur as COS to less than 0.1ppm.   Normal operation condition is as follows: Pressure, MPa ambient to 4.0 Temperature, °C 150-400 Space velocity, h-1 1000-2000(gas) Sulfur in feed gas, mg/m3 1-20 (=200°C) 20-100 (=250°C) Sulfur in treated stream, ppm max0.1 Saturation sulfur capacity, wt% min30(400°C)