Problem 4. a. Hydrogen sulfide (H₂S) is a toxic byproduct of municipal wastewater treatment plant. H₂S has a TLV-TWA of

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Problem 4 A Hydrogen Sulfide H S Is A Toxic Byproduct Of Municipal Wastewater Treatment Plant H S Has A Tlv Twa Of 1 (36.27 KiB) Viewed 49 times

Problem 4. a. Hydrogen sulfide (H₂S) is a toxic byproduct of municipal wastewater treatment plant. H₂S has a TLV-TWA of 10 ppm. Please convert the TLV-TWA to lbm/s. Molecular weight of H₂S is 34 lbm/lb-mole. If the local ventilation rate is 2000 ft³/min. Assume 80 F is the temperature and 1 atm pressure. Ideal gas constant, Rg = 0.7302 ft³-atm/lb-mole-R. Conversion of Rankine, R = 460+ F. Assume, k = 0.1 (5) b. Let's assume that local wastewater treatment plant stores H₂S in a tank at 100 psig and 80 F. If the local ventilation rate is 2000 ft³/min. Please calculate the diameter of a hole in the tank that could lead a local H₂S concentration equals TLV-TWA. Choked flow is applicable and assume y= 1.32 and Co= 1. Ideal gas constant, Rg 1545 ft-lb/lb-mole-R, x psig=(x+14.7) psia = (x+14.7) lb/in² (10)