29.22 In a wetted-wall tower where ammonia, NH3, is stripped from an ammonia-water solution into an air stream, the overall gas coefficient, K, is 3.12 × 10–9 kg mol/m2 - s - Pa. At a plane in the tower, the bulk concentration of the falling aqueous stream is 4 kg mol/m³ of solution and the partial pressure of ammonia in the rising gas stream is 3.04 × 10³ Pa. For dilute solutions of ammonia in water the equilibrium partial pressure may be evaluated by Henry's law: PAi = 1360 Pa/(kg mol/m³)cAi If the gas phase comprises 75% of the total resistance to mass transfer, calculate a. the individual gas-film coefficient, kg; b. the individual liquid-film coefficient, k̟; c. the overall liquid-film coefficient, Kį;

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Hazard Analysis and Design in Chemical Engineering

Hazard is the intrinsic property of a material or process which harms the people, buildings, or environment. Health, safety, hazard, risk assessment, loss prevention, and environmental consideration play an important role while designing a chemical processing plant. Hazard is often confused with risk. Risk measures the magnitude of loss and injury of likelihood incidents or the consequence and frequency of incidents.