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- A process equipment emits 5 kg/h of volatile organic compounds (VOCs). If a hood placed over the process equipment captures 95% of the VOCs, then the fugitive emission in kg/h is O O 0.25 4.75 2.50 0.48Problem 7-69 Gasoline at 20°C (sp. gr. 0.719, μ = 0.000292 Pa-s) flows at the rate of 2 L/s through a pipe having an inside diameter of 60 mm Determine the Reynolds number Ans: 104,400A toxic pollutant with an initial concentration 598.08 is being treated in a batch reactor. Unfortunately, we were unable to as certain whether the substance degrades via first order or second order reaction. If the goal is to reduce the concentration by 95%, determine the number of days............... for 1 order deacy and the number of days ...............for 2nd order decay to reach the target effluent concentration: The reaction rate constant for the first and second order reaction are 0.5 d(-1) and 0.5x10(-3) mg(-1)d(-1) respectively.
- The SOo concentration in a stack is 500 ppm, the stack diameter is 12 ft, and the stack gas velocity is 65 ft/secl The gas temperature and pressure are 390 °F ami 1 atm. Calculate the approximate SO2 mass emission rate in Ih/day. (The atomic weight of S - 32 and the atomic weight of O « 16)a. 12,300 Ih/dayb. 16,400 Ih/daye. 24,600 Ih/dayd. 32,800 Ib/day7. The emissions from a stack were measured by collecting a sample on a filter. The sampler was operated for 15 minutes, had an inlet area of 12.5 cm2, an inlet velocity of 20 m/s, and collected 0.23 grams of PM. The stack gas had a temperature of 340 K, pressure of 1.018 atm, and volumetric flow of 245 scm/sec. Determine the PM concentration [ug/dscm], and the total rate of emissions [kg/day]. dscm: dry standard cubic meter1. Industrial representatives claim that the NAAQS for S02 is so low that one exceeds it if one strikes a simple woodenmatch in a modest-sized room. Is this true?(a) Calculate the concentration (in µg/m3) expected for striking such a match in a room that is 15 ft by 15 ft by 8 ft. A typical2-inch wooden match contains ≃ 2.5 mg of sulfur.
- The concentration of SO2 measured at an air monitoring station was 8 mg/m3 at T=30 oC and 1 atm pressure. Does this value exceed the 1-hour, primary NAAQS for SO2A smokestack emits pollutant Z into the air on a sunny day. The effective stack height is 270 m. The wind speed is 4 m/s, due east. Your house is located 4.0 km due east of the smokestack. The ground level concentration of pollutant A is 2.0 mg/m3at your house. Your friend lives 4.0 km east and 1.5 km south of the smokestack. a. What is the emission rate of the pollutant in kg/s? b. For the emission rate determined in part a, you now want to know the concentration of pollutant Z at ground level at your friend’s house. i. What parameters change in the dispersion modeling equation? For each parameter, include the parameter symbol, a definition of the parameter, and its new quantitative value and required units.ii. Is the concentration at your friend’s house lower, the same or higher than the concentration at your house and why? (you do not need to calculate the concentration) show all workThe air pollution control equipment on a municipal waste incinerator includes a fabric filter particle collector (known as a baghouse). The baghouse contains 424 cloth bags arranged in parallel, that is 1/424 of the flow goes through each bag. The gas flow rate into and out of the baghouse is 47 m3/s, and the concentration of particles entering the baghouse is 15 g/m3. In normal operation, the baghouse particulate discharge meets the regulatory limit of 24 mg/m3. when all 424 bags are in place and the emissions comply with the regulatory requirements: a) Calculate the fraction of particulate matter removed. b) Calculate the efficiency of particulate removal.
- Question 10 Carbon monoxide emissions are the result of incomplete oxidation of O Carbon in the waste to CO2 O Hydrogen in the waste to CO2 O Nitrogen in the waste to CO, Fluorine in the waste to co2Aluminum pieces inadvertently collect on the filter. a. If left on the filter, will the percent yield of the alum be reported as too high or as too low? Explain. b. If the aluminum pieces are detected on the filter, what steps would be used to remedy the observation? Explain.Why positive corona is used for all indoor air-cleaning applications even though it is less efficient?
