Chapter 17, Problem 8P

ENVIRONMENTAL ENGINEERING   a). Explain the harmful or beneficial effects of Ground Level Ozone and Stratospheric Ozone. b). Describe the photochemical reaction for the formation of Ozone. Then, explain how CFC as a base atmospheric pollutant can cause the catalytic destruction of Ozone and the subsequent stabilization of chlorine.  c). Compare the Traction Battery in a conventional Hybrid Electric Vehicle (HEV) with the batteries in a Plug-In Hybrid Electric Vehicle (PHEV) and then explain the possible emissions shift that may arise from PHEV use.            d). Explain three applicable methods of Particulate Control using gas-cleaning devices.

A polluted air stream flowing at 12,000 acfm at 90 °F and 1 atm has a concentration of 500 ppm of ethylbenzene (C8H10). Pilot plant studies of the adsorption process indicate that 11 lb (net) of ethylbenzene will be adsorbed per 100 lb of carbon during normal everyday operations. Calculate the minimum amount of carbon needed m one bed for a two-hour run time. Give your answer In pounds.

A 100-MW coal-burning electricity generating station operates at 33% efficiency burning coal containing 5% ash and 2% sulfur. Assume a coal heat content of 30 kJ/g. If 95% of the ash and 50% of the sulfur are trapped before emission from the stack by a filter, calculate (a) the emission rate to the atmosphere of ash and sulfur, in g/s and (b) the removal rate to the filter of ash and sulfur, in g/s .