An urban county with an area of 1,000 mile² has an estimated 18 million miles of vehiculartraffic per day and has a large power plant. The power plant produces 350 MW of electricityat an efficiency of 39%, burning 10,000 Btu/lb coal. The vehicle emission factor for VOCs is6 grams/mile; the coal-fired boiler emission factor for VOCs is 1.4 lb/ton coal; biogenicemission of VOCs is 0.4 kg/km²-hr on the average. Determine the total emissions of VOCs intons/day from all sources (mobile, power plant, and biogenic).

First, we need to calculate the total VOC emissions from vehicular traffic. The emission factor for…

Answered: An urban county with an area of 1,000…

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter20: Hydrogen

Section: Chapter Questions

Problem 4P

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An urban county with an area of 1,000 mile2 has an estimated 18 million miles of vehicular traffic per day and has a large power plant. The power plant produces 350 MW of electricity at an efficiency of 39%, burning 10,000 Btu/lb coal. The vehicle emission factor for VOCs is 6 grams/mile; the coal-fired boiler emission factor for VOCs is 1.4 lb/ton coal; biogenic emission of VOCs is 0.4 kg/km2 -hr on the average. Determine the total emissions of VOCs in tons/day from all sources (mobile, power plant, and biogenic).
A stack gas at 1 atm and 440oC contains 1100 ppm NO2. If the stack gas is emitted at the rate of 15,000 m3/min, what is the NO2 emission rate in grams per second?
A distillate fired industrial boiler rated at 60 million BTU/hr uses 2 million gallons per year of 0.25% sulfur distillate. What are its emissions of nitrogen oxides (NOx), SO2 and formaldehyde? Emission factors of air pollutants for distillate combustion in an industrial boiler are given below. NOX Pollutant Emission factor (lb/103 gallon 20 * SO2 142S* PM 10 2 CO 5 VOCs 0.2 Benzene 0.1863 Formaldehyde 1.7261 Cadmium Chromium(VI) *S= %S in fuel 0.0015 0.0002
A lignite-fired power plant was designed to produce electricity at a maximum capacity of 750 MW. By average over a year, the plant is operated at 35% plant efficiency and 65% of the design capacity. Assume that the entire amount of sulfur in lignite coal entering the plant is converted to sulfur dioxide (SO2). The power plant is equipped with an 85% efficiency SO2 removal unit. Use the engineering calculation approach and the coal information (dry basis) found in your lecture notes to determine emission rate of SO2 in lb/hr and in lb/BTU input.
Consider a new 1800 MW power plant that burns dry sub-bituminous coal in a PC-wall-fired, wet bottom furnace with plant efficiency of 39%. Use the emission factors in your lecture notes to determine the emission rates of all particulates, PM10, SOx, NOx and CO in ton per year. No gas treatment equipment was installed.
Estimate the mass of oxygen to be supplied for a new activated sludge plant at Pea Ridge to treat a flow rate of 8,450 m³/day. Assume that the concentration of bCOD going into the system (So) is 137 mg/L, that the bCOD leaving the system (S) is 16.3 mg/L, and that the mass of cells produced per day (Pxvss) is 277.4 kg/d. Express your answer in kg/day and round to the nearest integer.
The ideal equation for the combustion of cellulose is C6H10O5 + 6O26O2 + 5H2O. What is a similar idealized equation for pyrolysis? What end products might you expect?
. A wastewater treatment plant treats industrial waste and discharges 5.0 x 10-6 M benzene (C6H6) at a flowrate of 8 m3 /s into a 1.0 x 109 m3 lake. The stream feeding the lake has a benzene concentration of 1.0 μg/L and a flowrate of 100 m3 /s. Benzene has a natural decay rate of 0.038day-1.a) What is the concentration of benzene in the downstream? What is the maximum contaminant limit (MCL) for benzene? Does the concentration you calculated meet the MCL set by the Safe Drinking Water Act?b) If the standard is exceeded, by how many μg/L of benzene in the wastewater effluent will the treatment plant need to reduce?
In Tikrit city, environmental engineers are monitoring the diffusion of CO2 in the air as part of a pollution control study. The air-carbon dioxide mixture is at 295 K and 202.6 kPa, and the concentration of CO2 at two planes, 3 mm apart, is 25 vol.% at the first plane and 15 vol.% at the second plane. The diffusivity of CO2 in air under these conditions is 8.2 × 106 m²/s. The study aims to calculate the rate of CO2 transfer across these two planes in two different scenarios: 1. What is the main engineering issue being addressed in this scenario? 2. Calculate the concentration of CO2 at the two planes in mol/m³ and determine the rate of transfer of CO2 using the diffusivity of CO2 in air. 3. With an engineering solution approach to solve the issue, calculate the rate of transfer of CO2 across the two planes assuming two scenarios: equimolecular counter diffusion and diffusion through a stagnant air layer. 4. Determine if there is a significant difference between the results of…

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