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H. Christopher Frey

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Real-World Vehicle Emissions



CE 476/576 Air Pollution Control (offered every fall)

Course Objectives

            The student completing this course will be able to:  (1) identify, classify, and prioritize major emission sources; (2) categorize and describe major types of regulations; (3) apply mass balance, energy balance, chemical equilibrium, and chemical kinetic concepts to estimate pollutant formation rates for a variety of major stationary and mobile sources; and (4) identify, analyze, design, and evaluate air pollution prevention and control strategies.

Course Description

            Fundamentals of air pollutant formation and control from stationary and mobile emission sources.  Chemical kinetics, mass and heat transfer, and thermodynamics affecting gaseous and particle pollutant formation in combustion systems and chemical processes.  Study of sulfur dioxide, nitrogen oxides, particulate matter, volatile organic compounds, hydrocarbons, and air toxics formation and control.  Principles of conventional and advanced flue gas desulfurization, thermal and fuel NOx control, and particle/air toxics emission control will be among the emission topics to be explored.


            This course is multi-disciplinary and can accommodate students with diverse engineering backgrounds.

            For undergraduate students, the following prerequisites apply:

Environmental Engineering Majors:  Prerequisites — Introduction to Environmental Engineering (CE 373), Thermodynamics (MAE 301 or ChE 315), and Civil Engineering Systems (CE 375), Corequisites — Statistics (ST 370)

Chemical Engineering Majors.  Prerequisites —Chemical Engineering Design I (ChE 450).

All other majors.  Please discuss with the instructor.

            For graduate students in CE 576, there are no formal prerequisites or corequisites. Students with background in thermodynamics, heat transfer, chemistry, and related areas will be prepared for this course.  Please contact the instructor with any questions. 



CE/MEA 479/579 Air Quality (offered every spring).  Available via Engineering Online.

Course Objectives

            Students completing this course will be able to:  (1) identify major types of air quality problems based upon types of pollutants, chemical transformations, and temporal and spatial scales; (2) apply mass and energy balance, chemical equilibrium, and chemical kinetic concepts to estimating pollutant emission rates; (3) apply similar concepts to estimating the formation of secondary pollutants (e.g., ozone); (4) classify, compare, and evaluate alternative air quality models; (5) develop and apply simplified air quality models for both non-reactive and reactive pollutants; and (6) identify and evaluate control strategies for mitigating atmospheric air pollution problems. 

Course Description

            The topics covered in this course include air quality management issues, sources of air pollutants, atmospheric physics and chemistry and their relationship to pollutant transport and transformations, air quality meteorology, and air pollutant dispersion modeling.  Students will learn about the major types of regulations that motivate the need to estimate and measure atmospheric air quality, the major types of pollutants that are regulated by such air quality standards (e.g., sulfur oxides, nitrogen oxides, particulate matter, carbon monoxide, tropospheric ozone, and lead), the major emission sources for such pollutants, the role of anthropogenic and biogenic sources in global chemical cycles, gas and aqueous-phase chemistry in the atmosphere, basic principles of meteorology as applied to air quality (including energy balance, winds, temperature, equations of motion, and atmospheric diffusion), and the fundamentals and practical aspects of commonly used air quality models.   


            For the undergraduate sections, the prerequisites are: CE 382 and CE 373; or MEA 422; or CHE 311, and the co-requisites are: ST 370 or ST 301 or ST 380.  For students in the graduate section, it is assumed that you have had a college-level chemistry course and that you are familiar with chemical equilibrium and chemical kinetics.  Coursework in thermodynamics is also helpful, but not required.



CE/NE 772 Environmental Exposure and Risk Analysis (offered in spring of even numbered years)

Available on-campus and via Engineering Online distance education program.



Upon completing this course, students will be able to:

(1)  describe the framework of risk analysis;

(2)  quantify human exposures to hazardous substances in the environment;

(3) calculate consequences and probabilities of adverse human health outcomes;

(4) apply risk assessment concepts and tools to selected case problems of risk analysis;

(5) identify and evaluate the types of data and models available for estimating the health consequences of various environmental exposures;

(6) quantify variability and uncertainty in exposure and risk assessment; and

(7) evaluate and critique current approaches to risk analysis and risk management.


Course description:

This course will focus on general risk analysis framework, study design aspects for exposure assessment, and quantitative methods for estimating the probability and consequences of adverse outcomes, primarily with respect to human health endpoints associated with environmental contamination. Emphasis will be given to the general risk analysis framework, exposure assessment, and probabilistic analysis of both variability and uncertainty. The major topics of the course include: (1) an introduction and overview of "base rate" statistics regarding risks to humans; (2) data and models for exposure assessment; (3) an overview of approaches to health risk assessment, including characterization of dose-response relationships; (4) quantitative approaches to characterizing variability and uncertainty in the inputs to exposure and risk models; (5) quantitative methods for propagating variability and uncertainty through models and interpretation of results; and (6) issues in risk management.



This course requires graduate student standing with basic understanding of statistical concepts.  Therefore, a prerequisite of ST 511 or 515 or equivalent is required.  If you have any questions regarding your qualifications for this course, please contact either of the instructors.


NOTE:  This course is team-taught by Dr. Frey of Civil, Construction, and Environmental Engineering and by Dr. Yim of Nuclear Engineering.