CHE 311: Introduction to Chemical Processing

1 CHE 311: Introduction to Chemical ProcessingJeff Heys2:40-3:55 pmPS H152A little about me ..zOffice: ERC 287zOffice hours: Monday 9:30 11:30 andWednesday 1:00 2:00zOffice phone: 480-965-0874zEmail: have two young children, so do not call my home after 8:00 pm, plan to learn your name, so please use the provided name plate till the first midterm you elect to not use the name plate, I will feel compelled to call on you so that I can learn your name by alternative is in your best interest to meet your for this the prerequisites important? No, you only need to be an algebra ninja and be very good at balancing Chemical equations. Much of the chemistry terminology will also be I need to purchase the expensive textbook? Probably, homework will be assigned from the book and it will be an important reference, but, technically, you can get through the course without it.

2 Will I be evaluated , how are grades determined? Homework is 30%, there are two midterms at 20% each, and a final worth 30%. Class participation may help in borderline Yes, your 10 best homework grades will count (but I only plan to assign 10 or 11 homeworks). Please work with others on the homework, but do NOT copy from any source. Assignments are posted on the course should I prepare for exams? Old exams from the instructor do not exist. The assigned homework problems are, by far, the best resource. At least one homework problem will appear on each there are curve? Hopefully not, but if the class average is below a C+, grades will be curved up to approximately that homework? Accepted, but the late penalty is steep at 25% per day (weekends excluded). much of the text will be covered? Approximately the first 9 chapters, but the first 3 chapters will be skimmed quickly even though you should know the information in those need help, what should I do?

3 First, start the homework, which will normally be due on Wednesday, early so that you can utilize the office hours. Second, work with a group. Third, it may be possible to hire a tutor. Fourth, do more problems (scrimmage). Fifth, know when to fold ( , withdraw while you can). does a Chemical engineer do? Read chapter will we learn in this class? The basics of mass and energy balances the foundation of engineering and many of the sciences. More on this later, but, remember, the tools learned here will be used extensively in other class, so learn them is this class so focused on a single concept ( , why is it so monotonous)? See movie is this class so freaking hard? I haven t left the library for 4 days? Three reasons: (1) the material is the foundation for all of Chemical engineering , and it must be mastered, (2) we (the Chemical engineering faculty) do not want a senior to fail a course, and (3) I want you to know what you are capable of doing (be the best you can be).

4 The lectures be posted online? No, only this first lecture will be presented using the computer. Most other lectures will be presented on the chalkboard as they are focused more on problem solving and less on pure information exchange. You are free to borrow my notes for photocopying provided you have a reasonable guidelines? A , ever, answer a cell phone. If it rings more than once or twice a semester your grade will suffer. If you are late or leave early, please sit near the door. Habitual tardiness will affect your grade. Explaining your tardiness after class will help. Keep laptops near the do you hate Microsoft? I don t hate Microsoft. I believe they sold an operating system that was inferior to the alternatives for many years, and they charged a lot of money for it. Their current OS, which is on this computer, is secure, stable, and still expensive.

5 I also believe that near monopolies are bad for consumers even though I consume lots of Starbucks , so then why don t you post Word documents (*.doc) or Powerpointdocuments (*.ppt)? Because then I m requiring you to spend $$ on MS Office. I believe that people should only exchange files using formats that have published interpretations or specifications ( , *.html, *.txt, *.pdf, *.tex, or any of the open document formats). paid for a 75 minute lecture, but you almost never give me what I paid for, instead I get a measly 65 or 70 minute lecture? First, I like to leave a little time at the end for questions. Second, in my experience, no one listens for the last 5 minutes. Third, I m trying to encourage you to start on the homework while the material is fresh in your mind. Fourth, there usually isn t a single H2O molecule left in me after 70 minutes of the language of Chemical problem statements into pictures into the the solutionsA Black most of this course, we won t be concerned with the details of Chemical Processing equipment.

6 Instead, we will draw a boundary, which defines a system, around the region of or Black BoxzMay contain multiple pieces of be a fixed size or a variable contain Chemical reactionsMass BalancezLet s assume there are no Chemical s assume the process is operating continuously at steady-state (all time derivatives are equal to zero).zLet mbe the mass flow rate (kg/s)outinmm&&=Mass BalancezLet s assume there are no Chemical mbe the mass flow rate (kg/s)outinonaccumulatimmdtdmoutin = =&&General Mass BalancezFor a single species created or destroyed by a Chemical (equation in text)nconsumptiogenerationoutinonaccumul ati + =ExamplezFirst, we have to pick a use my skin as the boundary of a system consisting of ll do a TOTAL mass balance, and since mass cannot be created or destroyed (only individual chemicals can be reacted into or out of existance), the generation and consumption terms are noon on August 9, 2005, I weighed 190 consumed: 96 oz.

7 Of liquid (6 lbs)32 oz. of food (2 lbs)zI excreted (assuming 1 lb. per flush):7 lbs (7 flushes)ExamplezAt noon, August 10, 2005, I weighed 190 = 0 Out = 8 lbs. 7 lbs. = 1 aren t they equal?This will change the way you The Matrix , we re told that the machines use people as an energy source, which is possible, and that they feed people ground up dead people, which is also possible. So, an energy balance on a single person does not violate any physical , what if we do an energy balance on all the people as a single, steady-state next chapters 1, 2, and 3zReview unit conversion (pay special attention to lbfvs. lbm)zSignificant digits (??)zWe will not be specifically covering chapters 1 and 2 in class. We will cover chapter 3 on we down a question that you have about this class or about what we covered today.