Class Notes (806,752)
United States (312,188)
CHEN 2001 (10)
Lecture 9

# ChEn 2001 Lecture 9/6/2013

2 Pages
139 Views

School
University of Minnesota Twin Cities
Department
Chemical Engineering
Course
CHEN 2001
Professor
Kechun Zhang
Semester
Fall

Description
9/6/2013 Generation-consumption analysis  We want to make the most out of the least (and least expensive) raw material with fewest byproducts  systematic method for solving multiple reaction pathways  V ikstoichiometric coefficient of compound i in reaction k  Sample rxn: o A + B  C 1 o C + D  E 2  Steps: o 1) Balance rxns for all k steps o 2) List all I compound in a column Compound R1 R 2 νnet A 1 -1 0 B 0 2 2 C 2 -1 *want this to be 0…want no net intermediate D E o 3) For each rxn, k, write down vik o 4) sum across rows to get net stoichiometric coefficient o 5) Find ϗ fkr rxns involving a given compound to get 0 generation/consumption  ϗ is the coefficient for rxn. ν is stoichiometric coefficient  νinet ∑ = 0  *step 5  A + B  2C ϗ 1 1  C + D  E ϗ 2 2  ϗ ϗ + ϗ (-1) = 0 1 2 2  Ammonia and antibiotics…reason for why population ↑  Ex:1.5 Ammonia Synthesis proceeds by o 1) reacting steam (H O) wth methane (CH ) to make carbon monoxide and 2 4 hydrogen. o 2) Then carbon monoxide and water react to make carbon dioxide and hydrogen. o 3) Finally, nitrogen and hydrogen react to make ammonia o *there is no net carbon monoxide and hydrogen o HOW TO SOLVE: o Balance the reaction  R 1 H2O + CH 4 CO + 3H 2  R 2 CO + H 2  CO + 2 2  R 3 N2+ 3H 2 2NH 3 o Step 2 ϗ ϗ ϗ 1 2 3 Compound R1 R2 R 3 νnet CH 4 -1 -1 H2O -1 -1 -2 *CO +1 -1 *H2 +3 +1 -3 +1 CO 2 +1 +
More Less

Related notes for CHEN 2001

OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Join to view

OR

By registering, I agree to the Terms and Privacy Policies
Just a few more details

So we can recommend you notes for your school.