CBE QUIZ 2

cbe 150 quiz 2 terms

High Yield

amount of product per reactant fed

High Selectivity

amount of desired product compared to undesired product

High Conversion

how much reactant was used up

Low Residence Time

how much time material spends inside reactor

In chemical reactions, what can you change?

Temperature, pressure

Time (for BATCH process)

Catalyst (lowers activation energy of reaction)

Ratio of reactants

Type of reactor (CSTR, PFR)

Reaction rate

ri = dci/dt

in ri = dci/dt, what is ri?

reaction rate (function of T, P, catalyst, concentrations)

in ri = dci/dt, what is ci?

concentration (moles of i/volume of reactor)

in ri = dci/dt, what is t?

time

what is kA?

reaction rate constant

first order irreversible reaction

rA = dcA/dt = -kAcA

what is EA?

activation energy

what is R?

gas constant

what is T?

temperature (absolute)