By James Blake Rawlings
This can be a chemical engineering textbook for undergraduate and graduate scholars in reactor layout and response engineering classes.
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Extra resources for Chemical Reactor Analysis and Design Fundamentals
I l l ( Setting the Stage 10 volume divided by the feed volumetric flowrate; this quantity has the units of time, and can be thought of as the time required to displace the equivalent of one reactor volume. Batch times and residence times can be as short as milliseconds for high-temperature, gas·phase reactions, such as ammonia oxidation and HeN synthesis in flow reactors, or as long as days for liquid-phase fermentation reactions in batch reactors. The rate of chemical reaction has units of moles/time-volume and is a function of temperature and composition.
Notice that for this example v i s a 2 0 x 1 4 matrix, and i t contains many zero entries. A matrix "ith many zero entries is called sparse. The large number of zeros simply reflects the physical fact that very I I few molecules can take part in a particular reaction. All of the reactions in the CVD chemistry, for example, are unimolecular or bimolecular. 5. I is the molecular weight of species j. Solution In a chemical reaction, the number of molecules is not conserved in general. For example in the nitric oxide reaction, three reactant molecules react to form two 2NO + 02 = 2N02, product molecules.
The following chemistry has been proposed to de scribe a silicon chemical vapor deposition «(YD) reaction, which is an important process in the production of microelectronic materials. :j + + SiB4 + SiH4 SiH4 + + SiH, + Sill4 + Si + SiH4 :;:;:= 5jHz + Hz SiH4 SiH] + H = c;= SiZH6 Hz :::::= SiH4 H = SiBj SHh SiH] -:;::::::. 14) Sh :;::::: 5bHz + SieHj Si2Hz + Si,H2 SbH2 ::= SlzH4 + Hz = = S;,Ii5 H � SbH3 Sh -:;::::::. 2Si;; The student should not b e dismayed by the complexity of this reac tion network.
Chemical Reactor Analysis and Design Fundamentals by James Blake Rawlings