Download PDF by Randolph Norris Shreve; George T Austin: Shreve's Chemical process industries

By Randolph Norris Shreve; George T Austin

ISBN-10: 0070571473

ISBN-13: 9780070571471

ISBN-10: 0070661677

ISBN-13: 9780070661677

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Consider the associated changes to be relatively small. Thus '( KE ) | 0 and '( PE ) | 0 . com 46 Non-Isothermal Reactors Fundamentals of Reaction Engineering Shaft work: A system that has work done on it experiences the conversion of mechanical energy to internal energy, U. This is the energy associated with the structures and molecular motions of molecules. e. fluid) on the environment is normally associated with energy effects involving stirring. Strictly, we must take account of the mechanical energy that the stirrer imparts to the reaction mixture.

The set of mass balance equations to be solve simultaneously may now be written as: d [1 dVR  rA1 ( 1 ) k1C A d[2 dVR  rA2 ( 2 ) §1· 2 ¨ ¸ k 2C A 2 © ¹ d[3 dVR  rC3 ( 1 ) k3CC  k3CD CE k1 nA vT 2 § 1 · nA k ¨ ¸ 2 2 © 2 ¹ vT k3 (Eqs. 2. com 43 Reactor Design for Multiple Reactions Fundamentals of Reaction Engineering Now we make use of the definition of [j, in the equation ni  ni0 J ¦ Q ij[ j , where [ is defined as the extent j j 1 of “reaction j” and J is defined as the total number of reactions.

8) may now be written as ¦ ni0 H fi ( T0 )  ¦ ni H fi ( T ) Energy flow in Energy flow out  0 , Q Heat exchange (Eq. 12) Accumulation (nil at steady state) where the subscript ‘0’ in Eq. 12 refers to the reactor inlet conditions. In a “non-isothermal CSTR,” the temperature is uniform everywhere within the reaction zone. Non-isothermal behaviour in a CSTR refers to differences between the feed temperature (T0) and the reaction temperature (T), the heat absorbed or released by the chemical reaction and to heat exchange between the reactor and the surroundings.

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Shreve's Chemical process industries by Randolph Norris Shreve; George T Austin

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