Material balance reactor

The gas-phase material balances can be written in the classic form of CSTR reactor material balances (Levenspiel, 1972) ... 

Fig. 1.17. Continuous stirred-tank reactor material balance over rth tank in steady state...

Let us consider unit volume of the reaction mixture in which concentrations are changing with time this unit volume may be situated in a batch reactor or moving in plug flow in a tubular reactor. Material balances on this volume give the following equations ... 

The modelling of real food webs can be an exceedingly complicated task but, to illustrate the basic technique, a situation may be defined where a continuous stirred-tank biological reactor contains two species, one the predator, the other the prey. The food for the prey is assumed to enter as the sterile feed stream to the reactor, so that the predator may only consume the prey which grows in the reactor. Material balances can be drawn up for the process in much the same way as has... 

The basic developments reported herein can be used to predict multicomponent adsorption rates in different types of contacting units, such as slurry adsorbers, moving bed units and columnar operation. The adsorption rate and equilibrium equations would remain the same, but the reactor material balance equation would be different depending on the reactor type and geometry. Thus, the multicomponent adsorption model can be utilized in practical processing applications in the chemical industry, air pollution control, and water and wastewater treatment. 

Insert the rate expression into batch-reactor material balance. A transient material balance for the NaOH on an isothermal batch reactor becomes (NaOH in) — (NaOH out) + (net NaOH generation) = NaOH accumulation. For this system,... 

Figure 116. Ammonia production based on heavy fuel oil (l.inde flow scheme with Texaco gasification) a) Air separation unit h) Soot extraction c) C02 absorption d) Methanol/H,() distillation e) Stripper f) Mol regenerator g) Refrigerant h) Dryer i) liquid N2 scrubber j) Syngas compressor k) Nil, reactor Material Balance...

Rate expressions. To solve the reactor material balance, we require an expression for the production rate, Rj, for each component. As shown in Chapter 2, the production rate can be computed directly from the stoichiometry and the reaction rates for all reactions, r,. Therefore we require an expression for the reaction rates in terms of the concentrations of the species. This topic occupies the majority of Chapter 5. For the purposes of illustrating the material balances in this chapter, we simply use some common reaction-rate expressions without derivation. These rate expressions may be regarded as empirical facts until the next chapter when the theoretical development of the rate expressions is provided. 

Assiuning an ideal plug flow reactor, material balances can be written for 111 TCA, and coke. 

Additional experimental data are summarized in Table III in order of increasing flow rate at NTP for the 2% CO, 3% O2 and 1% 1-butene in argon feed mixture. These experimental results in the regions of oscillations indicated that at fixed reactor space time, higher temperatures resulted in period and amplitude decreases for all components of the reacting system. At constant temperature, space time decreases also resulted in period and amplitude decreases. The time-averaged rates of oxidation of both CO and 1-butene increased with temperature and with reduction in space time. Reactor material balances suggested that 1-butene oxidation was essentially complete to CO2 and H2O. 

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