Reaction engineering studies

Engelking, H., Pfaller, R., Wich, G. and Weuster-Botz, D. (2006) Reaction engineering studies on /3-ketoester reductions with whole cells of recombinant Saccharomyces cerevisiae. Enzyme and Microbial Technology, 38, 536-544. 

C. Wandrey, Reaction engineering studies on enzyme catalysts for the development of continuous processes, Habditation Thesis, TH Hannover, Germany, 1977. 

Rankin S. 1998. Kinetic, Structural, and Reaction Engineering Studies of Inorganic-Organic Sol-Gel Copolymers. [AVM]... 

Polyolefins are produced in practically all types of reactor configurations -autoclaves, tubular reactors, loop reactors, fiuidized-bed reactors - making them a prime choice for polymer reaction engineering studies. Polymerization may take place in either gas or liquid phases. For liquid-phase reactors, the monomers can be either liquid (as in the case of propylene and higher a-olefins) or dissolved in an inert diluent. Industrial catalysts for olefin polymerization are mainly heterogeneous, but some processes also use soluble catalysts. There are many different types of catalysts for olefin polymerization and they can be used to synthesize polymer chains with very different microstructures and properties. 

Mahoney, J.A. (1974) "The Use of Gradientless Reactor in Petroleum Reaction Engineering Studies," J.Catal., 32, 247. 

Edwards, J.H., Do, K.T. and Tyler, R.J. (1990) Reaction Engineering Studies of Methane Coupling in Fluidised-Bed Reactors , Catalysis Today 6,435-44. 

Certified that the work incorporated in the thesis entitled REACTION ENGINEERING STUDIES IN ION EXCHANGE RESIN CATALYZED ESTERIFICATION REACTIONS , submitted by Ms. Charubala Ananda Phalak... 

Some batch reactor modeling and reaction engineering studies of esterification reactions 28... 

REACTION ENGINEERING STUDIES IN ION EXCHANGE RESIN CATALYZED ESTERIFICATION REACTIONS... 

For L-fert-leucine [12,13] and some other amino and hydroxy acids [20,22,71], as well as for chiral alcohols [49], detailed reaction engineering studies have been performed and published in recent years [82]. The main targets were to increase tiie tin of the coenzyme involved, mainly NADH, and to decrease the product-specific catalyst consumption. Typical results are compiled in Table 5 for L-7erf-leucme as a highly soluble substrate, or product, and (5 )-l-pheny 1-2-propanol and (5)-2-octanol as poorly soluble products obtained in different types of reactors. The reactions analyzed are shown in Figs. 4 and 13, respectively. 

In reaction engineering, laboratory catal54ic reactors are tools or instruments to study how catalysts behave in some desired reaction. Quantitatively, the investigator wants to know how much of the desired product can be made per unit weight of catalyst, how much raw material will be used, and what byproducts will be made. This is the basic information needed to estimate the costs and profitability of the process. The economic consequence of our estimates also forces us to clarify what the rate limiting steps are, and how much transfer processes influence the rates, i.e., everything that is needed for a secure scale-up. Making the... 

Tests according to Bhasin s recommended experiments were executed at the laboratory of Berty Reaction Engineers, Ltd. on a test unit built for an export order. (The test unit was shown in Figure 4.4.1.) Results of this study were reported by Berty et al, (1989) and are reproduced here in the table on Figure 5.1.2. 

These operations are characterized by different reaction engineering properties. The transport of momentum, heat, and mass take place by different rates in the different operations, and the yield and selectivity obtained for a given chemical reaction will depend upon the type of operation employed. The operations also differ with respect to more loosely defined characteristics, such as ease of operation, and it can be noted in particular that some operations have been studied with considerably more thoroughness than others, and may consequently be designed with greater accuracy and reliability. 

The time that a molecule spends in a reactive system will affect its probability of reacting and the measurement, interpretation, and modeling of residence time distributions are important aspects of chemical reaction engineering. Part of the inspiration for residence time theory came from the black box analysis techniques used by electrical engineers to study circuits. These are stimulus-response or input-output methods where a system is disturbed and its response to the disturbance is measured. The measured response, when properly interpreted, is used to predict the response of the system to other inputs. For residence time measurements, an inert tracer is injected at the inlet to the reactor, and the tracer concentration is measured at the outlet. The injection is carried out in a standardized way to allow easy interpretation of the results, which can then be used to make predictions. Predictions include the dynamic response of the system to arbitrary tracer inputs. More important, however, are the predictions of the steady-state yield of reactions in continuous-flow systems. All this can be done without opening the black box. 

The Impact of Interdisciplinary Study on Biochemical Reaction Engineering... 

Particular attention is now given to the characterization of the supported species, and to the control of stability and recycling of the catalyst. The behavior of the supported catalyst under the reaction conditions (temperature, pressure, and nature of reactants and products) is certainly a less well-developed area, even though these data are valuable for the conception and development of a fully recyclable catalyst. Very few chemical engineering studies have been so far reported they will become crucial if the objective is the synthesis of an industrial catalyst. 

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