|
Flow Reactor
Continuous reactors (alternatively referred to as flow reactors) carry chemical materials as a flowing stream. Reactants are continuously fed into the reactor and emerge as continuous stream of product. Continuous reactors are used for a wide variety of chemical and biological processes within the food, chemical and pharmaceutical industries. A survey of the continuous reactor market will throw up a daunting variety of shapes and types of machine. Beneath this variation however lies a relatively small number of key design features which determine the capabilities of the reactor. When classifying continuous reactors, it can be more helpful to look at these design features rather than the whole system. Batch versus continuous Reactors can be divided into two broad categories, batch reactors and continuous reactors. Batch reactors are stirred tanks sufficiently large to handle the full inventory of a complete batch cycle. In some cases, batch reactors may be operated in semi batc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rate Of Reaction
The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. Reaction rates can vary dramatically. For example, the oxidative rusting of iron under Earth's atmosphere is a slow reaction that can take many years, but the combustion of cellulose in a fire is a reaction that takes place in fractions of a second. For most reactions, the rate decreases as the reaction proceeds. A reaction's rate can be determined by measuring the changes in concentration over time. Chemical kinetics is the part of physical chemistry that concerns how rates of chemical reactions are measured and predicted, and how reaction-rate data can be used to deduce probable reaction mechanisms. The concepts of chemical kinetics are applied in many disciplines, such as chemical engineering, enzymology and environmental en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batch Reactor
A batch reactor is a chemical reactor in which a non-continuous reaction is conducted, i.e., one where the reactants, products and solvent do not flow in or out of the vessel during the reaction until the target reaction conversion is achieved. By extension, the expression is somehow inappropriately used for other batch fluid processing operations that do not involve a chemical reaction, such as solids dissolution, product mixing, batch distillation, crystallization, and liquid/liquid extraction. In such cases, however, they may not be referred to as reactors but rather with a term specific to the function they perform (such as crystallizer, bioreactor, etc.). Many batch processes are designed on the basis of a scale-up from the laboratory, particularly for the manufacture of specialty chemicals and pharmaceuticals. If this is the case, the process development will produce a ''recipe'' for the manufacturing process, which has many similarities to a recipe used in cookery. A typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flow Conditioning
Flow conditioning ensures that the "real world" environment closely resembles the "laboratory" environment for proper performance of inferential flow measurement, flowmeters like Gas meter, orifice, gas meter, turbine, gas meter, coriolis, gas meter, ultrasonic etc. Types of flow Basically, fluid dynamics, Flow in pipe (fluid conveyance), pipes can be classified as follows – * Fully developed flow (found in world-class flow laboratories) * Pseudo-fully developed flow * Non-swirling, non-symmetrical flow * Moderate swirling, non-symmetrical flow * High swirling, symmetrical flow Types of flow conditioners Flow conditioners shown in fig.(a) can be grouped into following three types – * Those that eliminate swirl only (tube bundles) * Those that eliminate swirl and non-symmetry, but do not produce pseudo fully developed flow * Those that eliminate swirl and non-symmetry and produce pseudo fully developed flow (high-performance flow conditioners) Straightening devices such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
