By Vassilis Inglezakis, Stavros Poulopoulos
Adsorption, Ion alternate and Catalysis is basically a mix of environmental technology and chemical reactor engineering. extra particularly, 3 vital heterogeneous strategies, particularly, adsorption, ion alternate and catalysis, are analysed, from basic kinetics to reactor layout with emphasis on their environmental purposes. In bankruptcy 1, the topic of air and water toxins is handled. facts approximately toxins and emission resources are given and the remedy equipment are presently provided. In bankruptcy 2, the very fundamentals and historic improvement of adsorption, ion trade and catalysis are awarded in addition to their environmental functions. bankruptcy three is dedicated to heterogeneous approaches and reactor research. all kinds of reactors are defined intensive and reactor modelling, hydraulics and mass/heat move phenomena are tested for every form of reactor. Chapters four and five are devoted to adsorption & ion trade and catalysis, respectively. the elemental rules are provided together with kinetics, equilibrium, mass/heat move phenomena in addition to the analytical ideas of the reactor versions provided in bankruptcy three. within the 6th bankruptcy, the topic of scale up is approached.The Annexes on the finish of the booklet include actual homes of gear of environmental curiosity in addition to unit conversion tables. ultimately, approximately all of the examples contained are in response to actual experimental facts present in literature with environmental curiosity. lots of the examples contemplate all elements of operation layout - kinetics, hydraulics and mass transfer.* presents uncomplicated wisdom of significant environmental difficulties and connects them to chemicalengineering
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Extra info for Adsorption, Ion Exchange and Catalysis: Design of Operations and Environmental Applications (2006)
1 Definitions 35 Catalysis can be generally described as the action of a catalyst, which is a substance that accelerates the rate of a chemical reaction, while itself remaining unchanged by the reaction. There are two main categories of catalysis: • • homogeneous catalysis, where the catalyst is in the same phase with the reactants, heterogeneous catalysis, where the catalyst is present in a different phase from the reactants in the reaction. Heterogeneous catalysis is often called surface catalysis as it mainly occurs between a solid surface and a gas.
We should keep in mind that in the event of a complex reaction network, which is often the case, the catalyst might affect each reaction to a different extent, thus changing the overall reaction selectivity. 6) Consequently, under these conditions, ethanol may be totally oxidized to carbon dioxide via the first reaction, partially oxidized to acetaldehyde via the second reaction, dehydrogenized 36 2. Adsorption, Ion Exchange, and Catalysis to acetaldehyde via the third reaction, dehydrated to ethylene via the fourth reaction, dehydrated to diethylether via the fifth reaction, and finally decomposed to methane via the last reaction.
Activated carbon was recognized as an efficient purification and separation material for the synthetic chemical industry in the 1940s. By the late 1960s and early 1970s, activated carbon was used in many applications for removing a broad spectrum of synthetic chemicals from water and gases. 3, the history of adsorption is presented briefly. 2 Ion exchange The first citation of an application of ion exchange can be found in Aristotle’s Problematica, where it is mentioned that sand filters were used for the purification of sea and impure drinking waters.