methods of catalyst regeneration

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powerpoint presentation * methods of catalyst regeneration a y c a t l s i s * what is a catalyst ? catalyst is a substance that increases the rate of the reaction at which a chemical system approaches equilibrium , without being substantially consumed in the process. catalyst affects only the rate of the reaction,i.e.kinetics. it changes neither the thermodynamics of the reaction nor the equilibrium composition. * activation energy activation energy : the energy required to overcome the reaction barrier. usually given a symbol ea or ∆g≠ the activation energy (ea) determines how fast a reaction occurs, the higher activation barrier, the slower the reaction rate. the lower the activation barrier, the faster the reaction * catalyst lowers the activation energy for both forward and reverse reactions. activation energy * activation energy this means , the catalyst changes the reaction path by lowering its activation energy and consequently …
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the primary catalyst the support may also act as a co-catalyst (bi-functional) or secondary catalyst for the reaction (promoter) * * * * * end of the catalysis and catalysts thank you references a.corma,inorganic solid acids and their use in acid-catalyzed hydrocarbon reactions. chem. rev.1995, 95, 559-614. bruce c. gates, catalytic chemistry.1992. zaki seddigi, characterization of the acidic properties of zeolite and their catalytic behavior in the synthesis of mtbe. 1994. ali el-rayyes, study of the photochemical properties of some aromatic compound on molecular sieves using a picosecond pulse laser system. 2001. keith laidler, chemical kinetics, 1987.
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powerpoint presentation * methods of catalyst regeneration a y c a t l s i s * what is a catalyst ? catalyst is a substance that increases the rate of the reaction at which a chemical system approaches equilibrium , without being substantially consumed in the process. catalyst affects only the rate of the reaction,i.e.kinetics. it changes neither the thermodynamics of the reaction nor the equilibrium composition. * activation energy activation energy : the energy required to overcome the reaction barrier. usually given a symbol ea or ∆g≠ the activation energy (ea) determines how fast a reaction occurs, the higher activation barrier, the slower the reaction rate. the lower the activation barrier, the faster the reaction * catalyst lowers …

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