stepwise reaction

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stepwise reaction

[¦step‚wīz rē¦ak·shən]

(chemistry)

A chemical reaction in which at least one reactive intermediate is produced and at least two elementary reactions are involved.

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where C is the concentration of components such as Jatropha curcas triglyceride (JTG), Jatropha curcas diglyceride (JDG), Jatropha curcas monoglyceride (JMG), glycerol (GL), Jatropha curcas methyl ester (JME), and methanol (MeOH) and k is the effective rate constant of each stepwise reaction.

For these reasons stepwise reactions cannot go on under a normal reaction mechanism.

From Table 2, it can also be seen that the rate constants (k) also increased as the reactions progressed through the three stepwise reactions. The rate constants for the forward reactions were considerably higher than those for the reverse reactions.

Dynamic modeling of reversible methanolysis of Jatropha curcas oil to biodiesel

The stepwise reactions are: equationIn general, the transesterification reaction of TG with methanol (MeOH) in the presence of a suitable catalyst, to form three moles of ME and a mole of Glycerol (Gl) [14].

Kinetics of Citrulus Colocynthis Oil Transesterification

The stepwise reactions can be termed as pseudo-homogeneous catalyzed reactions, following second-order kinetics.

Two-layer predictive control of a continuous biodiesel transesterification reactor

He began with studies of the application of Marcus Theory to organic reactions, then developed Multidimensional Marcus Theory to treat concerted reactions in terms of the hypothetical stepwise reactions, and recently developed No Barrier Theory, which allows calculation of the rate constants for a great many reactions in solution with no adjustable parameters.