Temkin equations problems with

More seriously, however, simple inspection of the Temkin equation reveals that it gives an infinite rate at very low partial pressures of ammonia. This does not give rise to problems in the interpretation of plant data where, due to the recycle nature of the process, appreciable amounts of ammonia are present in the feed gas. However, for catalyst testing in laboratory equipment, where pure synthesis gas is commonly used, the Temkin equation should be employed with much caution. Suitable modifications which overcome this inconvenience are available, and these are shown in Section 6.1.4. 

Pyzhov Equation. Temkin is also known for the theory of complex steady-state reactions. His model of the surface electronic gas related to the nature of adlay-ers presents one of the earliest attempts to go from physical chemistry to chemical physics. A number of these findings were introduced to electrochemistry, often in close cooperation with -> Frumkin. In particular, Temkin clarified a problem of the -> activation energy of the electrode process, and introduced the notions of ideal and real activation energies. His studies of gas ionization reactions on partly submerged electrodes are important for the theory of -> fuel cell processes. Temkin is also known for his activities in chemical -> thermodynamics. He proposed the technique to calculate the -> activities of the perfect solution components and worked out the approach to computing the -> equilibrium constants of chemical reactions (named Temkin-Swartsman method). 

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