Abstract
Publisher Summary In this chapter, it is approached that the functional relationship between particle size and the maximum hydrocarbon chain length formed on it, and the functional properties of q(An) is also investigated. The results support the viewpoint that the negative deviation from ASF distribution is caused by the cut-off effect of small particle size. In recent years, a lot of negative deviations from Anderson-Schulz-Flory (ASF) distribution were observed on highly dispersed catalysts. It has been suggested that the negative deviation might be caused by external origin, such as wax deposition in transient condition. Some deviations are due to these external reasons, but many others are not, especially for the recent experimental results by Snel, who claimed that all the external effects were eliminated in his experiment and the negative deviation was only chemically induced. A number of papers suggest that the carbon number distribution is related to the size of metal crystallite, particularly, that the length of the growing chain is limited by the dimensions of the metal crystallite.
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