Influence of the hydrocarbons distribution on the heat produced during Fischer-Tropsch synthesis

The heat produced during Fischer-Tropsch synthesis has been calculated, considering a base case in which a typical Anderson-Schulz-Flory (ASF) distribution is followed by the paraffinic hydrocarbons produced. An equation has been obtained, which allows us to calculate the enthalpy of reaction, using the probability of chain growth as the variable. The effect of a deviation from the ASF distribution has been considered, through the example of a higher methane selectivity than in the base case. The correction due to the condensation of higher hydrocarbons has also been evaluated. In order to be able to perform energy balance calculations, the physical state of water at the reactor outlet has been checked.