Catalytic Cracking of N-Heptane over Zeolites

摘要

Catalytic cracking, the largest catalyst consuming process, places stringent importance on the properties of the catalyst and the kinetics of the process. In the present paper, catalytic cracking of n-heptane has been discussed in detail over a non-conventional catalyst developed from waste coal fly ash. Experiments were conducted over commercial catalysts also to verify the comparative efficacy of synthesized catalyst. Effects of catalyst synthesis parameters on cracking of n-heptane were also investigated. Reaction parameters e.g. temperature, space velocity, mode of exchange of cation in the catalyst, were studied in detail. A general kinetic model has been developed for the reaction, which includes both mono and bi-molecular cracking path based on Langmuir adsorption isotherm. Catalyst deactivation was accounted for using 'time on stream' decay function.