Abstract
Various MFI-type zeolites were synthesized and the catalytic activities of them were compared for conversion of hexane, which is one of the main components of light naphtha. The reaction of propane was also studied toobserve the selectivity of cracking and dehydrogenation reaction.In Fig.1, product distributions of hexane conversion reaction are shown for MFI-type zeolites with Si02/Al203 molar ratios varying from 29 to 1490. Selectivity of aromatic hydrocarbon increased with decreasing Si02/Al203 ratios. The highest selectivity of aromatic hydrocarbons, 55.3 wt% in carbon base, was obtained by the zeolites with the lowest Si02/Al203 ratio of 29. Fig.1 also shows that methane formation increased with lower SiO2fA l203ratios. Zn or Ga loaded MFI-type zeolite gave the higher selectivity for the production of aromatic hydrocarbons. (Figs.2 and 3)The reaction of propane is summariz ed in Table 1. The conversion of propane by the zeolite with Si02/Al203 of 29 is higher than that by the zeolite with SiO2/Al203 of 66. However, the selectivity of cracking and dehydrogenation are of similar values. Selectivity of the dehydrogenation by Zn or Ga loaded zeolites is much higher than that of cracking. The selectivity of dehydrogenation in the propane conversion reaction is considered to be an important step for the enhancement of aromatic hydrocarbon yield.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
