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FIGURE 6. FTIR spectra of H/ZSM-5 zeolites before and after ammonia adsorption FIGURE 7. Percent conversion of n-hexadecane using various H/ZSM-5 catalyst Figure 7 showed the percent conversion of n-hexadecane cracking. According to Fig. 7, H/ZSM-5_h/t showed higher conversion of n-hexadecane than H/ZSM-5_m. This data confirmed that the appearance of mesoporous will facilitate the mass transportation of reactant into active site of catalyst easier than in microporous catalyst. CONCLUSIONS Both microporous and hierarchical ZSM-5 zeolites, ZSM-5_m and ZSM-5_h/t, had been successfully synthesized using TPAOH as directing agent. Meanwhile, ZSM-5 zeolites that was synthesized using ethylenediamine and triethylenetetramine as template were not well formed. H/ZSM-5_h/t zeolites had been successfully prepared through ion exchange-treatments and their catalytic activity was tested in cracking of n- hexadecane. The result showed that ZSM-5_h/t delivered higher conversion than ZSM-5_m, with 37.23 and 17.9 in % moles, respectively, as it provided the larger average pore diameter and higher acidity properties. It can be suggested that H/ZSM-5_h/t is promising catalyst additive in heavy crude oil cracking reaction. ACKNOWLEDGMENTS This work was funded from collaboration research project between PT. Pertamina (Persero) and Universitas Indonesia year 2016 – 2017 number 004/E20400/2016-S0. 020088-5PDF Image | ZSM-5 zeolite using various templates as cracking catalysts
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