Towards a greater olefin share in polypropylene cracking – Amorphous mesoporous aluminosilicate competes with zeolites

[Display omitted] •The highest olefinicity products found for the HAlMCM-48.•The HAlMCM-48 as a successful additives of the FCC catalyst.•Low coke formation in HMCM-48 reported in advanced operando IR and UV–vis studies. For plastic waste cracking the path for production of high olefins yield without loose in gasoline fraction is an intriguing option. Among the commercial FAU zeolites of different properties and mesoporous HAlMCM-48 materials, the catalysts of polypropylene (PP) cracking being able to operate in low-temperature regime was searched. The aim was to investigate the effects of the presence of mesopore system in the context of internal and external acidic features on PP cracking. The advanced operando FT-IR and UV–vis characterization coupled with GC and MS analysis offered insight into the nature of active species during cracking reaction as well as into the nature of coke deposit formed after reaction. The results for series of FAU zeolites were faced with mesoporous HAIMCM-48 as the catalyst of similar cracking competence, as it will be documented.