Abstract
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.
Highlights
Waste polymers are a growing environmental problem
Nevertheles, waste polymers of high H/C ratios and molecular chain structures, e.g. low-(LPDE) [3] and high- (HDPE) den sity polyethylene [4], polypropylene (PP) [5], and poly(vinyl chloride) (PVC) can be converted in liquid fraction upgraded to trans portation fuels
The results indicated the relatively higher catalytic activity of Al-MCM-48 than that of Si-MCM-48
Summary
Waste polymers are a growing environmental problem. Their burning highly contributes to air pollution, on the other hand, they are hardly biodegraded. Nevertheles, waste polymers of high H/C ratios and molecular chain structures, e.g. low-(LPDE) [3] and high- (HDPE) den sity polyethylene [4], polypropylene (PP) [5], and poly(vinyl chloride) (PVC) can be converted in liquid fraction upgraded to trans portation fuels. Such a solution serves as an additional energy source but could mitigate environmental issues. Waste polymers conversion should lead to high share of low molecular weight paraffin characterized by high iso/normal ratio with low olefin yields
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