Abstract
Diminishing fossil fuel reserves and the increasing consumption of light olefins are driving intensive research to find a new non-petrochemical substitute resource to produce light olefins. Biomass-derived bio-oil is a promising substitute resource because it is renewable, abundant, and carbon-neutral. In this study, three bio-oil models, oleic acid (OA), methyl laurate (ML), and waste cooking oil (WCO), were catalytically cracked over La2O3-modified ZSM-5 (LaZ) aiming for production of light olefins. The content of La2O3 in catalysts was adjusted to optimize the structure and properties of catalysts. The maximal light olefin yield was 131 mL/g for OA, 120 mL/g for ML, and 128 mL/g for WCO, which was obtained over the LaZ catalyst containing 6% La2O3 (6LaZ). The maximal light olefin selectivity was 36.1% for OA, 30.3% for ML, and 33.8% for WCO. The obtained light olefins mainly contained propylene (13.6–17.1%), ethylene (10.7–15.4%), and butene (5.3–6.3%). Aromatic hydrocarbons and graphite were the main ...
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