Evaluated the effects of nature α-olefins (limonene, β-caryophyllene and camphene) as additives on the cold flow properties of diesel fuel

Pour Point Depressants (PPDs) are currently deemed the most efficacious methodology to enhance the lowtemperature fluidity of diesel fuel. However, the majority of these PPDs present complications such as high costs, intricate synthesis procedures, and exhibit potential biotoxicity. To address these challenges, natural alpha-olefins (beta-caryophyllene, limonene and camphene) with 1-hexadecene in varying ratios (5, 10, 15, 20, 25:1) were successfully polymerized at ordinary temperature as poly-alpha-olefine pour point depressant (PAO PPD), and designated as 1-hexadecane-beta-caryophyllene (C16-SZX), 1-hexadecane-limonene (C16-NMX), 1-hexadecanecamphene (C16-KX). An in-depth examination was conducted on the cold filter plugging point (CFPP) and solid point (SP) of both untreated and PPD-added diesel. Subsequently, the finding clearly demonstrates that the CFPP and SP were separately reduced 10 and 32 degrees C in diesel treated with a molar ratio of 10:1 of C16-KX at the dosage of 2000 ppm. Meanwhile, a comprehensive study was undertaken to investigate the influence of natural alpha-olefins on the reduction of low-temperature fluidity in diesel fuel. The inhibitory impacts of natural molecular formations on wax crystals were meticulously scrutinized, particularly their roles in modifying the growth patterns of these crystals. Eventually, a novel mechanism by which poly-alpha-olefine alters the crystalline behavior of wax crystals is proposed.