NAVIGATION
Snunkhaem Echaroj, et al. Energy & Fuels, 2017, 31(9), 9465-9476.
Biologically derived 1-decanol can be successfully converted into olefin mixtures and di-n-decyl ether through a two-step process of dehydration reaction and oligomerization under different γ-alumina catalyst conditions. The hydrogenated dimers could potentially be used as diesel fuel after blending with lighter hydrocarbons, while the hydrogenated heavier hydrocarbons could serve as bio-based oil.
Dehydration reaction and oligomerization reaction of 1-decanol
· The dehydration reaction of 1-decanol took place in a stainless steel fixed-bed reactor at atmospheric pressure and temperatures ranging from 573 to 623 K. 1-Decanol liquid was pumped through the reactor at a constant residence time of 0.4 h. Effluent samples taken at different intervals were separated into two phases, with the top organic phase containing olefins and di-n-decyl ether products, and the bottom layer being aqueous.
· The olefin oligomerization trials were carried out in a 1,000 mL continuously stirred batch reactor with three necks using different catalysts (10wt% USY Zeolite, beta Zeolite, and mordenite Zeolite) at 474 K. Three different mixtures obtained from various dehydration reaction conditions were used as raw materials.
· The oligomers obtained from vacuum distillation were further fractionated into heavy dimer and trimer fractions by distillation at temperatures ranging from 523 to 623 K under vacuum. Subsequently, both dimer and trimer were hydrogenated using a hydrogen flow rate of 200 mL/min over 0.5%Pt/Al2O3.
Ashok, B., et al. Energy, 2019, 173, 494-510.
Studies have shown that alcohols are suitable additives for biodiesel because they overcome the disadvantages of biodiesel's higher viscosity and poorer performance. This work compares two higher alcohols (decanol and hexanol) as additives in red algae methyl ester (CIME) to develop suitable alternative fuels. The results showed that the thermal efficiency of the ternary mixture was higher than that of biodiesel. Diesel and biodiesel blends with the addition of 40% decanol showed better results in terms of emission characteristics.
Higher alcohol and Calophyllum Inophyllum biodiesel blends
· A total of four ternary blends and one binary blend were created by combining hexanol and decanol with diesel and CIME biodiesel at different concentrations.
· In the preparation of the ternary blends, the diesel content was kept constant at 50% by volume, while the remaining 50% was made up of varying concentrations of higher alcohol and biodiesel. These ternary blends were made using 30% and 40% higher alcohol with 10%-20% CIME biodiesel. The decanol samples were labeled as D50B20DE30 and D50B10DE40, while the hexanol samples were named D50B40H10, D50B20H30, and D50B10H40.
· Additionally, a binary blend called D50B50 was prepared using a 50%-50% volume ratio of diesel and CIME biodiesel. The blends were created using the splash blending technique, which is both commonly used and cost-effective.
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